cellulose friction material

7/24/2019 Cellulose Friction Material

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13/11/2015 Búsqueda del medio - SEBF8115 - Transmission Clutch Plates and Disc Assemblies with Cellulose Fri ction Material 3030, 3155, 3190

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Pantalla anterior

Bienvenido: r080emProducto: NO SE HA ESCOGIDO NINGUN EQUIPOModelo: NO SE HA ESCOGIDO NINGUN EQUIPOConfiguración: NO SE HA ESCOGIDO NINGUN EQUIPO

Pautas de reutilización y recuperación

Transmission Clutch Plates and Disc Assemblies with Cellulose Friction Material 3030, 3155,3190Número de medio -SEBF8115-18 Fecha de publicación -27/03/2014 Fecha de actualización -12/11/2015

Caterpillar: Confidential Yellow

i0603573

Transmission Clutch Plates and Disc Assemblies with Cellulose

Friction Material 3030, 3155, 3190

SMCS - 3030; 3155; 3190

Agricultural Tractor65 (S/N: 7YC1-UP)65B (S/N: 7YC1-UP)65C (S/N: 2ZJ1-UP)

65D (S/N: 2ZJ1965-UP)

65E (S/N: 1GM1-UP; 6GS1-UP)70C (S/N: 2YL1-UP)75 (S/N: 4CJ1-UP)75C (S/N: 4KK1-UP)

75D (S/N: 5AR1-UP)75E (S/N: 1HM1-UP; 6HS1-UP)85C (S/N: 9TK1-UP)85D (S/N: 4GR1-UP)

85E (S/N: 1NM1-UP; 6JS1-UP)95E (S/N: 1SM1-UP; 6KS1-UP)

Articulated Truck 725 (S/N: WWA1-UP; B1L1-UP; AFX1-UP)

725C (S/N: TFB1-UP)730 (S/N: WWB1-UP; AGF1-UP; B1M1-UP)735 (S/N: B1N1-UP; AWR1-UP)D20D (S/N: 9MG1-UP)

D250B (S/N: 5WD1-UP)D250D (S/N: 6NG1-UP)D250E (S/N: 5TN1-UP)D250E Series II (S/N: 4PS1-UP)

D25C (S/N: 9YC1-UP)




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D25D (S/N: 1HK1-UP)D300B (S/N: 4SD1-UP)D300D (S/N: 5MG1-UP)

D300E (S/N: 7FN1-UP)D300E Series II (S/N: 5KS1-UP)D30C (S/N: 7ZC1-UP)D30D (S/N: 3AJ1-UP)

D350C (S/N: 8XC1-UP)

D350D (S/N: 9RF1-UP)D35C (S/N: 2GD1-UP)

Backhoe Loader

AllEarthmoving Compactor

AllEngine

7211 (S/N: 1YB1-UP)7221 (S/N: 1ZB1-UP)

Integrated ToolcarrierAll

Landfill CompactorAll

Load Haul DumpR1300 (S/N: 6QW1-UP)R1300G (S/N: LJB1-UP)

R1300G Series II (S/N: RSL1-UP)Motor Grader

AllOn-Highway Transmission

All

Petroleum TransmissionAllPipelayer

AllSoil Compactor

AllTrack-Type Loader

931 (S/N: 10N1-UP; 78U1-UP)931B (S/N: 4SC1-UP; 6EC1-UP; 25Y1-UP; 26Y1-UP; 29Y1-UP; 30Y1-UP)931C (S/N: 6RF1-UP; 7HF1-UP; 8AF1-UP; 5LG1-UP; 2BJ1-UP)931C Series II (S/N: 9AG1-UP; 6AJ1-UP; 2AK1-UP)

933 (S/N: 8FL1-UP; 9EL1-UP)935B (S/N: 3DF1-UP)935C (S/N: 8CF1-UP)935C Series II (S/N: 5DJ1-UP)939 (S/N: 9GL1-UP)

