- Caterpillar Products
- All Cat Engines
Introduction
Revision | Summary of Changes in SEBF8068 |
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26 | Added new serial number prefixes / C175 Cuffed Liner information |
25 | Photos added to show allowable liner pitting |
24 | Combined information from SEBF8164, SEBF8247, SEBF8817, SEBF9122, SEBF9194, added 60 part numbers and repaired 9 pixelated illustrations |
© 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.
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
NOTICE |
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Due to a change in honing techniques, Caterpillar can no longer recommend re-honing as a salvage procedure. Improvements in emissions strategy have included a proprietary honing technique known as plateau honing. Plateau honing requires specialized tooling and multiple stage honing process to complete. In a salvage situation, the material removal needed to reestablish the hone pattern on a worn liner will make the liner bore oversized and the wall too thin for reuse. Caterpillar does allow for liners to be cleaned, inspected, measured, and reused if they meet all the criteria in this guideline. |
Replacing cylinder liners is not always necessary during an engine rebuild. The installation of used cylinder liners can result in a large decrease in the cost of the rebuild. This guideline incorporates information on cleaning and inspecting cylinder liners. Use the criteria in this guideline and other applicable guidelines to determine the reusability of a liner.
Follow the cleaning and inspection information in this guideline completely. This information can be used to determine reusability. Never reuse a cylinder liner this guideline recommends should not be used again. If a cylinder liner has damage not shown in this guideline, then do not use the cylinder liner again. Liners that meet these guidelines are expected to give normal performance until the next overhaul.
Information in this guideline is based on the liner removed from the engine. With the liner out of the engine, a thorough inspection of all liner and cylinder block surfaces can be performed. Also, the liner seals must be replaced as a measure for preventive maintenance.
If the liners have cuff rings the rings should be replaced at overhaul. Cuff rings that are still tight in the bore may be reused if the cylinder is being inspected prior to overhaul.
Service Letters and Technical Information Bulletins
NOTICE |
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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
References | |
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Media Number | Title |
GMG00981 | Special Instruction, "Using 1P-3537 Dial Bore Gauge Group to Check Cylinder Bore Size" |
, NEHS0632 | Tool Operating Manual, "Procedures For Using the 120-9143 Cylinder Wash Tank Gp" |
, SMHS8253 | Special Instruction, "Use of the 6V-7898 Dial Bore Gauge" |
, SMHS8254 | Special Instruction, "Using the 6V-7899 Size Setting Fixture Group" |
Tooling and Equipment
NOTICE |
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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. |
Tooling and Equipment | |
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Part Number | Description |
Dial Bore Gauge | |
Nylon Bristle Brush
|
|
Nylon Bristle Brush
|
|
Dial Indicator | |
M16 Washer | |
Dial Indicator | |
Dial Gauge | |
Nylon Bristles
|
|
Nylon Bristle Brush
|
|
Nylon Bristle Brush
|
|
Nylon Bristle Brush
|
|
Nylon Bristle Brush
|
|
Nylon Bristle Brush
|
|
Nylon Bristle Brush
|
|
Nylon Bristle Brush
|
|
Nylon Bristle Brush
|
|
Flashlight | |
Indicator Base | |
Indicator Contact Point | |
Dial indicator Fixture | |
Micrometer Depth Gauge | |
Adapter | |
Micrometer | |
Dial Bore Gauge | |
Size Fixture | |
Dial Indicator | |
Dial Indicator | |
Washer | |
M16 x 2 Bolt | |
Sac Hole Drill | |
Eye Loupe | |
Indicator Gauge | |
Dial Caliper | |
Dial Indicator Group | |
Scotch Brite Pad | |
Inspection Mirror | |
Brush Extension | |
Cylinder Wash Tank | |
Nylon Bristle Brush
|
|
Cordless Drill | |
Air Drill | |
Microscope, Pocket
40x |
|
Crack Detection Kit | |
Paper Towel | |
Depth Micrometer Kit | |
Digital Caliper | |
Indicator Gauge Group | |
Straight Edge Ruler | |
Ultrasonic Tool Group | |
Suitable Cribbing | |
Digital Caliper
|
|
Micrometer, External |
|
Spring Tester | |
UV Lamp Group | |
Micrometer, Outside
0.00 - 4.00 inch |
|
Micrometer, Outside
2.00 - 6.00 inch |
|
Micrometer, Outside
|
|
Micrometer, Outside
|
|
Degreaser | |
Light Table |
Top Mounted Liners
Illustration 3 | g06290127 |
(1) Fire dam
(2) Inside surface (3) Outside surface (4) O-ring seal grooves (5) Filler band groove (6) Flange |
Mid Mounted Liners
Illustration 4 | g03520081 |
(1) Liner Sleeve
(2) Inside surface (3) Outside Surface (4) O-ring seal grooves |
Procedure to Clean Liners
Prior to inspecting the cylinder liners, the liners must be cleaned thoroughly inside and out. Cleaning the liner requires a strong cleaning solvent or detergent, a nylon brush, and rust preventative.
