Reuse and Salvage for Flywheel Assemblies {1156} Caterpillar

Caterpillar Products

All Cat Engines

Introduction

Table 1

Revision	Summary of Changes in SEBF8197
08	Added new serial numbers
07	Combined information from SEBF8050, SEBF8207, SEBF8824, SEBF8888, SEBF9048, SEBF9346, added 10 part numbers and repaired 5 pixelated illustrations.
06	Added new serial numbers

© 2019 Caterpillar® All Rights Reserved. This guideline is for the use of Cat dealers only. Unauthorized use of this document or the proprietary processes therein without permission may be violation of intellectual property law.

Information contained in this document is considered Caterpillar: Confidential Yellow.

This Reuse and Salvage Guideline contains the necessary information to allow a dealer to establish a parts reusability program. Reuse and salvage information enables Caterpillar dealers and customers to benefit from cost reductions. Every effort has been made to provide the most current information that is known to Caterpillar. Continuing improvement and advancement of product design might have caused changes to your product which are not included in this publication. This Reuse and Salvage Guideline must be used with the latest technical information that is available from Caterpillar.

For technical questions when using this document, work with your Dealer Technical Communicator (TC).

To report suspected errors, inaccuracies, or suggestions regarding the document, submit a form for feedback in the Service Information System (SIS Web) interface.

Canceled Part Numbers and Replaced Part Numbers

This document may not include canceled part numbers and replaced part numbers. Use NPR on SIS for information about canceled part numbers and replaced part numbers. NPR will provide the current part numbers for replaced parts.

Important Safety Information

Illustration 1	g02139237

Work safely. Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools to perform these functions properly. Safety precautions and warnings are provided in this instruction and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard. Therefore, the warnings in this publication and the warnings that are on the product are not all inclusive. If a tool, a procedure, a work method, or operating technique that is not recommended by Caterpillar is used, ensure that it is safe for you and for other people to use. Ensure that the product will not be damaged or the product will not be made unsafe by the operation, lubrication, maintenance, or the repair procedures that are used.

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Improper operation, lubrication, maintenance or repair of this product can be dangerous and could result in injury or death. Do not operate or perform any lubrication, maintenance or repair on this product, until you have read and understood the operation, lubrication, maintenance and repair information.

Safety precautions and warnings are provided in this manual and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons.

The hazards are identified by the safety alert symbol which is followed by a signal word such as danger, warning, or caution. The "WARNING" safety alert symbol is shown below.

Illustration 2	g00008666

This safety alert symbol means:

Pay attention!

Become alert!

Your safety is involved.

The message that appears under the safety alert symbol explains the hazard.

Operations that may cause product damage are identified by "NOTICE" labels on the product and in this publication.

Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard. The safety information in this document and the safety information on the machine are not all inclusive. Determine that the tools, procedures, work methods, and operating techniques are safe. Determine that the operation, lubrication, maintenance, and repair procedures will not damage the machine. Also, you must determine that the operation, lubrication, maintenance, and repair procedures will not make the machine unsafe.

The information, the specifications, and the illustrations that exist in this guideline are based on information which was available at the time of publication. The specifications, torques, pressures, measurements, adjustments, illustrations, and other items can change at any time. These changes can affect the service that is given to the product. Obtain the complete, most current information before you start any job. Caterpillar dealers can supply the most current information.

Summary

The two components that wear out most often on the flywheel are the reaction face and the flywheel ring gear. The reaction face of the flywheel can become damaged through normal wear or clutch failure. If the damage is light, the flywheel can be used again after the face is machined and after the thickness of the flywheel is within specifications. If the damage to the reaction face is heavy, and machining will not remove the damage to maintain the minimum thickness, the flywheel cannot be used again. The flywheel ring gear can become damaged due to a starter or a pump problem. If the damage to the ring gear is minimal, then the ring gear can be repaired within specifications. If damage to the ring gear is heavy, then remove the ring gear from the flywheel and replace the ring gear with a new ring gear.

Service Letters and Technical Information Bulletins

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NOTICE
The most recent Service Letters and Technical Information Bulletins that are related to this component shall be reviewed before beginning work. Often Service Letters and Technical Information Bulletins contain upgrades in repair procedures, parts, and safety information that pertain to the parts or components being repaired.

References

Table 2

References
Media Number	Title
SEBF8187	Reuse and Salvage Guidelines, "Standard Parts Marking Procedures"
SEBF8882	Reuse and Salvage Guidelines, "Using Lock-N-Stitch Procedures for Casting"

Tooling and Equipment

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NOTICE
Failure to follow the recommended procedure or the specified tooling that is required for the procedure could result in damage to components. To avoid component damage, follow the recommended procedure using the recommended tools.

Table 3

Required Tooling and Equipment
Part Number	Description	Qty
1U-9366	Automatic Tape Measure	1
1U-9915	Curved Handle Wire Brush	1
4C-4804	Penetrant	As needed
4C-9442	Flashlight	As needed
4S-9405	Caliper	1
5P-3920	Steel Ruler	1
5P-7414	Seal Pick	1
8S-2257	Eye Loupe	As needed
8T-5096	Dial Indicator Group	1
8T-7765	Surface Reconditioning Pad	As needed
9A-1593	Comparison Gauge	As needed
237-5181	Respirator	As needed
254-5319	Surface Condition Brush	As needed
262-8390	Microscope, Pocket 40x	As needed
263-7184	Crack Detection Kit	1
288-4209	Paper Towel	As needed
367-9109	Digital Caliper	1
385-8484	Level 305 mm (12 inch)	As needed
385-4008	Micrometer Tool Set, External 1524 mm (60 inch)	1
385-9422	Micrometer Extensions, Internal 50 - 609 mm (2 - 24 inch)	1
386-3364	Straight Edge	As needed
415-4055	Ultrasonic Tool Group	As needed
420-5317	Tool Cribbing	As needed
423-4373	Digital Caliper 0.0 - 203.2 mm (0.00 - 8.00 inch)	As needed
431-4150	Micrometer, External 25 mm (1 inch)	1
459-0184	UV Lamp Group	As needed
473-8688 or 473-8689	Micrometer, Inside 2.00 - 12.00 inch	1
	Micrometer, Inside 50 - 300 mm	1
473-8690	Micrometer, Outside 0.00 - 4.00 inch	1
473-8691	Micrometer, Outside 2.00 - 6.00 inch	1
473-8691	Micrometer, Outside 50.8 - 152.4 mm (2.00 - 6.00 inch)	As needed
473-8692	Micrometer, Outside 152.4 - 304.8 mm (6.00 - 12.00 inch)	As needed
474-3709 or 474-3710	Micrometer, Inside (8.00 - 32.00 inch)	As needed
	Micrometer, Inside 200 - 800 mm	As needed

Replacement Parts

Consult the applicable Parts Identification manual for your engine.

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When replacement parts are required for this product Caterpillar recommends using Caterpillar replacement parts or parts with equivalent specifications including, but not limited to, physical dimensions, type, strength and material. Failure to heed this warning can lead to premature failures, product damage, personal injury or death.

Standardized Parts Marking Procedure

Reference: SEBF8187Reuse and Salvage Guidelines, "Standardized Parts Marking Procedures".

The code is a Cat standard and is used to record the history of a component. The code will identify the number of rebuilds and hours at the time of each rebuild. This information is important and should be considered for any decision to reuse a component.

Ensure that the mark is not covered by a mating part. Use a metal marking pen to mark the code onto the component.

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NOTICE
Do not use numbering stamp punches to mark internal components. The impact from striking the stamp will cause an abnormal stress riser. The added stress riser may cause premature part failure.

Illustration 3	g06124077
DO NOT use numbering stamp punches to mark internal components.

The procedure for marking components is a Cat standard. This code is helpful when the machine is sold into a different territory after the first rebuild. During an overhaul, the previous code of a part should never be removed.

Example 1

Illustration 4	g03856853
Typical Example

Illustration 4 shows code (1-15). The first number (1) indicates that the gear had been rebuilt once. The second number (15) indicates that there were 15,000 hours on the gear at the time of rebuild.

Example 2

Illustration 5	g03856857
Typical Example

Illustration 5 shows code (1-12) and code (2-10). Code (2-10) represents the information from the second rebuild. The first number (2) indicates that the gear had been rebuilt twice. The second number (10) indicates that 10,000 hours accumulated on the gear between the first and second rebuild.

