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Introduction
Revision | Summary of Changes in SEBF8200 |
---|---|
10 | Corrected ID of new bearing cage tolerance for |
09 | Added safety graphic. |
08 | Updated introduction and added Canceled Part Numbers section. Added 773G, 775G, 777G, and 789D to Table 3, and updated effectivity. |
07 | Added 773E to effectivity. |
© 2018 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 include canceled part numbers and replaced part numbers. Use the Numerical Part Record (NPR) on the Service Information System Website (SIS Web) 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, you must 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.
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”. Refer to Illustration 2 for an example of a “WARNING” Safety Alert Symbol.
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, 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.
References
References | |
---|---|
Media Number | Publication Type & Title |
Channel1 | "Gear Tooth Inspection" |
https://channel1.mediaspace.kaltura.com/media/Gear+Tooth+Inspection/1_5ujdi5zp | |
"Why Reuse and Salvage Parts" | |
https://channel1.mediaspace.kaltura.com/media/Why+Reuse+and+Salvage+Parts/0_ae9rhu2z | |
Oerlikon Metco Contact | www.oerlikon.com/metco |
PERJ1017 | Special Publication
"Dealer Service Tools Catalog" |
SEBF2178 | Reuse and Salvage Guidelines
"Thermal Spray Procedures for OHT Cage - Bearing" |
SEBF8187 | Reuse and Salvage Guidelines
"Standardized Parts Marking Procedures" |
SEBF9236 | Reuse and Salvage Guidelines
"Fundamentals of High Velocity Oxygen Fuel (HVOF) Spray for reconditioning Components" (1) |
SEBF9238 | Reuse and Salvage Guidelines
"Fundamentals of Arc Spray for reconditioning Components" (1) |
SEBF9240 | Reuse and Salvage Guidelines
"Fundamentals of Flame Spray for Reconditioning Components" (1) |
(1) | Only Cat dealers may utilize applications for Thermal Spray. The processes must be carried out within the facilities of the dealership. The dealership must maintain a clean environment and always use the correct equipment for all processes in each Thermal Spray Application. |
Service Advisories, Service Letters, and Technical Service Bulletins
The most recent Service Advisories, Service Letters, and Technical Service Bulletins that are related to this component should be reviewed before beginning work. Often Service Advisories, Service Letters, and Technical Service Bulletins contain upgrades in repair procedures, parts, and safety information which pertain to the components being repaired.
Tooling and Equipment
Note: The Tooling and Equipment in Table 3 is not an all inclusive list of Tooling required to perform every task within this document. Tooling needs may vary for the scope of work to be performed for each specific rebuild.
This list of machines and tooling is a recommended list. The salvage procedure can also be completed by using equivalent machinery.
Required Tooling and Equipment | ||
---|---|---|
Part Number | Description | Designation |
(1) | Personal Protective Equipment (PPE) | Personal Protection |
Tools (Micrometer)
Internal |
Internal
Measurement Checks |
|
Caliper
Digital |
Measurement
Checks |
|
Micrometers
External |
External
Measurement Checks |
|
or |
Instrument Group
Micrometer, Inside 2.00 - 12.00 inch |
Internal
Measurement Checks |
Instrument Group
Micrometer, Inside 50 - 300 mm |
||
Tool Group
Dial Indicator |
Total Indicator Reading (TIR) | |
Metal Marking Pen | Parts Marking | |
Carbide Burr | Deburring | |
— | Deburring Tool | Deburring |
Flashing Lights Conversion Kit | Visual Surface
Inspection (VT) |
|
Light | Visual Surface
Inspection (VT) |
|
— (1) | Bright Incandescent Light | Visual Surface
Inspection (VT) |
Paper Towel | General Cleaning | |
Towel | General Cleaning | |
— | Lathe with |
Machining |
— | Boring Bar | Machining |
— | Inserts for boring bar | Machining |
— | Equipment for Shot Blasting | Thermal Spray Preparation |
— | Aluminum Oxide (20 grit) | Shot Blasting |
— | Aluminum Tape | Thread Protection |
— (3) | Oerlikon Metco Equipment for Thermal Spray | Thermal Spray Operations |
— (3) | Oerlikon Metco 453 powder | Thermal Spray Operations |
— (3) | Oerlikon Metco anti-bond or layout dye | Thermal Spray Operations |
(1) | Refer to PERJ1017Special Publication, "Dealer Service Tools Catalog" for Personal Protective Equipment (PPE) part numbers suitable by geographic location and local safety standards. |
(2) | Available in the United States only. |
(3) | Contact Oerlikon Metco. |
Preparation for Salvage Procedure
The differential bearing cage needs to be thoroughly cleaned to remove all oil, grease, and debris prior to starting the"Salvage Procedure".
Illustration 3 | g01287663 |
Bearing cage after cleaning. |
After cleaning, the cage should be measured using inside micrometers to determine the size, the out of round, and the taper of the bore.
Illustration 4 | g01287729 |
Measuring for taper, size and out of roundness. |
Illustration 4 is an example of taking measurement at the top of the bore.
Illustration 5 | g01287748 |
Measure the cage at the top and the bottom of bore. Also, measure the cage in various locations around the diameter (90° away from each other). |
Illustration 5 is an example of taking a measuring at the bottom of the bore.