Note: The following information applies to cylinder liners that are being prepared for inspection. Never store liners in a dirty condition as corrosion or rusting of machined surfaces may occur. Always store liners upright, storing the liners on their side will cause liners to deform into an out of round state.
If Using Cat Nylon Bristle Brushes
Illustration 5 | g06180533 |
(A) Nylon Brush
(B) |
Illustration 6 | g02031657 |
Nylon brush used to clean liners |
If Cat nylon bristle brushes are used to clean a bores, a
- To use the 4C-4426 Extension (B), cut the twisted wire handle off nylon bristle brush (A) to the length needed to perform the task.
- Slide the twisted wire handle into extension .
- Use the two set screws to hold the brush in place.
Cleaning Interior Surfaces
- Remove all O-ring seals that may still be on the liner. Clean all the surfaces that held the seals with a nonmetallic material for reconditioning surfaces, such as a soft abrasive pad or nylon brush that does not contain iron oxide. All deposits of material such as scale or rust must be removed from the areas of the seals. There are two acceptable methods of cleaning a cylinder liner. The use of either a hydraulic cylinder wash tank with rotating nozzles and brush or a solution of water and cleaner with a nylon cylinder brush.
- Use a hydraulic wash tank.
One method of cleaning is to use the 120-9143 Cylinder Wash Tank to clean inside the cylinder liners. This wash tank group is typically used for the internal cleaning of hydraulic cylinders. The washer uses a rotating head that has both fluid nozzles directing the cleaning solution at the bore and brushes to scrub the inner surface. The machine also has a system for filtering that cleans the solution before recirculating the solution back through the nozzles.
Follow the instructions that are contained in the Tool Operating Manual. Refer to Tool Operating Manual, NEHS0632, "Procedures For Using the 120-9143 Cylinder Wash Tank Gp".
- Use detergent and nylon brush.
Another procedure is to use a strong detergent solution, water, and a nylon brush with a hand drill. Refer to Illustration 6 for an example of a cylinder liner cleaning brush. Typically a brush size
25.40 mm (1.00 inch) larger than the inside diameter of the liner bore, will provide the best cleaning results.Refer to Tables 7 and 8 to find the appropriate sized brush needed.
Mix a fresh solution of water and a liquid cleaner such as Hydrosolv 4165. Place the liner in a large container of cleaning solution. Support the cylinder liner so that the cylinder liner is open at the bottom. Clamp the large nylon brush into the hand drill to scrub the inside of liner for 1 to 2 minutes. Run the brush up and down through the liner in an aggressive manner to clean the inner surface. Do not allow the brush to contact the bottom of the container.
Note: A liquid detergent without chlorine content, that is mixed in hot water is a good cleaning solution. 486-1526 5 gal Cleaner HYDROSOLV 4165 will produce the same cleaning action as liquid soap. For liners with a heavy coating of lacquer, add butyl cellusolv to the soap solution.
- For protection of the surface that will last for two to three weeks against rust, do not rinse the part after using Hydrosolv 4165. If Hydrosolv 4165 is not used, then rinse the liner. Rinse the cylinder liner with clean, hot water, and treat the cylinder liner with rust preventive or a thin film of engine oil. Do not allow the liner to air dry slowly after rinsing. Use pressurized air to dry the liner immediately.