941 (S/N: 70H1-UP; 80H1-UP; 16U1-UP)941B (S/N: 70H1-UP; 80H1-UP)951 (S/N: 79H1-UP; 86J1-UP)951B (S/N: 79H1-UP; 86J1-UP)

951C (S/N: 86J1-UP)





955 (S/N: 61H1-UP; 64J1-UP)955K (S/N: 61H1-UP; 85J1-UP)

955L (S/N: 64J1-UP; 85J1-UP; 13X1-UP)977 (S/N: 46H1-UP)977K (S/N: 46H1-UP; 48J1-UP; 11K1-UP)977L (S/N: 48J1-UP; 11K1-UP; 14X1-UP; 64X1-UP; 95X1-UP)

Track-Type SkidderAll

Track-Type TractorAll

TransmissionAll OEM Transmissions

Truck Engines7155 (S/N: 56K1-UP; 72S1-UP)

Wheel Dozer814B (S/N: 16Z1-UP)814F (S/N: BGF1-UP; 9DM1-UP)814F Series 2 (S/N: BXG1-UP)

824G Series II (S/N: AWW1-UP)

824H (S/N: ASX1-UP)834B (S/N: 7BR1-UP; 92Z1-UP)834H (S/N: BTX1-UP)834S (S/N: 96G1-UP)

834U (S/N: 14B1-UP)844H (S/N: BTW1-UP)854G (S/N: AMP1-UP; A4W1-UP; 1JW1-UP)854K (S/N: 2211-UP; H9K1-UP; H8M1-UP)

Wheel LoaderAll

Wheel SkidderAll

Wheel Tractor-Scraper611 (S/N: 6SZ1-UP; 7WZ1-UP)613 (S/N: 71M1-UP; 72M1-UP)613B (S/N: 72M1-UP; 38W1-UP)

613C (S/N: 92X1-UP; 93X1-UP)613C Series II (S/N: KEH1-UP; 8LJ1-UP; TJK1-UP; LCZ1-UP)613G (S/N: ESB1-UP; DBE1-UP)615 (S/N: 46Z1-UP; 47Z829-1531)615C (S/N: 5TF1-UP; 2XG1-UP)

615C Series II (S/N: 9XG1-UP)

Introduction

Table 1

Revision Summary of Changes in SEBF8115

18 Added 11 part numbers.

17 Added serial number prefixes and 41 part numbers.





16 Added one part number.

© 2015 Caterpillar All Rights Reserved. This guideline is for the use of Cat dealers only. Unauthorizeduse 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 isknown to Caterpillar. Continuing improvement and advancement of product design might have causedchanges to your product which are not included in this publication. This Reuse and Salvage Guidelinemust be used with the latest technical information that is available from Caterpillar.

For questions or additional information concerning this guideline, submit a form for feedback in theService Information System. To address an urgent issue, use the following resources to communicateyour request to Caterpillar Repair Process Engineering:

Caterpillar Dealer Technical Communicator

Dealer Solution Network

Caterpillar Technical Representative

Knowledge Network

Canceled Part Numbers and Replaced Part Numbers

This document may 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 partnumbers for replaced parts.

Summary

It is not always necessary to install new components when you recondition a transmission. Theinstallation of used components can result in large reductions in repair costs. This guideline gives visualcriteria to reuse clutch discs with cellulose friction material and the clutch plates that mate to the clutch

discs.

Never install a part that should not be used again according to the specifications in this document. Sometypes of cellulose friction material will wear grooves in surfaces in contact with the cellulose frictionmaterial. The friction material will only have a small amount of wear. The discs can be used againwithout reconditioning if none of the following damage exists:

Scratches

Discoloration





Warp

Dish

NOTICE

Keep the clutch discs for individual clutches in their original sequenceand with their respective clutch housings. The original clutch discs are

made from different material for different clutches and must not bemixed.

Note: Be sure that the correct type of oil is used in the transmission. The additives that are in some oilsattack the material for friction on the discs. The additives may result in greatly reduced operating life.