Note: Add the first and second rebuild hours to obtain the total number of hours for the gear in Illustration 5. In this example, the gear has a total of 22,000 hours.

Measurement Requirements

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NOTICE
Precise measurements shall be made when the component and measurement equipment are at 20° (68° F). Measurements shall be made after both the component and measurement equipment have had sufficient time to soak at 20° (68° F). This will ensure that both the surface and core of the material is at the same temperature.

Flywheel Nomenclature

Illustration 6	g06308310
Flat-Type Flywheel (1) Reaction face (2) Ring Gear

Illustration 7	g06308311
Deep-Type Flywheel (1) Reaction face (2) Ring Gear

Illustration 8	g06308307
Ear-Type Flywheel (1) Reaction face (3) Ears

Cleaning

Prior to any deep inspection, the flywheel must be cleaned and visually inspected. When cleaning, ensure everything that could interfere with inspection such as corrosion, dirt and oil is removed. During this step perform a brief visual inspection over the entire flywheel looking for any obvious damage or defects. Damage such as damaged spline gear teeth, visible cracks, deep gouges, excessive bore wear, and damaged bolt holes are not acceptable for salvage or reuse. If the flywheel is damaged, then it cannot be salvaged and must be discarded.

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Personal injury can result from working with cleaning solvent. Because of the volatile nature of many cleaning solvents, extreme caution must be exercised when using them. If unsure about a particular cleaning fluid, refer to the manufacturer's instructions and directions. Always wear protective clothing and eye protection when working with cleaning solvents.

Visual Inspection

Next, visually inspect the flywheel using a strong light source, as it may otherwise be difficult to distinguish small scratches and cracks. There are several different recommended methods of inspecting engine flywheels for signs of cracks, and crack inspection equipment is available through Caterpillar.

There are three methods recommended by Caterpillar to inspect components for cracks fluorescent penetrant: dry magnetic particle, and visible dye penetrant. The fluorescent penetrant inspection using a black light is the most desirable procedure of the listed methods. The high intensity black light and fluorescent chemicals will identify cracks normally not found using other methods. Refer to "Crack Detection Methods" for more information.

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Personal injury can result from improper handling of chemicals. Make sure you use all the necessary protective equipment required to do the job. Make sure that you read and understand all directions and hazards described on the labels and material safety data sheet of any product used to clean the components. Observe all safety precautions recommended by the chemical manufacturer for handling, storage, and disposal of cleaning agents.

Liquid Fluorescent Inspection

Tooling consists of: 459-0184 Ultraviolet Lamp, Cleaner/Remover Fluid, and 4C-4739 Developer

1. Thoroughly clean the surface to be inspected.

2. Spray or apply the cleaner/remover fluid on the part to remove any oil and/or contaminates from the surface.

3. Spray or apply the penetrant on the surface to be inspected. Allow the penetrant to remain on the surface for five to 30 minutes. This will allow the penetrant to enter the tightest indications or cracks.

4. Once the penetrant is allowed to settle into the crack for the recommended time, the penetrant must be removed from the surface.

5. Remove the penetrant by washing with water or wiping with moist paper towels. Care should be taken not to over-wash the surface, however it must be free of penetrant. Check with a black light to see if the chemical penetrant has been removed.

6. Spray or apply developer on the dry surface. Coat the entire surface with the developer. Allow the developer to dry for 10 minutes. Use dry, compressed air to reduce the drying time. The developer will draw the penetrant out of the crack to the surface.

7. Check the surface with a black light to highlight the location on any cracks. Black lights should be measured to ensure correct output 800 micro watts per square cm at the part surface, 380 mm (15.0 inch) away from the 125 watt bulb.

Flywheel Specifications

Thickness

The minimum distance on the flywheel from the mounting surface of the crankshaft to the reaction face of the flywheel. Only remove enough material to clean up the reaction face. Minimal removal of material will allow additional salvage later in the life of the engine.

Note: If the thickness of the flywheel does not meet the specifications, then the flywheel must be replaced.

Flatness

The flywheel must be inspected for flatness and runout. Flatness can be measured by using a surface plate and a dial indicator. Grinding is an acceptable method of removing material to obtain the required specifications. Grinding should not cause the flywheel to require further balancing. A list of suggested manufacturers for grinding equipment can be found on the last page of this document.

Note: After salvage, install the flywheel on the engine and check the flywheel runout. Resurface the flywheel if the repair limit is exceeded for either flatness or runout.

Surface Texture

Use a surface analyzer to check the surface texture of the reaction face after the flywheel has been cleaned, inspected, and resurfaced. The surface texture of the reconditioned flywheel should be similar to the surface texture of a new flywheel.

Salvage Specifications

Salvage specifications are given in this section for both deep-type and flat-type flywheels.

Deep-Type Flywheel

The following are recommended specifications for deep-type flywheels.

Illustration 9	g06176721
Deep-Type Flywheel (1) Reaction face (2) Clutch mounting surface (A) Depth (B) Thickness (C) Radius

1. Whenever grinding the reaction face of a deep-type flywheel, an equal amount of material must be removed from the top of the surface (2) as shown in the Illustrations 9. The distance between the reaction face and surface (A) is critical. This distance maintains the correct amount of clutch pressure.

2. The maximum amount of material that can be removed from the reaction face is 1.0 mm (0.040 inch).

3. Refer to the Flywheel Specifications Chart for the following dimensions:

• (A) Depth Dimension

• (B) Reaction Face Thickness

• (C) Radius

Flat-Type Flywheel

The following are recommended specifications for flat-type flywheels.

Illustration 10	g06176727
Flat-Type Flywheel (B) Thickness (C) Radius (D) Thickness (E) Angle

1. When grinding the reaction face of flat-type flywheel, it is important to maintain dimensions (C), (D), and (E) shown in the Illustration 10.

2. The minimum dimensions (B) from the crankshaft mounting surface to reaction face is listed in the chart below.

3. The maximum amount of material that can be removed from the reaction face is 1.00 mm (0.040 inch). Remove only enough material to clean up the reaction face. This will allow additional salvage by grinding if required during the life of the engine.

Ear-Type Flywheel

The following are recommended specifications for ear-type flywheels.

Illustration 11	g06308319
Ear-Type Flywheel (A) Distance between the reaction face and the top of the ears (B) Flywheel thickness

The ears (surface parallel to the reaction face) must be machined the same amount as the reaction face. The distance between the reaction face and the top of the ears (Dimension (A) in Illustration 11 is very important. This distance retains the correct amount of clutch pressure.

Worn areas on the ears can be rebuilt using a welding procedure.

Note: The flywheel is made of cast iron, a special electrode, 1U-5379 1/8” Weld Rod, must be used.