Illustrations 4 and 5 give examples of measuring at locations 90° away from each other.
Salvage Procedure
- After the cage has been measured, the cage should be put in a lathe for machining. Machine the inside diameter to a cleanup and eliminate any out of round or taper. After machining, clean the cage again.
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Illustration 7 g01287798 Bearing cage after cleanup. - Measure the inside diameter for size after cleanup.
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Illustration 8 g01287803 Protect the threads with aluminum tape before shot blasting. - Protect the threads of the bearing cage with aluminum tape. Place the bearing cage in shot blasting equipment and use Aluminum Oxide (20 grit) to prepare the inside diameter for metal spray.
Note: After shot blasting the inside diameter, the surface should not be touched prior to the application of thermal spray. Oil and grease will contaminate the surface, which will result in reduced adhesion of sprayed powder.
Show/hide tableIllustration 9 g01287805 The top surface of the bearing cage is protected for the procedure of thermal spray. - Carefully use Oerlikon Metco anti-bond to coat the top face of the bearing cage. This step will eliminate any adhesion of the metal powder to the surface. Make sure that only the top surface is coated.
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Illustration 10 g01287807 Metal spray is being applied. - Mount the bearing cage in a lathe or on a rotating table. Apply flame spray to the inside diameter of the cage by using equipment for thermal spray. The diameter must be built up to
1.0 mm (0.04 inch) below the mean dimension of the cage.Refer to Table 4 for dimensions and tolerances and SEBF2178Reuse and Salvage Guidelines, "Thermal Spray Procedures for OHT Cage - Bearing". for parameters and settings of the equipment for thermal spray.
Show/hide tableTable 4 Inside Diameter of Bearing Cage Part
NumberDescription New Bearing Cage
Inside DiameterInside Diameter
After Thermal SprayChamfer Dimensions 2D-9459 Bearing Cage Ø 190.564 ± 0.025 mm (7.5025 ± .0010 inch) Ø 191.580 mm (7.5425 inch) 1.5 mm (0.06 inch) at 30°3D-9553 Bearing Cage Ø 215.964 ± 0.025 mm (8.5025 ± 0.0010 inch) Ø 216.980 mm (8.5425 inch) 1.5 mm (0.06 inch) at 30°5T-5967 Bearing Cage Ø 268.352 ± 0.025 mm (10.5650 ± 0.0010 inch) Ø 269.367 mm (10.6050 inch) 1.5 mm (0.06 inch) at 30°5T-5966 Bearing Cage Ø 222.314 ± 0.025 mm (8.7525 ± 0.0010 inch) Ø 223.330 mm (8.7925 inch) 1.5 mm (0.06 inch) at 30°8W-9447 Bearing Cage Ø 311.240 ± 0.025 mm (12.2535 ± 0.0010 inch) Ø 312.255 mm (12.2935 inch) 1.5 mm (0.06 inch) at 30°105-8584 Bearing Cage Ø 228.549 ± 0.04 mm (8.9980 ± 0.0016 inch) Ø 227.533 mm (8.9580 inch) 1.5 mm (0.06 inch) at 30°203-3995 Bearing Cage Ø 225 ± 0.02 mm (8.85825 ± 0.00079 inch) Ø 211.016 mm (8.3077 inch) 1.5 mm (0.06 inch) at 45° - Allow the bearing cage to cool and remove tape from the threads before machining.
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Illustration 11 g01288733 Jaws have been bored to correct size. - Make sure that jaws of the chuck are bored correctly for the outside diameter of the bearing cage. Machining the jaws of the lathe to the same diameter as the bearing cage will cause equal pressure to be exerted on the outside diameter.
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Illustration 12 g01287810 The outside diameter is being checked with a dial indicator. Show/hide tableIllustration 13 g01287953 The face is being checked with a dial indicator. - Place the bearing cage in a lathe. Zero set a dial indicator on the outside diameter and the end face. Rotate one revolution to measure total indicator reading. The maximum for the total indicator reading is
0.127 mm (0.0050 inch) .Show/hide tableIllustration 14 g01288745 Boring bar is installed on the lathe and ready to make cleanup cut. - Use the boring bar and make a cleanup cut.
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Illustration 15 g01288755 Machine the bearing cage to the inside diameter of a new bearing cage which is specified in Table 4. Note: Care must be taken to control the depth of the boring bar. Do not damage the threads at the bottom of the cut.
Show/hide tableIllustration 16 g01288925 Make sure that the depth of the cut does not damage the threads. - Use inside micrometers and measure the diameter of the bore. Machine the bore to the inside diameter of a new bearing cage that is given in Table 4.
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Illustration 17 g01288934 The edge of the bearing cage should be chamfered and the edge of the bearing cage should be deburred. Show/hide tableIllustration 18 g01314756 The dimensions for the chamfer that are shown above are listed in Table 4.
(1) Depth of the chamfer
(2) Angle of the chamfer and location of the chamfer - Use the boring bar or the tool for chamfering to cut a chamfer on the bearing cage. Deburr the bearing cage and remove the bearing cage from the lathe. Dimensions for the chamfer are shown in Illustration 1 and given in Table 4.
Illustration 6 | g01287794 |
Bearing cage is being held in the chuck of the lathe. |