Procedures to recondition scratched surfaces or lightly pitted faces of reaction are given in this guideline.Also, specifications for the maximum amount of warp and dish are given. Do not use any other methodof cleaning or reconditioning. Do not use any of the following methods:

Machining with a lathe

Clean with grit or glass beads

Clean with abrasive pads for reconditioning

Any method that changes the surface finish of the face of reaction can cause rapid wear of the frictionmaterial. Correct any conditions that caused the original failure during reconditioning.

Note: Transmission discs are made with friction material. Cellulose friction material is used for discs.

RAYFLEX friction material is used for discs. Cellulose discs are similar in appearance to RAYFLEXdiscs. Cellulose discs and RAYFLEX discs have different criteria for reusability. This guideline givesreusability information for cellulose discs only.

Important Safety Information

Work safely. Most accidents that involve product operation, maintenance, and repair are caused byfailure 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 hazardwarnings are not heeded, bodily injury or death could occur to you or to other persons. Caterpillar cannotanticipate every possible circumstance that might involve a potential hazard. Therefore, the warnings inthis publication and the warnings that are on the product are not all inclusive. If a tool, a procedure, awork method, or operating technique that is not recommended by Caterpillar is used, ensure that it is safefor 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.





Illustration 1 g02139237

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 onthis 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 warningsare 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.


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 allinclusive. Determine that the tools, procedures, work methods, and operating techniques are safe.

Determine that the operation, lubrication, maintenance, and repair procedures will not damage themachine. Also, determine that the operation, lubrication, maintenance, and repair procedures willnot make the machine unsafe.

The information, the specifications, and the illustrations that exist in this guideline are based oninformation 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 canaffect the service that is given to the product. Obtain the complete, most current information before youstart any job. Caterpillar dealers can supply the most current information.

When replacement parts are required for this product Caterpillarrecommends using Caterpillar replacement parts or parts with

equivalent specifications including, but not limited to, physicaldimensions, type, strength and material.

Failure to heed this warning can lead to premature failures, productdamage, personal injury or death.

References

Reference: : Reuse and Salvage Guideline, SEBF8014, "Identification and Applications of TransmissionClutch Plates and Specifications to Machine Reaction Faces for Power Shift Transmissions"

Glossary

Chipped - Areas of friction material are broken off the disc assemblies.

Discoloration - Change in color

Dished - Bent in the radial direction

Erosion - The condition that includes deterioration or breakage of the friction material on the land edgesof friction discs

Glazed - The condition that includes the development of a smooth layer on the friction material that issimilar in appearance to glass

Mating - Parts that operate together through contact

Nick - Small notch

Warp - Twisted out of shape





Disc Assembly

Identification

This document should only be used for the intended specific components. This document should only beapplied to discs in planetary sets for power shift transmissions. Caterpillar uses several different types of friction material on clutch plates. As a rule, assume that each type of friction material requires a different

surface finish for the face of reaction. Each type of friction material has different wear characteristics andfailure modes.

The following section identifies the features of clutch discs with cellulose friction material.


The illustration shows a pattern for cellulose friction material.






The pattern of parallel grooves is used for cellulose friction material.





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The pattern of parallel grooves is pressed o r embossed and not cut.

The cellulose friction material that is used on transmission discs is dark gray or nearly black. Cellulosefriction material is similar in appearance to RAYFLEX friction material. Illustration 3 and Illustration 4show patterns of grooves. Cellulose discs use only these patterns of grooves. Neither of these patternswere used for RAYFLEX or F37 friction material.

Cleaning Friction Material

Chlorinated solvents, diesel fuel, kerosene, and petroleum distillates can be used to clean discs with

cellulose friction material. Petroleum distillates include Stoddard solvent and naphtha. Cellulose frictionmaterial is porous. Incorrect materials for cleaning or processes can damage cellulose material. Incorrectmaterials for cleaning or processes can cause a premature failure.