Table 4

Flywheel Specifications Chart
Part Number	Dimensions						Surface Texture
	A	B		C	D	E
		New	Min. Reuse
1W-7785	N/A	38.10 ± 0.25 mm (1.50000 ± 0.00984 inch)	35.10 mm (1.38189 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
1W-7786	N/A	38.10 ± 0.25 mm (1.50000 ± 0.00984 inch)	35.10 mm (1.38189 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
1W-7787	N/A	38.10 ± 0.38 mm (1.50000 ± 0.01496 inch)	36.10 mm (1.42126 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
1W-8577	N/A	38.10 ± 0.38 mm (1.50000 ± 0.01496 inch)	36.10 mm (1.42126 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
2W-0307	N/A	38.10 ± 0.25 mm (1.50000 ± 0.00984 inch)	35.10 mm (1.38189 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
2W-0765	N/A	117.45 ± 0.25 mm (4.62401 ± 0.01 inch)	116.45 mm (4.58 inch)	12.50 ± 0.50 mm (0.492 ± 0.020 inch)	N/A	N/A	6.0 µm (236.22 µinch)
3N-8803	N/A	44.27 ± 0.25 mm (1.743 ± 0.010 inch)	43.27 mm (1.704 inch)	3.00 ± 0.50 mm (0.118 ± 0.020 inch)	N/A	N/A	6.0 µm (236.22 µinch)
3N-9439	N/A	38.10 ± 0.25 mm (1.50000 ± 0.00984 inch)	35.10 mm (1.38189 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
4N-4853	N/A	71.42 ± 1.5 mm (2.81181 ± 0.05906 inch)	68.42 mm (2.69370 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
4P-3098	N/A	60.92 ± 0.25 mm (2.398 ± 0.010 inch)	59.92 mm (2.359 inch)	3.00 ± 0.50 mm (0.118 ± 0.020 inch)	N/A	N/A	10.0 µm (393.70 µinch)
4P-3357	N/A	58.0 ± 0.25 mm (2.28346 ± 0.00984 inch)	57.0 mm (2.24409 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27° ± 10°	0.8 ± 0.3 mm (0.03150 ± 0.01181 inch)	3.5 µm (137.80 µinch)
4P-3171	74.6 mm (2.94 inch)	42.9 mm (1.69 inch)	41.9 mm (1.65 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	N/A	N/A	10.0 µm (393.70 µinch)
4P-4794	N/A	43.99 ± 0.25 mm (1.732 ± 0.010 inch)	42.99 mm (1.693 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10	3.5 µm (137.80 µinch)
4P-6818	37.48 ± 0.25 mm (1.476 ± 0.010 inch)	47.51 ± 0.25 mm (1.870 ± 0.010 inch)	46.51 mm (1.831 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
4P-8169	N/A	49.92 mm (1.965 inch)	48.92 mm (1.926 inch)	1.00 ± 0.50 mm (0.039 ± 0.020 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10	3.5 µm (137.80 µinch)
4P-8494	74.60 ± 0.13 mm (2.937 ± 0.005 inch)	42.90 mm (1.689 inch)	41.90 mm (1.650 inch)	6.00 ± 1.00 mm (0.236 ± 0.040 inch)	N/A	N/A	3.5 µm (137.80 µinch)
4P-8502	N/A	43.00 ± 0.25 mm (1.693 ± 0.010 inch)	42.0 mm (1.65 inch)	1.0 ± 0.5 mm (0.04 ± 0.02 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10 degrees	3.5 µm (137.80 µinch)
4P-8515	N/A	43.00 ± 0.25 mm (1.693 ± 0.010 inch)	42.0 mm (1.65 inch)	1.0 ± 0.5 mm (0.04 ± 0.02 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10 degrees	3.5 µm (137.80 µinch)
4W-6730	N/A	43.99 ± 0.25 mm (1.732 ± 0.010 inch)	42.99 mm (1.693 inch)	0.76 ± 0.25 mm (0.030 ± 0.010 inch)	0.76 ± 0.25 mm (0.030 ± 0.010 inch)	27 ± 10	10.0 µm (393.70 µinch)
4W-7186	10.46 mm (0.412 inch)	39.93 ± 0.25 mm (1.572 ± 0.010 inch)	38.93 mm (1.53 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	N/A	N/A	3.5 µm (137.80 µinch)
5I-7638	N/A	70.50 mm (2.776 inch)	70.20 mm (2.764 inch)	0.90 mm (0.035 inch)	N/A	N/A	3.5 µm (137.80 µinch)
5N-4782	N/A	38.10 ± 0.25 mm (1.50000 ± 0.00984 inch)	35.10 mm (1.38189 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
6I-1577	35.70 ± 0.25 mm (1.406 ± 0.010 inch)	47.30 ± 0.50 mm (1.862 ± 0.020 inch)	46.30 mm (1.823 inch)	1.50 ± 0.50 mm (0.059 ± 0.020 inch)	N/A	N/A	10.0 µm (393.70 µinch)
6I-3667	N/A	38.2 ± 0.25 mm (1.50393 ± 0.00984 inch)	37.32 mm (1.46929 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	N/A	N/A	3.5 µm (137.80 µinch)
6N-1283	N/A	97.13 ± 0.25 mm (3.824 ± 0.010 inch)	96.13 mm (3.785 inch)	0.76 ± 0.25 mm (0.030 ± 0.010 inch)	0.76 ± 0.25 mm (0.030 ± 0.010 inch)	27 ± 3	10.0 µm (393.70 µinch)
6N-1301	51.31 mm (2.020 inch)	33.12 ± 0.5 mm (1.304 ± 0.020 inch)	32.12 mm (1.265 inch)	3.00 ± 0.50 mm (0.118 ± 0.020 inch)	0.76 ± 0.25 mm (0.030 ± 0.010 inch)	27 ± 3	10.0 µm (393.70 µinch)
7C-2484	N/A	81.79 ± 0.25 mm (3.220 ± 0.00984 inch)	80.79 mm (3.181 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
7C-3437	N/A	38.10 ± 0.25 mm (1.50000 ± 0.00984 inch)	35.10 mm (1.38189 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
7C-5168	9.6 mm (0.37795 inch)	65.4 ± 0.25 mm (2.57480 ± 0.00984 inch)	64.4 mm (2.53543 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	65° ± 1°	0.8 ± 0.3 mm (0.03150 ± 0.01181 inch)	10.0 µm (393.70 µinch)
7E-1733	N/A	49.50 mm (1.949 inch)	48.50 mm (1.909 inch)	0.80 ± 0.30 mm (0.032 ± 0.012 inch)	1.50 ± 0.30 mm (0.059 ± 0.012 inch)	27 ± 5	10.0 µm (393.70 µinch)
7N-9650	N/A	31.09 ± 0.25 mm (1.224 ± 0.010 inch)	30.09 mm (1.185 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
7W-1248	9.65 mm (0.379 inch)	84.43 ± 0.13 mm (3.324 ± 0.005 inch)	83.43 mm (3.285 inch)	1.0 ± 0.5 mm (0.04 ± 0.02 inch)	0.25 mm (0.010 inch)	27 ± 10	6.0 µm (236.22 µinch)
7W-1250	7.31 mm (0.288 inch)	117.45 ± 0.25 mm (4.624 ± 0.010 inch)	116.45 mm (4.585 inch)	0.8 ± 0.2 mm (0.032 ± 0.008 inch)	0.8 ± 0.2 mm (0.032 ± 0.008 inch)	27 ± 10	6.0 µm (236.22 µinch)
7W-3499	N/A	66.65 ± 0.25 mm (2.624 ± 0.010 inch)	65.65 mm (2.585 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
7W-9374	7.5 mm (0.29528 inch)	65.38 mm (2.57401 inch)	64.38 mm (2.53464 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	N/A	N/A	3.5 µm (137.80 µinch)
8N-8036	N/A	71.42 ± 1.5 mm (2.81181 ± 0.05906 inch)	68.42 mm (2.69370 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
9L-6392	N/A	38.10 ± 0.25 mm (1.50000 ± 0.00984 inch)	35.10 mm (1.38189 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
9L-6393	N/A	38.10 ± 0.25 mm (1.50000 ± 0.00984 inch)	35.10 mm (1.38189 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
9L-6394	N/A	38.10 ± 0.38 mm (1.50000 ± 0.01496 inch)	36.10 mm (1.42126 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
9L-6395	N/A	38.10 ± 0.38 mm (1.50000 ± 0.01496 inch)	36.10 mm (1.42126 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
9L-6396	N/A	38.10 ± 0.38 mm (1.50000 ± 0.01496 inch)	36.10 mm (1.42126 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
9l-6397	N/A	38.10 ± 0.38 mm (1.50000 ± 0.01496 inch)	36.10 mm (1.42126 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
9N-2648	73.70 ± 0.13 mm (2.902 ± 0.005 inch)	47.23 mm (1.859 inch)	46.23 mm (1.820 inch)	2.00 ± 0.50 mm (0.079 ± 0.020 inch)	N/A	N/A	6.0 µm (236.22 µinch)
9N-6449	N/A	38.10 ± 0.38 mm (1.50000 ± 0.01496 inch)	36.10 mm (1.42126 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
9Y-4143	15.8 mm (0.62205 inch)	65.2 ± 0.5 mm (2.56692 ± 0.01969 inch)	64.2 mm (2.52755 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	52° ± 1°	2.38 mm (0.09370 inch)	3.5 µm (137.80 µinch)