Show/hide tableIllustration 7 g02032995 Use a white cloth to see if the liner is clean. A gray color is an indication that dirt or debris is still present. - Use a hydraulic wash tank.
- Check the cylinder liner for cleanliness by wiping the bore of the cylinder liner with a clean white cloth or a paper towel that is free of lint. If there are any signs of dirt or residue, clean the liner again.
Note: Failure to remove all debris from a liner bore will result in decreased life of the piston ring and lack of adequate control of oil.
- Freshly cleaned surfaces will begin to rust if the surfaces are not protected. Put a thin layer of engine oil or other rust preventive over the clean, dry liner immediately. Without protection, a clean liner can show rust in minutes. Prior to storage, protect the cylinder liner from other contaminants such as dust or dirt after treating the cylinder liner with rust preventive. Remove the rust preventive only if further inspection is necessary or the liner is being installed into an engine.
Personal injury can result when using cleaner solvents. To help prevent personal injury, follow the instructions and warnings on the cleaner solvent container before using. |
Cleaning Exterior Surfaces
Remove any rust or foreign deposits from the outside surface of the liner. To clean the outside surface of the liner, use glass beads and a bead cabinet or a brass or nylon brush. Take caution not to damage the inside of the liner, the top of the flange, and the bottom of the flange when cleaning the outside of the liner.
NOTICE |
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Prefered use of glass or soda blast should only be done on the outside of the liner. It is not allowed to use Abrasive media like Sand, Silica in blasting cabinets. Do not blast the inside of the liner including the cuff counterbore |
Visual Inspection
To perform an accurate inspection, the cylinder liner must be cleaned thoroughly prior to inspecting.
Outside Surface
Illustration 8 | g02004824 |
Rust and deposits must be removed before the visual inspection. Clean the liner again. |
O-Ring Groove Area
Illustration 9 | g02006654 |
There is a small chip in the area between the grooves. Reuse the liner if the chip is not extended across the complete area and any burrs or sharp edges are removed with a file. |
If the liner has pits between the seal grooves and the filler band groove and the pits are deeper than
Illustration 10 | g02006694 |
Reuse the liner. The exception would be if the outside of the liner has pits or erosion that goes into either of the lower two seal grooves. (1) Light erosion (2) Pits |
Cracking
Illustration 11 | g02006774 |
Crack Do not reuse the liner. |
Illustration 12 | g06290408 |
Cracking that occurs on the cylinder cuff Do not reuse the liner. |
Pitting
Used liners will generally have some minor pitting caused by the coolant as it flows from the front to the rear of the engine.
Illustration 13 | g06376639 |
Small pits are acceptable only if the pits are limited to one or two sides. |
Illustration 14 | g02006857 |
Small pits are acceptable only if the pits are limited to one or two sides. Reuse the liner if there are pits on only one side. |
C175 Liner Pitting in Seal Grooves, minor pitting is allowed. Measure pitting depth as shown in the Pitting Measurement section in this document for reference.
Illustration 15 | g06376638 |
C175 Liner Pits shown on lower section of O-Ring groove |
Illustration 16 | g06376641 |
C175 Liner Pits shown on lower section of O-Ring groove |
Illustration 17 | g06376642 |
C175 Liner Pits shown on lower section of O-Ring groove |
Small pits are also acceptable if the liner was removed with the pits toward the front or rear of the engine. If the liner is to be reused, then rotate the liner 90° so the non-pitted parts of the liner face the coolant flow.
Illustration 18 | g03554498 |
Deep pits Do not reuse liners with deep pits. |
Illustration 19 | g02006934 |
Deep pits Do not reuse liners with deep pits. |
Pitting Measurement
To check the depth of a pit, grind an 8S-2251 Drill or a
Illustration 20 | g02007072 |
Modified (3) Lip (4) Radius (A) Depth of section to grind |
Dimensions of the Modified Drill | |
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(A) | (4) |
|
|
Illustration 21 | g02007054 |
Flange Area
Illustration 22 | g03566667 |
Visible crack extending from inside liner into flange area Do not reuse the liner. |
Illustration 23 | g02008133 |
Pits and erosion in the filler band groove. Do not reuse the liner. |
Illustration 24 | g02008254 |
Do not reuse the liner. |
Illustration 25 | g02008298 |
Reuse the liner. |
There are pits and fretting under the liner flange. Large pits or groups of pits are not acceptable. Circumferential fretting is the only acceptable fretting. The fretting must not prevent the liner from sealing. Measure flange thickness.