9Y-7507	10.0 mm (0.39370 inch)	48.5 ± 0.5 mm (1.90945 ± 0.01969 inch)	47.5 mm (1.87008 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	52° ± 1°	2.38 mm (0.09370 inch)	3.5 µm (137.80 µinch)
9Y-8978	N/A	64.0 mm (2.51968 inch)	63.0 mm (2.48031 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	N/A	N/A	3.5 µm (137.80 µinch)
9Y-9310	N/A	38.10 ± 0.25 mm (1.50000 ± 0.00984 inch)	35.10 mm (1.38189 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
9Y-9311	N/A	38.10 ± 0.25 mm (1.50000 ± 0.00984 inch)	35.10 mm (1.38189 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
9Y-9312	N/A	38.10 ± 0.38 mm (1.50000 ± 0.01496 inch)	36.10 mm (1.42126 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
9Y-9313	N/A	38.10 ± 0.38 mm (1.50000 ± 0.01496 inch)	36.10 mm (1.42126 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
9Y-9315	N/A	38.10 ± 0.25 mm (1.50000 ± 0.00984 inch)	35.10 mm (1.38189 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
101-3246	N/A	38.2 ± 0.25 mm (1.50393 ± 0.00984 inch)	37.32 mm (1.46929 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 in)	N/A	N/A	3.5 µm (137.80 µinch)
103-0712	9.55 mm (0.376 inch)	81.10 ± 0.25 mm (3.193 ± 0.010 inch)	80.10 mm (3.153 inch)	6.00 ± 1.00 mm (0.236 ± 0.040 inch)	N/A	N/A	3.5 µm (137.80 µinch)
107-0967	N/A	40.35 mm (1.589 inch)	40.05 mm (1.577 inch)	1.90 mm (0.075 inch)	N/A	N/A	3.5 µm (137.80 µinch)
113-6264	3.8 mm (0.14961 inch)	51.2 mm (2.01574 inch)	50.2 mm (1.97637 inch)	1.2 mm (0.04724 inch)	30° ± 10°	1.0 ± 0.2 mm (0.03937 ± 0.00787 inch)	3.5 µm (137.80 µinch)
117-4025	N/A	40.00 mm (1.575 inch)	39.70 mm (1.563 inch)	0.40 mm (0.016 inch)	N/A	N/A	3.5 µm (137.80 µinch)
118-0684	17.5 mm (0.69 inch)	44.70 ± 0.25 mm (1.759 ± 0.010 inch)	43.7 mm (1.72 inch)	1.60 mm (0.063 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10 degrees	10.0 µm (393.70 µinch)
119-4034	N/A	43.00 ± 0.25 mm (1.693 ± 0.010 inch)	42.00 mm (1.654 inch)	1.0 ± 0.5 mm (0.04 ± 0.02 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10 °	3.5 µm (137.80 µinch)
120-5298	N/A	38.00 mm (1.496 inch)	37.70 mm (1.484 inch)	0.40 mm (0.016 inch)	N/A	N/A	3.5 µm (137.80 µinch)
125-0157	N/A	46.30 ± 0.25 mm (1.823 ± 0.010 inch)	45.30 mm (1.783 inch)	0.80 ± 0.25 mm (0.0315 ± 0.010 inch)	0.80 ± 0.25 mm (0.0315 ± 0.010 inch)	27 ± 10	3.5 µm (137.80 µinch)
125-1276	N/A	49.8 ± 0.5 mm (1.96 ± 0.02 inch)	48.8 mm (1.92 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	N/A	N/A	10.0 µm (393.70 µinch)
126-5875	N/A	38.32 ± 0.25 mm (1.50866 ± 0.00984 inch)	37.32 mm (1.46929 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	N/A	N/A	3.5 µm (137.80 µinch)
126-8268	N/A	57.58 ± 0.25 mm (2.267 ± 0.010 inch)	56.58 mm (2.228 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
132-3141	9.50 mm (0.374 inch)	81.00 ± 0.25 mm (3.189 ± 0.010 inch)	80.0 mm (3.15 inch)	1.0 ± 0.5 mm (0.039 ± 0.020 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10 degrees	3.5 µm (137.80 µinch)
133-7123	36 mm (1.4 inch)	46 mm (1.8 inch)	45 mm (1.8 inch)	1.6 mm (0.06299 inch)	N/A	N/A	3.2 µm (125.98 µinch)
140-8056	N/A	40.1 ± 0.25 mm (1.57874 ± 0.00984 inch)	39.1 mm (1.53937 inch)	1.6 ± 0.4 mm (0.06299 ± 0.01575 inch)	30° ± 1°	0.8 ± 0.2 mm (0.032 ± 0.008 in)	3.5 µm (137.80 µinch)
144-9553	19.0 ± 0.25 mm (0.748 ± 0.010 inch)	66.51 ± 0.25 mm (2.619 ± 0.010 inch)	65.51 mm (2.579 inch)	0.80 ± 0.20 mm (0.032 ± 0.008 inch)	0.80 ± 0.20 mm (0.032 ± 0.008 inch)	30 ± 10	3.5 µm (137.80 µinch)
155-2671	2.8 mm (0.11 inch)	37.20 ± 0.25 mm (1.464 ± 0.010 inch)	36.2 mm (1.43 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10	3.5 µm (137.80 µinch)
158-5909	9.65 mm (0.379 inch)	95.92 ± 0.25 mm (3.776 ± 0.010 inch)	94.92 mm (3.737 inch)	1.00 ± 0.50 mm (0.03937 ± 0.01969 in)	0.80 ± 0.20 mm (0.031 ± 0.008 in)	27 ± 10 degrees	3.5 µm (137.80 µinch)
159-6016	N/A	66.76 ± 0.25 mm (2.628 ± 0.010 inch)	65.76 mm (2.589 inch)	N/A	N/A	N/A	N/A
160-8150	6.3 mm (0.24803 inch)	82.5 ± 0.25 mm (3.24803 ± 0.00984 inch)	81.5 mm (3.20866 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	52° ± 1°	2.38 mm (0.09370 inch)	3.5 µm (137.80 µinch)
160-8156	N/A	59.20 ± 0.25 mm (2.331 ± 0.010 inch)	58.20 mm (2.291 inch)	1.20 mm (0.047 inch)	1.00 ± 0.20 mm (0.039 ± 0.008 inch)	27 ± 10 °	6.0 µm (236.22 µinch)
160-8170	6.4 mm (0.25197 inch)	84.2 mm (3.31495 inch)	83.2 mm (3.27558 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	52° ± 1°	2.38 mm (0.09370 inch)	3.5 µm (137.80 µinch)
160-8193	30.00 mm (1.181 inch)	54.70 ± 0.25 mm (2.154 ± 0.010 inch)	53.70 mm (2.114 inch)	0.80 ± 0.50 mm (0.031 ± 0.020 inch)	2.38 mm (0.094 inch)	52 ± 1	3.5 µm (137.80 µinch)
160-8195	15.8 mm (0.62205 inch)	65.2 ± 0.5 mm (2.56692 ± 0.01969 inch)	64.2 mm (2.52755 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	52° ± 1°	2.38 mm (0.09370 inch)	3.5 µm (137.80 µinch)
160-8210	N/A	51.40 ± 0.25 mm (2.024 ± 0.010 inch)	50.40 mm (1.984 inch)	6.00 mm (0.236 inch)	N/A	N/A	3.5 µm (137.80 µinch)
163-0043	10.97 mm (0.432 inch)	81.9 mm (3.22 inch)	80.9 mm (3.19 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	N/A	N/A	3.5 µm (137.80 µinch)
163-0424	N/A	39.00 ± 0.25 mm (1.535 ± 0.010 inch)	38.00 mm (1.496 inch)	1.0 ± 0.5 mm (0.040 ± 0.020 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10	6.0 µm (236.22 µinch)
172-6481	N/A	108.93 mm (4.289 inch)	107.93 mm (4.249 inch)	0.80 ± 0.20 mm (0.032 ± 0.008 inch)	N/A	52 ± 1	3.5 µm (137.80 µinch)
187-8949	N/A	62.50 ± 0.50 mm (2.461 ± 0.020 inch)	61.50 mm (2.421 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
192-8813	30.00 mm (1.181 inch)	57.70 ± 0.50 mm (2.272 ± 0.020 inch)	56.70 mm (2.232 inch)	0.80 ± 0.50 mm (0.031 ± 0.020 inch)	2.38 mm (0.094 inch)	52 ± 1	3.5 µm (137.80 µinch)
195-0313	N/A	84.43 ± 0.13 mm (3.324 ± 0.005 inch)	83.43 mm (3.285 inch)	3.00 ± 0.50 mm (0.118 ± 0.020 inch)	N/A	N/A	6.0 µm (236.22 µinch)
198-3685	N/A	81.00 ± 0.25 mm (3.189 ± 0.010 inch)	80.00 mm (3.150 inch)	1.00 ± 0.50 mm (0.039 ± 0.020 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10	6.0 µm (236.22 µinch)
199-1368	9.60 mm (0.378 inch)	81.00 ± 0.25 mm (3.189 ± 0.010 inch)	80.00 mm (3.150 inch)	1.20 mm (0.047 inch)	1.00 ± 0.20 mm (0.039 ± 0.008 inch)	27 ± 10	10.0 µm (393.70 µinch)
200-7157	N/A	59.20 ± 0.25 mm (2.331 ± 0.010 inch)	58.20 mm (2.291 inch)	1.2 mm (0.05 inch)	1.00 ± 0.20 mm (0.039 ± 0.008 inch)	27 ± 10	3.5 µm (137.80 µinch)
200-7158	6.3 mm (0.24803 inch)	122.5 ± 0.25 mm (4.82282 ± 0.00984 inch)	121.5 mm (4.78346 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	52° ± 1°	2.38 mm (0.09370 inch)	3.5 µm (137.80 µinch)
202-2381	3.0 mm (0.11811 inch)	66.0 ± 0.25 mm (2.59842 ± 0.00984 inch)	65.0 mm (2.55905 inch)	1.0 ± 0.5 mm (0.03937 ± 0.01969 inch)	27° ± 1°	0.8 ± 0.2 mm (0.03150 ± 0.00787 inch)	3.5 µm (137.80 µinch)
202-2382	15.8 mm (0.62205 inch)	65.2 ± 0.5 mm (2.56692 ± 0.01969 inch)	64.2 mm (2.52755 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	52° ± 1°	2.38 mm (0.09370 inch)	3.5 µm (137.80 µinch)
202-2383	74.6 mm (2.93700 inch)	41.53 mm (1.63504 inch)	40.53 mm (1.59567 inch)	1.0 ± 0.5 mm (0.03937 ± 0.01969 inch)	N/A	N/A	3.5 µm (137.80 µinch)
205-6783	N/A	70.50 mm (2.776 inch)	70.20 mm (2.764 inch)	0.90 mm (0.035 inch)	N/A	N/A	3.5 µm (137.80 µinch)
205-6793	N/A	70.50 mm (2.776 inch)	70.20 mm (2.764 inch)	0.90 mm (0.035 inch)	N/A	N/A	3.5 µm (137.80 µinch)
208-9618	74.6 mm (2.93700 inch)	41.53 mm (1.63504 inch)	40.53 mm (1.59567 inch)	1.5 ± 0.5 mm (0.05906 ± 0.01969 inch)	N/A	N/A	3.5 µm (137.80 µinch)
211-0586	6.3 mm (0.24803 inch)	122.5 ± 0.25 mm (4.82282 ± 0.00984 inch)	121.5 mm (4.78346 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	52° ± 1°	2.38 mm (0.09370 inch)	3.5 µm (137.80 µinch)
213-3212	N/A	97.00 ± 0.25 mm (3.819 ± 0.010 inch)	96.00 mm (3.780 inch)	1.50 mm (0.059 inch)	N/A	N/A	3.5 µm (137.80 µinch)
216-2430	N/A	142.10 mm (5.594 inch)	141.20 mm (5.559 inch)	0.80 ± 0.20 mm (0.032 ± 0.008 inch)	0.80 ± 0.20 mm (0.032 ± 0.008 inch)	30 ± 1	3.5 µm (137.80 µinch)
218-1772	N/A	39.96 ± 0.25 mm (1.573 ± 0.010 inch)	38.96 mm (1.534 inch)	1.00 ± 0.50 mm (0.039 ± 0.017 inch)	0.80 ± 0.20 mm (0.032 ± 0.008 inch)	27 ± 10	3.5 µm (137.80 µinch)
220-1690	N/A	42.00 ± 0.25 mm (1.654 ± 0.010 inch)	41.00 mm (1.614 inch)	0.80 ± 0.50 mm (0.032 ± 0.020 inch)	N/A	52 ± 1	3.5 µm (137.80 µinch)
224-3240	N/A	107.43 mm (4.230 inch)	106.43 mm (4.190 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	N/A	52 ± 1	3.5 µm (137.80 µinch)
232-3225	N/A	55.00 mm (2.165 inch)	54.00 mm (2.126 inch)	1.50 mm (0.059 inch)	N/A	15 ± 1	3.5 µm (137.80 µinch)
234-4791	N/A	25.30 mm (0.996 inch)	25.10 mm (0.988 inch)	7.80 mm (0.307 inch)	N/A	N/A	3.5 µm (137.80 µinch)
236-2569	N/A	58.00 mm (2.283 inch)	57.00 mm (2.244 inch)	0.80 ± 0.20 mm (0.032 ± 0.008 inch)	N/A	52	3.5 µm (137.80 µinch)
236-4405	N/A	51.00 mm (2.008 inch)	50.00 mm (1.969 inch)	3.00 mm (0.118 inch)	N/A	N/A	N/A
236-4417	N/A	48.15 mm (1.896 inch)	47.15 mm (1.856 inch)	6.0 mm (0.24 inch)	N/A	N/A	N/A
236-4422	N/A	57.90 ± 0.25 mm (2.280 ± 0.010 inch)	56.90 mm (2.240 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	N/A	N/A	3.5 µm (137.80 µinch)
237-0229	N/A	62.50 ± 0.50 mm (2.460 ± 0.020 inch)	61.50 mm (2.421 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
251-2309	N/A	49.92 ± 0.25 mm (1.965 ± 0.010 inch)	48.92 mm (1.926 inch)	1.0 ± 0.5 mm (0.04 ± 0.02 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10	6.0 µm (236.22 µinch)
251-2314	N/A	46.60 ± 0.25 mm (1.835 ± 0.010 inch)	45.60 mm (1.795 inch)	1.00 ± 0.50 mm (0.039 ± 0.020 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10	3.5 µm (137.80 µinch)
252-5188	N/A	102.50 mm (4.035 inch)	101.50 mm (3.99606 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	52	3.5 µm (137.80 µinch)
256-4345	N/A	104.30 ± 0.50 mm (4.106 ± 0.020 inch)	103.30 mm (4.067 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
256-9652	N/A	43.00 ± 0.25 mm (1.693 ± 0.010 inch)	42.0 mm (1.65 inch)	1.0 ± 0.5 mm (0.04 ± 0.02 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10 degrees	3.5 µm (137.80 µinch)
256-9653	N/A	46.30 ± 0.25 mm (1.823 ± 0.010 inch)	45.3 mm (1.78 inch)	0.80 ± 0.25 mm (0.0315 ± 0.010 inch)	0.80 ± 0.25 mm (0.0315 ± 0.010 inch)	27	6.0 µm (236.22 µinch)
256-9661	N/A	75.00 ± 0.25 mm (2.953 ± 0.010 inch)	74.00 mm (2.913 inch)	1.60 mm (0.0639 inch)	0.80 ± 0.20 mm (0.032 ± 0.008 inch)	27 ± 10	3.5 µm (137.80 µinch)
257-5016	10.0 mm (0.39370 inch)	48.5 ± 0.5 mm (1.90945 ± 0.01969 inch)	47.5 mm (1.87008 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	52° ± 1°	2.38 mm (0.09370 inch)	3.5 µm (137.80 µinch)
265-7410	50.72 mm (1.997 inch)	55.98 ± 0.25 mm (2.204 ± 0.010 inch)	88.00 mm (3.465 inch)	1.50 ± 0.50 mm (0.059 ± 0.020 inch)	N/A	N/A	N/A
269-0312	N/A	62.66 ± 0.25 mm (2.467 ± 0.010 inch)	61.66 mm (2.428 inch)	1.00 ± 0.50 mm (0.039 ± 0.020 inch)	0.25 mm (0.010 inch)	27 ± 10	3.5 µm (137.80 µinch)
273-6559	N/A	72.00 ± 0.25 mm (2.835 ± 0.010 inch)	71.00 mm (2.795 inch)	N/A	N/A	N/A	N/A
275-0696	N/A	84.00 ± 0.25 mm (3.307 ± 0.010 inch)	83.00 mm (3.268 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
290-3280	N/A	43.00 ± 0.25 mm (1.693 ± 0.010 inch)	42.0 mm (1.65 inch)	1.0 ± 0.5 mm (0.040 ± 0.020 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10	3.5 µm (137.80 µinch)
303-3189	N/A	39.00 ± 0.25 mm (1.535 ± 0.010 inch)	38.00 mm (1.496 inch)	1.60 mm (0.063 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10	3.5 µm (137.80 µinch)
304-3686	N/A	39.00 ± 0.25 mm (1.535 ± 0.010 inch)	38.00 mm (1.496 inch)	1.60 mm (0.063 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10	3.5 µm (137.80 µinch)
304-8587	N/A	54.90 ± 0.25 mm (2.161 ± 0.010 inch)	53.90 mm (2.122 inch)	1.00 ± 0.50 mm (0.039 ± 0.017 inch)	0.80 ± 0.20 mm (0.032 ± 0.008 inch)	27 ± 10	3.5 µm (137.80 µinch)
311-7214	N/A	106.00 ± 0.25 mm (4.173 ± 0.010 inch)	105.00 mm (4.134 inch)	2.50 mm (0.098 inch)	N/A	N/A	10.0 µm (393.70 µinch)
344-7554	N/A	123.86 ± 0.25 mm (4.876 ± 0.010 inch)	122.86 mm (4.837 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
349-2638	45.93 mm (1.808 inch)	30.60 ± 0.25 mm (1.205 ± 0.010 inch)	29.60 mm (1.165 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	N/A	N/A	3.5 µm (137.80 µinch)
362-7866	N/A	89.00 ± 0.25 mm (3.504 ± 0.010 inch)	88.00 mm (3.465 inch)	1.50 ± 0.50 mm (0.059 ± 0.020 inch)	N/A	N/A	6.0 µm (236.22 µinch)
367-3326	N/A	58.2 ± 0.8 mm (2.29 ± 0.03 inch)	57.2 mm (2.25 inch)	2 ± 0.4 mm (0.079 ± 0.016 inch)	N/A	N/A	3.2 µm (125.98 µinch)
376-9131	N/A	104.30 ± 0.50 mm (4.106 ± 0.020 inch)	103.30 mm (4.067 inch)	N/A	N/A	N/A	3.5 µm (137.80 µinch)
417-9596	N/A	102.50 mm (4.035 inch)	101.50 mm (3.99606 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	52	3.5 µm (137.80 µinch)
432-0158	N/A	79.93 ± 0.13 mm (3.147 ± 0.005 inch)	78.93 ± 0.13 mm (3.107 ± 0.005 inch)	0.8 ± 0.2 mm (0.03 ± 0.008 inch)	1.5 ± 0.2 mm (0.06 ± 0.01 inch)	38 ± 10	3.5 µm (137.80 µinch)
438-9578	N/A	102.50 mm (4.035 inch)	101.50 mm (3.99606 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	52	3.5 µm (137.80 µinch)
475-9609	N/A	39.00 ± 0.25 mm (1.535 ± 0.010 inch)	38.00 mm (1.496 inch)	1.60 mm (0.063 inch)	0.80 ± 0.20 mm (0.031 ± 0.008 inch)	27 ± 10	3.5 µm (137.80 µinch)
482-9074	N/A	57.58 ± 0.25 mm (2.267 ± 0.010 inch)	56.58 mm (2.228 inch)	N/A	N/A	N/A	10.0 µm (393.70 µinch)
491-3151	9.55 mm (0.376 inch)	81.10 ± 0.25 mm (3.193 ± 0.010 inch)	80.10 mm (3.153 inch)	6.00 ± 1.00 mm (0.236 ± 0.040 inch)	N/A	N/A	3.5 µm (137.80 µinch)