Illustration 26 | g02008418 |
Small pits Reuse the liner. |
Illustration 27 | g06290417 |
Crack in the flange. Do not reuse the liner. |
Do not reuse any liner that has circumferential cracks under the area of the liner flange. Do not reuse any liner with cracks in the flange fillet.
Illustration 28 | g02008619 |
Damage to the fire dam. Reuse the liner. |
The damage must not extend across the fire dam. Burrs or sharp edges must be removed.
Illustration 29 | g02008647 |
Damage in the surface area of the gasket Do not reuse the liner. |
Illustration 30 | g02008657 |
Nick in the vertical flange Reuse the liner. |
Remove any sharp edges or high areas with a file.
Illustration 31 | g02008696 |
Chip in the seal edge of the flange. Do not reuse the liner. |
Inside Surface Inspection
Use the FT1711 Light Table to check for scratches and pits on the inside surface of the liner bore. The fluorescent light will work better than the incandescent light when you inspect the bore.
If the pits or light spots of rust that occur on the insideofthe cylinder liner are directly opposite to the pits on the outside surface, then the liner should not be used again. This type of pitting can go through the walls of the cylinder liner and into the bore.
Illustration 32 | g02020854 |
Light Table |
Illustration 33 | g01842838 |
Example of good clean cross hatch. |
Illustration 34 | g02020874 |
Pits on the inside surface Do not reuse the liner. |
Illustration 35 | g02022540 |
Crack on the inside surface Do not reuse the liner. |
Illustration 36 | g02022546 |
Deep grooves on the inside surface Do not reuse the liner. |
Illustration 37 | g02022941 |
Heavy rust on the inside surface Do not reuse the liner . |
Illustration 38 | g02022949 |
Water spots on the inside surface. Do not reuse the liner |
Illustration 39 | g02023415 |
Shiny areas on the inside surface, no visible cross hatch remains. Do not reuse the liner. |
Illustration 40 | g02023523 |
Water rings and spots on the inside surface. Do not reuse the liner. |
Illustration 41 | g02023538 |
Deep double wear step on the inside surface Do not reuse the liner. |
Crack Detection Methods
After cleaning and a visual inspection, liners should be checked for cracks that may not be readily visible. If a cylinder liner is cracked at any location, then do not use the cylinder liner again.
NOTICE |
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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 5 for advantages and disadvantages and Table 6 for standards and requirements for these NDT methods.
Crack Inspection Method Advantages vs. Disadvantages | ||
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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 |
- 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 |
Applicable Crack Detection Standards | |||
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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 42 | 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 42. It is suggested that at a minimum personnel performing Visual Inspection are either trained to a company standard or have sufficient experience and knowledge with regard to the components being inspected. It is also suggested that personnel performing visual inspections take some type of eyesight test regularly.
Liquid Penetrant Testing (PT)
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. |
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.
- Brush: Removes dirt and rust.
- Cloth or Wipes: Use with cleaner and for other miscellaneous uses.
- 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.
Show/hide table
Illustration 44 g06107081 Typical example of applying penetrant. - 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.
Show/hide table
Illustration 45 g06107088 Typical example of removing excess penetrant oil. - The last traces of penetrant should be removed with the cleaner solvent dampened cloth or wipe. Allow the area to dry thoroughly.
Show/hide table
Illustration 46 g06107094 Typical example of applying developer. - 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.Show/hide tableIllustration 47 g06084042 Typical example of cracks found during a liquid penetrant testing. - 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 47. Clean the area of application of the developer with solvent cleaner.
Illustration 43 | g06107074 |
Typical example of pre-cleaning area. |
Dry Magnetic Particle Testing (MT)
Refer to Tooling and Equipment Table 3 for part numbers.
Illustration 48 | g06085930 |
(A) Indications shown by magnetic particle testing.
(B) Typical electromagnetic yoke. (C) Dry powder bulb. |
- 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.
- 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.