Procedures for Inspecting Ring Gears

Inspection and Reconditioning

The wear on the ring gear is typically smooth under various loads. This smooth normal wear should occur over approximately two-thirds or more of the length of the ring gear tooth. Abnormal wear causes damage to the surface that is difficult and sometimes impossible to repair. Several types of abnormal wear include the following destructive objects:

• Pitting

• Scoring

• Frosting

• Spalling

• Corrosion

Replacement of ring gears often occurs because of abnormal wear.

Flywheel ring gears should be examined closely for any of the following conditions:

• Cracks

• Damaged dowel holes

• Abnormally worn ring gear teeth

• Broken ring gear teeth

It is important to check the geometry and orientation of the ring gear and teeth to maintain the critical dimensions (G), (H), (I), and (J). If any abnormal wearing occurs remove the ring gear and repair or replace the ring gear. Some ring gears with damage to the surface can be used again after the damaged area has been polished with a stone and oil.

Show/hide table

NOTICE
If the tooth has a raised metal area, remove only the raised portion on the tooth surface. Do not try to remove pitting or any other recessed surface damage. Do not use a grinder or power polisher; use only a hand-held stone. Using power tools to remove damage can also remove the case hardened surface of the ring gear, causing eventual failure.

Note: The minimum replacement limits for ring gears can be found in the chart of specifications for ring gears. If minimum repair limits are not met, the ring gear must be replaced.

Illustration 12	g06308842
Flywheel Ring Gear (G) Thickness (H) Inner Diameter (I) Root Diameter (J) Tip Diameter

Removal and Installation

Show/hide table

Always wear protective gloves when handling parts that have been heated.

Perform the following procedure if the ring gear needs to be removed from the flywheel for replacement or repair.

Note: Pay special attention to the orientation of the ring gear during removal because the new ring gear will need to be installed in the same orientation.

1. Place the flywheel and ring gear assembly on a suitable support.

2. Mark the orientation of the ring gear to the flywheel.

3. Heat the ring gear uniformly with a torch.

4. Remove the ring gear by tapping the ring gear all the way around the flywheel with a hammer and a punch.

5. Reposition the flywheel to remove the ring gear.

Perform the following procedures if the ring gear was removed from the flywheel.

1. Heat the ring gear to 150 °C (302.0 °F).

2. Press the ring gear onto the flywheel.

Specifications for Ring Gears

Table 5

Part Number	Number of Teeth	Minimum Replacement Limits
		G	H	I	J
2N-1599	126	15.04 mm (0.592 inch)	369.42 mm (14.544 inch)	N/A	404.37 mm (15.920 inch)
117-4026	126	15.00 mm (0.591 inch)	337.90 mm (13.303 inch)	355.91 mm (14.012 inch)	370.01 mm (14.567 inch)
205-6788	127	19.80 mm (0.780 inch)	352.00 mm (13.858 inch)	373.27 mm (14.696 inch)	386.77 mm (15.227 inch)
234-4792	126	17.45 mm (0.687 inch)	333.30 mm (13.122 inch)	N/A	360.17 mm (14.180 inch)

3500 & C175 Flywheels

Note: This inspection only applies to 334-8990 Flywheel, 370-6546 Flywheel, 370-6549 Flywheel, 373-2031 Flywheel, 437-6978 Flywheel, and 447-8850 Flywheel.

Internal flywheel spline teeth on C175-20 machine engines have occasionally been found to crack at overhaul. These failures have not caused any product downtime during normal use. However, it is critical to perform a magnetic particle inspection prior to any reuse or salvage efforts are performed. The use of magnetic particle inspection is more reliable than dye penetrant for this inspection procedure.

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Illustration 13	g03668452
Visually inspect flywheel teeth for damage.

1. Use a flashlight and visually inspect all the flywheel teeth for obvious visible damage. If damaged, then the flywheel cannot be reused and must be discarded.
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   Illustration 14	g03668911

2. Adjust hand yoke to inspect the teeth of the flywheel for damage. Place the yoke into position, turn on yoke, and apply magnetic particle solution to teeth between yoke legs.

   1. Spray solution only on section to be inspected, ensure that coverage is complete. Be sure to inspect part before solution runs off part to be inspected.

   2. Move yoke and repeat until 1/4 of the teeth have been magnetized and solution applied.

   3. Darken booth and with a black light inspect the 1/4 of teeth that were processed in Step 2b.
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   Illustration 15	g03669005
   Example of cracked flywheel teeth only seen using magnetic particle inspection.

3. If cracks or fractures are found, then the flywheel cannot be reused. If no cracks or fractures are found, then continue with the flywheel salvage procedure.

Machining Inspection

The purpose of this inspection is to identify any areas that might need salvage machining. This inspection is intended to be a more thorough inspection than the one performed during the cleaning cycle.

1. Inspect the external ring gear.

   Look for any severe damage that would warrant the ring gear to be replaced. If necessary the steps found in "Ring Gear Replacement" can help with this procedure.

2. Inspect for visual damage.

   Minor visual damage such as small dings and nicks can be machined or buffed out. Deep gouges can result in additional damage and should be discarded.

Bolt Hole Inspection

Machining Inspection

The purpose of this inspection is to identify any areas that might need salvage machining. This inspection is intended to be a more thorough inspection than the one performed during the cleaning cycle.

1. Inspect the external ring gear.

   Look for any severe damage that would warrant the ring gear to be replaced. If necessary the steps found in "Ring Gear Replacement" can help with this procedure.

2. Inspect for visual damage.

   Minor visual damage such as small dings and nicks can be machined or buffed out. Deep gouges can result in additional damage and should be discarded.

Bolt Hole Inspection

Salvage Machining

Ring Gear Replacement

This section will provide guidance if the ring gear is damaged and must be replaced.

1. Heat new ring gear in preheated oven to 150° C (300° F). The ring gear must reach proper temperature to be installed.

2. Remove original ring gear.

   1. Use a suitable lifting device, place flywheel on work surface dome side down. Wooden support blocks may be used under the flywheel for spacing.
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      Illustration 16	g03678091
      Removing ring gear

   2. Use an air hammer, drive damaged ring gear from the flywheel.

      Ensure that you move the air hammer continuously around the flywheel until the ring gear is removed. This procedure will ensure that the ring gear does not bind onto the flywheel.

3. Use a suitable lifting device and flip flywheel over, dome side up.

4. Wipe off the contact area of the flywheel with a lint free rag to ensure cleanliness.

5. Place new gear ring onto flywheel.

   Note: Make sure that the ring gear is installed in the correct direction to avoid damaging parts. Ensure that the groove side of the ring is facing upward during installation.

   Use protective gloves, remove gear ring from oven, and place onto flywheel. Ring gear should set in place and will cool rapidly, however it may be lightly tapped into place using a brass mallet if needed. If the gear is at the proper temperature, it will fit easily into place. Rotating the ring gear some during installation can help ensure a proper seat with the flywheel.

6. Spin check after cooling

   Attempt to spin the ring on the flywheel 5 minutes after installation. The ring must NOT spin freely. This step will ensure that the ring is properly seated on the flywheel.

Bolt Hole Repair

For bolt hole repairs on C175 Engines, refer to SEBF8882, "Using Lock-N-Stitch Procedures for Casting Repair".

Crack Detection Methods

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NOTICE
Regardless of which crack detection method is used, it is important that the instructions furnished with the detection equipment are followed closely when checking any component. Failure to do so may cause inaccurate results or may cause injury to the operator and/or surroundings.

Crack detection methods or Non-Destructive Testing (NDT) are utilized for examining components for cracks without damaging the component. Visual inspection (VT), Liquid Penetrant Testing (PT), Magnetic Particle Inspection (MT), Ultrasonic Testing (UT), Radiographic Testing (RT) and Eddy-Current Testing (ET) are recommended methods. There may be more than one acceptable crack detection method for the inspection of a given part, though the liquid penetrant is the most versatile. For example, the liquid penetrant method can be used when inspecting smooth machined components such as shafts, gear teeth, and splines, but using the Wet Magnetic Particle Inspection is more accurate. Refer to Table 6 for advantages and disadvantages and Table 7 for standards and requirements for these NDT methods.

Table 6

Crack Inspection Method Advantages vs. Disadvantages
Inspection Method	Advantages	Disadvantages
Visual Surface Inspection (VT)	- Least expensive - Detects most damaging defects - Immediate results - Minimum part preparation	- Limited to surface-only defects - Requires inspectors to have broad knowledge of welding and fabrication in addition to non-destructive testing
Liquid Penetrant (PT)	- Inexpensive - Minimal training - Portable - Works on nonmagnetic material	- Least sensitive - Detects surface cracks only - Rough or porous surfaces interfere with test
Dry Magnetic Particle (MT)	- Portable - Fast/Immediate Results - Detects surface and subsurface discontinuities	- Works on magnetic material only - Less sensitive than Wet Magnetic Particle
Wet Magnetic Particle (MT)	- More sensitive than Liquid Penetrant - Detects subsurface as much as 0.13 mm (0.005 inch)	- Requires Power for Light - Works on magnetic parts only - Liquid composition and agitation must be monitored
Ultrasonic Testing (UT)	- Most sensitive - Detects deep material defects - Immediate results - Wide range of materials and thickness can be inspected	- Most expensive - Requires operator training and certification - Surface must be accessible to probe
Eddy-Current Testing (ET)	- Surface and near surface flaws detectable -Moderate speed/Immediate results -Sensitive to small discontinuities	- Difficult to interpret - Only for metals -Rough surfaces interfere with test - Surface must be accessible to probe
Radiographic Testing (RT)	-Detects surface and internal flaws - Minimum part preparation - Can inspect hidden areas	- Not for porous materials - Radiation protection needed - Defect able to be detected is limited to 2% of thickness

Table 7

Applicable Crack Detection Standards
Inspection Method	Standard	Acceptance Criteria	Required Personnel Qualifications
Visual Surface Inspection (VT)	EN-ISO 5817 AWS D1.1	EN-ISO 5817 - Level B AWS D1.1 - Table 6.1	EN-ISO 9712 - Level 2 ANSI-ASNT SNT-TC-1A Level 2
Liquid Penetrant Testing (PT)	EN-ISO 3452 ASTM E165	EN-ISO 23277 AWS - D1.1	EN-ISO 9712 - Level 2 ANSI-ASNT SNT-TC-1A Level 2
Magnetic Particle Testing (MT)	EN-ISO 17638 ASTM E709	EN-ISO 23278 - Level 1 AWS D1.1 - Table 6.1	EN-ISO 9712 - Level 2 ANSI-ASNT SNT-TC-1A Level 2
Ultrasonic Testing (UT)	EN-ISO 17640 - Level B AWS D1.1	EN-ISO 11666 Technique 2 - Level 2 AWS D1.1 - Class A - Table 6.3	EN-ISO 9712 - Level 2 ANSI-ASNT SNT-TC-1A Level 2
Eddy-Current Testing (ET)	EN-ISO 15549 ASTM E426	EN-ISO 20807	EN-ISO 9712 - Level 2 ANSI-ASNT SNT-TC-1A Level 2
Radiographic Testing (RT)	EN-ISO 5579 ASTM E94	EN-ISO 10657-1	EN-ISO 9712 - Level 2 ANSI-ASNT SNT-TC-1A Level 2

Visual Surface Inspection (VT)

Illustration 17	g06085008
Example of Visual Inspection Tools (A) Flashlight or adequate light source (B) Magnifying eye loupe (C) Tape measure or other measuring device (D) Inspection mirror (E) Weld size inspection gauges

Components and welds that are to be inspected using PT, MT, or UT shall first be subject to Visual Surface Inspection (VT). Visual Inspection is often the most cost-effective inspection method and requires little equipment as seen in Illustration 17. It is suggested that at a minimum personnel performing Visual Inspection are either trained to a company standard or have sufficient experience and knowledge regarding the components being inspected. It is also suggested that personnel performing visual inspections take some type of eyesight test regularly.

Liquid Penetrant Testing (PT)

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Personal injury can result from improper handling of chemicals. Make sure you use all the necessary protective equipment required to do the job. Make sure that you read and understand all directions and hazards described on the labels and material safety data sheet of any chemical that is used. Observe all safety precautions recommended by the chemical manufacturer for handling, storage, and disposal of chemicals.

Materials and Equipment Required

Refer to Tooling and Equipment Table 3 for part numbers.

• Cleaner: Removes dirt before dye application and dissolves the penetrant making possible to wipe the surface clean.

• Penetrant: This solution is highly visible, and will seep into openings at the surface of a part with capillary action.

• Developer: Provides a blotting action, bringing the penetrant out of the discontinuities and providing a contrasting background to increase the visibility of the penetrant indications.

• Wire Brush: Removes dirt and paint.

• Cloth or Wipes: Use with cleaner and for other miscellaneous uses.

Procedure

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Illustration 18	g06107074
Typical example of pre-cleaning area.

1. Preclean inspection area. Spray on cleaner / remover to loosen any scale, dirt, or any oil. Wipe the area to inspect with a solvent dampened cloth to remove remaining dirt and allow the area to dry. If there is visible crack remove paint using paint remover or wire brush.
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   Illustration 19	g06107081
   Typical example of applying penetrant.

2. Apply penetrant by spraying to the entire area to be examined. Allow 10 to 15 minutes for penetrant to soak. After the penetrant has been allowed to soak, remove the excess penetrant with clean, dry wipe.
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   Illustration 20	g06107088
   Typical example of removing excess penetrant oil.

3. The last traces of penetrant should be removed with the cleaner solvent dampened cloth or wipe. Allow the area to dry thoroughly.
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   Illustration 21	g06107094
   Typical example of applying developer.