- Dry magnetic powder shall be tested in accordance with ASTM E709 Section 18 (Evaluation of System Performance/Sensitivity) when not performing.
- 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) . - 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.
- All equipment shall be inspected at a minimum of once a year or when accuracy is questionable.
- Ensure surface to be inspected is dry and free from oil, grease, sand, loose rust, mil scale, paint, and other contaminants.
- Apply the magnetic field using the yoke against the faces and inside diameter of each bore.
- Simultaneously apply the dry powder using the dry powder blower.
- Remove excess powder by lightly blowing away the dry particles.
- 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.
- Observe particles and note if any clusters of particles appear revealing an indication.
- Record the size and shape of any discontinuities or indications found.
Wet Magnetic Particle Testing (MT)
Refer to Tooling and Equipment Table 3 for part numbers.
Illustration 49 | g06085937 |
(A) Indications shown by magnetic particle testing.
(B) Typical electromagnetic yoke. (D) UV Lamp used in wet magnetic particle inspection process. |
Illustration 50 | g06003178 |
Pear Shaped Centrifuge Tube |
- 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.
- Concentration:
- The concentration of the suspended magnetic particles shall be as specified by the manufacturer and be checked by settling volume measurements.
- Concentrations are determined by measuring the settling volume by using an ASTM pear shaped centrifuge tube with a
1 mL (0.034 oz) stem with0.05 mL (0.0017 oz) 1.0 mL (0.034 oz) divisions, refer to Illustration 50. Before sampling, the suspension shall be thoroughly mixed to assure suspension of all particles, which could have settled. A100 mL (3.40 oz) sample of the suspension shall be taken and allowed to settle for 30 minutes. The settling volume should be between0.1 mL (0.0034 oz) and0.25 mL (0.0085 oz) in a100 mL (3.40 oz) sample. - Wet magnetic particles may be suspended in a low viscosity oil or conditioned water.
- 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.
- 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.
- 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) .
- Ensure surface to be inspected is dry and free from oil, grease, sand, loose rust, mil scale, paint, and any other contaminants.
- Apply the magnetic field using the yoke against the surface in the area to be inspected.
- 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.
- Visually inspect for indications of discontinuities using the proper illumination.
- 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.
NOTICE |
---|
All personnel involved in ultrasonic testing shall be qualified to Level 2 in accordance to standards stated in Table 6. |
Refer to Tooling and Equipment Table 3 for part numbers.
- 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.
- There are two methods of receiving the ultrasound waveform from the transducer: reflection and attenuation.
- 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.
- 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)
NOTICE |
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All personnel involved in Eddy-Current Testing shall be qualified to Level 2 in accordance to standards stated in Table 6. |
Illustration 51 | 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.
NOTICE |
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All personnel involved in radiographic testing shall be qualified to Level 2 in accordance to standards stated in Table 6. |
Illustration 52 | 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.
Cylinder Liner Specifications
Note: Cylinder liners with dimensions that are outside the ranges that are shown in Tables 7 and 8 should not be reused.
Liners that have passed all the "Visual Inspection" criteria must be measured to ensure they can be reused. Use precise gauges of known accuracy to measure the cylinder liner bore to check if the cylinder liner is worn beyond the specification. Critical dimensions for cylinder liners are listed in Tables 7 and 8. If the liner has the specified dimensions and the crosshatched pattern is still visible throughout the liner bore, then the liner may be reused.
The following specifications are for cylinder liners at a temperature of
Bore diameters should be measured with a dial bore gauge that has been accurately calibrated with a master ring or a fixture for setting the gauge.
Record the part number of the cylinder liner and the sequence numbers for the inspection process. Keep a log of history or a permanent record by sequence number of the cylinder liner for any measurements that are taken for future reference.
Critical Dimensions for Top Mounted Liners
Illustration 53 | g06290427 |
Typical dimensions for top mounted liners. Some liners will not have all these features. (A) Thickness of Liner Flange (B) Height of Fire Dam (C) Diameter of Liner Sleeve Bore (D) Height of Liner Sleeve Bore (E) Diameter of Liner Bore |
Illustration 54 | g06290433 |
Example of a bore cooled liner. (A) Thickness of Liner Flange (B) Height of Fire Dam (E) Diameter of Liner Bore (F) Width of the top Seal Ring Groove |
Use the following reference table for measuring the cylinder liners.