4. Before using Developer, ensure that it is mixed thoroughly by shaking can. Holding can approximately 203.20 - 304.80 mm (8.00 - 12.00 inch) away from part, apply an even, thin layer of developer over the area being inspected. A few thin layers are a better application method than one thick layer.
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   Illustration 22	g06084042
   Typical example of cracks found during a liquid penetrant testing.

5. Allow the developer to dry completely for 10–15 minutes before inspecting for cracks. Defects will show as red lines in white developer background, refer to Illustration 22. Clean the area of application of the developer with solvent cleaner.

Dry Magnetic Particle Testing (MT)

Materials and Equipment Required

Refer to Tooling and Equipment Table 3 for part numbers.

Illustration 23	g06085930
(A) Indications shown by magnetic particle testing. (B) Typical electromagnetic yoke. (C) Dry powder bulb.

1. Dry magnetic powder shall be of high permeability and low retentively and of suitable sizes and shapes to produce magnetic particle indications. The powder shall be of a color that will provide adequate contrast with the background of the surface being inspected.

2. Dry magnetic particles shall be stored in suitable containers to resist contamination such as moisture, grease, oil, non-magnetic particles such as sand, and excessive heat. Contaminants will manifest in the form of particle color change and particle agglomeration. The degree of contamination will determine further use of the powder.

3. Dry magnetic powder shall be tested in accordance with ASTM E709 Section 18 (Evaluation of System Performance/Sensitivity) when not performing.

4. Equipment should include a "U" shaped electromagnetic yoke made from highly permeable magnetic material, which has a coil wound around the yoke. This coil carries a magnetizing current to impose a localized longitudinal magnetic field into the part. The magnetizing force of the yoke is related to the electromagnetic strength and can be tested by determining the lifting power of a steel plate. The yoke shall have a lifting force of at least 4.5 kg (10 lbs).

5. Check dry powder blower routinely to ensure that the spray is a light, uniform, dust-like coating of the dry magnetic particles. Blower should also have sufficient force to remove excess particles without disturbing those particles that are evidence of indications.

6. All equipment shall be inspected at a minimum of once a year or when accuracy is questionable.

Procedure

1. Ensure surface to be inspected is dry and free from oil, grease, sand, loose rust, mil scale, paint, and other contaminants.

2. Apply the magnetic field using the yoke against the faces and inside diameter of each bore.

3. Simultaneously apply the dry powder using the dry powder blower.

4. Remove excess powder by lightly blowing away the dry particles.

5. Continue around the entire circumference of each bore. Position the yoke twice in each area at 1.57 rad (90°) to ensure that multiple directions of the magnetic field are created.

6. Observe particles and note if any clusters of particles appear revealing an indication.

7. Record the size and shape of any discontinuities or indications found.

Wet Magnetic Particle Testing (MT)

Materials and Equipment

Refer to Tooling and Equipment Table 3 for part numbers.

Illustration 24	g06085937
(A) Indications shown by magnetic particle testing. (B) Typical electromagnetic yoke. (D) UV Lamp used in wet magnetic particle inspection process.

Illustration 25	g06003178
Pear Shaped Centrifuge Tube

1. Wet magnetic particles are fluorescent and are suspended in a vehicle in a given concentration that will allow application to the test surface by spraying.

2. Concentration:

   1. The concentration of the suspended magnetic particles shall be as specified by the manufacturer and be checked by settling volume measurements.

   2. Concentrations are determined by measuring the settling volume by using an ASTM pear shaped centrifuge tube with a 1 mL (0.034 oz) stem with 0.05 mL (0.0017 oz) 1.0 mL (0.034 oz) divisions, refer to Illustration 25. Before sampling, the suspension shall be thoroughly mixed to assure suspension of all particles, which could have settled. A 100 mL (3.40 oz) sample of the suspension shall be taken and allowed to settle for 30 minutes. The settling volume should be between 0.1 mL (0.0034 oz) and 0.25 mL (0.0085 oz) in a 100 mL (3.40 oz) sample.

   3. Wet magnetic particles may be suspended in a low viscosity oil or conditioned water.

   4. The oil shall have the following characteristics:

      • Low viscosity not to exceed 50 mSt (5.0 cSt) at any temperature at which the vehicle is to be used.

      • Low inherent fluorescence and be non-reactive.

   5. The conditioning agents used in the conditioned water shall have the following characteristics:

      • Impart good wetting characteristics and good dispersion.

      • Minimize foaming and be non-corrosive.

      • Low viscosity shall not exceed a maximum viscosity of 50 mSt (5.0 cSt) at 38° C (100° F).

      • Non-fluorescent, non-reactive, and odorless.

      • Alkalinity shall not exceed a pH of 10.5.

3. Equipment should include a "U" shaped electromagnetic yoke made from highly permeable magnetic material, which has a coil wound around the yoke. This coil carries a magnetizing current to impose a localized longitudinal magnetic field into the part. The magnetizing force of the yoke is related to the electromagnetic strength and can be tested by determining the lifting power of a steel plate. The yoke shall have a lifting force of at least 4.5 kg (10 lbs).

Procedure

1. Ensure surface to be inspected is dry and free from oil, grease, sand, loose rust, mil scale, paint, and any other contaminants.

2. Apply the magnetic field using the yoke against the surface in the area to be inspected.
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   Illustration 26	g03536210

3. For case hardened and ground surfaces:

   • Due to the sensitivity required to locate the grinding cracks, inspection of case hardened and ground surfaces require that the yoke is applied so that the magnetic field is 1.57 rad (90°) to the expected direction of the indications. Also, due to the increased sensitivity resulting when the yoke is energized, the yoke is not moved until the evaluation is completed in the first direction. An AC yoke shall be used. See Illustration 26 for an example of yoke placement.

4. Visually inspect for indications of discontinuities using the proper illumination.

5. Record the size and shape of any discontinuities found.

Ultrasonic Testing (UT)

Note: Crack depth cannot be accurately determined by UT, only full depth cracking can be consistently determined. For cracks that are not full depth, an indication of a partial depth cracks can be detected by an experienced technician.

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NOTICE
All personnel involved in ultrasonic testing shall be qualified to Level 2 in accordance to standards stated in Table 7.

Refer to Tooling and Equipment Table 3 for part numbers.

1. Ultrasonic Testing (UT) is a method of Non-Destructive Testing (NDT) using short ultrasonic pulse waves (with frequencies from 0.1-15 MHz up to 50 MHz) to detect the thickness of the object. Ultrasonic testing consists of an ultrasound transducer connected to a diagnostic machine and passed over the object being inspected.

2. There are two methods of receiving the ultrasound waveform from the transducer: reflection and attenuation.

   1. Reflection - Ultrasonic pulses exit the transducer and travel throughout the thickness of the material. When the sound waves propagate into an object being tested, the waves return to the transducer when a discontinuity is discovered along the sonic path. These waves continue and reflect form the backsurface of the material to project the thickness of the material.

   2. Attenuation - A transmitter sends ultrasound through one surface, and a separate receiver detects the amount that has reached it on another surface after traveling through the medium. Any discontinuities or other conditions within the medium will reduce the amount of sound transmitted, revealing the presence of the imperfections.

Eddy-Current Testing (ET)

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NOTICE
All personnel involved in Eddy-Current Testing shall be qualified to Level 2 in accordance to standards stated in Table 7.

Illustration 27	g06090873
Eddy-Current Testing

Eddy-Current Testing (ET) is a Non-Destructive Testing (NDT) method in which eddy-current flow is induced in the test object. Changes in the flow caused by variations in the specimen are reflected in to a nearby coil or coils for subsequent analysis by suitable instrumentation and techniques. Major applications of eddy-current testing are surface inspection and tubing inspections.

Radiographic Testing (RT)

Note: CAUTION: This process is dangerous. Only qualified personnel and test equipment should be appointed to perform this type of testing.

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NOTICE
All personnel involved in radiographic testing shall be qualified to Level 2 in accordance to standards stated in Table 7.

Illustration 28	g06090892
Radiographic Testing

Radiographic Testing (RT) is a Non-Destructive Testing (NDT) method in which short wavelength of electromagnetic radiation is used to penetrate materials to find hidden discontinuities such as cracks. In radiographic testing, the test object is placed between the radiation source and the film, or x-ray detector. The electromagnetic radiation will penetrate the thickness of the test object and, when all the way through, will project onto the film any indications that have been in the path of the radiation waves.