Critical Dimensions for Top Supported Liners | ||||||
---|---|---|---|---|---|---|
Liner Part Number | A | B | C | D | E | F |
|
|
N/A | N/A | |
N/A | |
|
|
N/A | N/A | |
|
|
|
|
N/A | N/A | |
N/A | |
|
|
N/A | N/A | - |
N/A | |
|
|
N/A | N/A | - |
N/A | |
|
|
N/A | N/A | - |
N/A | |
|
|
|
|
|
N/A | |
|
|
N/A | N/A | - |
N/A | |
|
|
|
|
|
N/A | |
|
|
N/A | N/A | - |
N/A | |
|
|
N/A | N/A | - |
N/A |
Critical Dimensions for Mid Mounted Liners
Illustration 55 | g06290437 |
Typical dimensions for mid mounted liners. Some liners will not have all of these features. (A) Thickness of Liner Flange (B) Height of Fire Dam (C) Diameter of Liner Sleeve Bore (D) Height of Liner Sleeve Bore (E) Diameter of Liner Bore |
Critical Reuse Dimensions for Mid Supported Liners | |||||
---|---|---|---|---|---|
Liner Part Number | A | B | C | D | E |
|
|
N/A | N/A | - |
|
|
|
N/A | N/A | - |
|
|
|
N/A | N/A | - |
|
|
|
N/A | N/A | - |
|
|
|
N/A | N/A | - |
|
|
N/A | |
|
- |
Flange Thickness for Top Supported Liners
Measure the thickness of the flange with a micrometer. Thickness of the flange must meet the dimensions in Table 7 for reuse.
Illustration 56 | g02020697 |
Flange Thickness for Mid-Supported Liners
Measure the thickness of the mid-support with an outside micrometer. The thickness of the mid-support must meet the dimensions in Table 8 for reuse.
Illustration 57 | g06290442 |
(A) Mid-support thickness |
Measuring Liner Bore
Before measuring the liner bore, the liner must first have passed a complete visual inspection. The measuring of the liner bore is to determine if the liner is out of round. Maximum reuse specifications can be found within Tables 7 and 8.
Gauges For Measuring
Illustration 58 | g06290448 |
Typical example of dial bore gauge set. |
Bore diameters should be measured with a dial bore gauge that has been accurately calibrated with a master ring or a fixture for setting the gauge.
For instructions on how to use a dial bore gauge set, refer to Special Instruction, SMHS8253, "Use of the 6V-7898 Dial Bore Gauge". Use the 1P-3537 Dial Bore Gauge.
Record the part number of the cylinder liner and the sequence numbers for the inspection process. Keep a log of history or a permanent record by sequence number of the cylinder liner for any measurements that are taken for future reference.
Measuring Procedure
Illustration 59 | g06290453 |
Typical diameter measuring locations. |
Measure the bore of the cylinder liner at three points on the horizontal plane that are 45° apart. Repeat this measuring procedure three separate times on the vertical plane. The measurements should be taken at the top end of the stroke, the middle, and the lower end of the stroke. Refer to Illustration 59.
Illustration 60 | g01838754 |
Measure the inside diameter of the liner with a dial bore gauge. |
If all the measurements of the bore are acceptable according to Tables 7 and 8, then the liner can be used again.
- Determine the wear of the diameter of the cylinder liner bore by taking three sets of measurements that are 45° from each other in three different locations in the cylinder liner. One set of measurements should be taken at the upper end of the cylinder liner at the point of the maximum wear. The second set of measurements should be taken in the middle of the liner. The last set of measurements should be taken at the lower end of the liner. Record this information for future reference.
- It is important to maintain the dimensions that are listed in Tables 7 and 8.
Liner Storage
Storage of the cylinder liners requires some special attention to avoid destroying a reusable liner.
- Always protect the liners in storage.
- Never store liners in a dirty condition as this practice will accelerate rusting and corrosion of the machined surface.
- Always use a rust preventative or a light film of clean engine oil to protect the clean liner.
- Never store the liner on its side. Doing so will gradually deform the liners into an out of round shape.