Follow the following precautions:

1. Do not use solvents that have a higher temperature than 38 °C (100 °F).

2. Minimize the time of contact between solvents and discs.

3. Use towels or compressed air to dry the discs after washing.

4. To avoid chipping of friction material, do not stack discs after the cleaning.

Do not use any of the following types of cleaning materials. Do not permit the following materials for cleaning to come in contact with the cellulose friction material. These materials will weaken the basematerial. These materials will cause the base material to break up in operation.

Water or steam

Water-based cleaning solutions such as 1U-5490 Cleaner and 174-6855 Cleaner.





Freon

Thinner for paint

Ketones, aldehydes such as MEK and acetone

Visual Inspection

Cracks and Grooves

After the transmission has been disassembled, carefully clean, dry, and inspect each disc assembly. Anydisc assembly that has a crack or deep grooves cannot be used again. Look for teeth that have been

broken or cracked. Inspect the friction surfaces for radial cracks or deep grooves.


The illustration shows a friction disc with cracks.

DO NOT USE THIS PART AGAIN.

Handling Damage

Some damage to transmission discs may occur due to rough handling (contact with hard, sharp objects).The discs may be reused if the discs meet the following criteria:

Discs are not easily damaged during normal handling.

A maximum of six damaged areas are permitted per face.

The area of handling damage on any face is 100 mm2 (0.16 inch2) or less.






This disc has excessive damage from handli ng. The maximum allowed area of damage from handling on an y face is

100.0 mm2 (0.16 inch2). The area of damage on the disc in Illustration 8 is 123.0 mm2 (0.16 inch2).


Erosion


Light erosion on the edges of the lands is shown on the disc.

USE THIS PART AGAIN.





Illustration 10 g03784038Excessive erosion is shown on the face of the di sc.


Damage from Water

Exposure of the transmission discs to water and antifreeze as a result of cooler failure in the core,vandalism, accidentally immersing the machine, etc. This will result in shortened service life. Since thelength of contact can often be extensive, replace the discs.

Bond Failure

Overheating of the friction surfaces, exposure to contaminated lube oil, or other incompatible materialscan weaken the bond between the friction material and the steel core. The bond may be weak if materialis chipped off the core during normal handling.






Note that the friction material was chipped cleanly from the core of the disc on top. The friction material was no t chipped

cleanly on the top d isc.


This part should not be used again due to the weak bond.

Glazing

Excessive clutch slippage generates heat. Heat can cause surfaces on the discs to become glazed. The

glazing causes a reduced coefficient of friction. The reduced coefficient of friction causes additionalslippage and finally complete clutch failure. Glazing can be identified by a shiny appearance of thefriction material. Glazing can cover the entire surface or glazing may be in the bands. The normal surfacehas a porous appearance. No glazing is permitted.






Glazing of the surface is shown in the ill ustration.


Do not use this part again due to glazing of the surface.

Tooth Wear

Disc assemblies should be inspected for tooth wear. Some tooth wear is acceptable. If notches are worninto the teeth, the disc should never be used.


The illustration shows notches that are worn into the teeth.

(1) A notch is worn into a tooth.

(2) Normal Tooth Surface







The illustration shows shallow wear but no obvio us wear step.

(3) Shallow wear but no obvious wear step

(4) Normal Tooth Surface


Measurement of Face Wear and Disc Thickness

Excessively worn faces on discs can cause two types of problems:

Insufficient stack height

The restriction of the flow of oil for cooling because of the reduction of the oil groove depth.

Use a micrometer to measure the thickness at several places around the inner edges of the disc and theouter edges of the disc. Do Not Reuse a disc that is below the minimum thickness that is shown in Table

2.

Note: Both sides of the disc should have the same amount of wear. Do Not Reuse a disc if the faces arenot worn equal amounts.

Table 2

Wear Limits for Cellulose Friction Discs

Part Number New Disc Thickness Minimum Thickness

432-54697.0 ± 0.13 mm(0.28 ± 0.005 inch)

6.10 mm(0.240 inch)

238-7603, 313-49525.61 ± 0.08 mm (0.22 ± 0.003 inch) 4.88 mm (0.192 inch)

233-9748

9W-2152, 6Y-7959 5.59 ± 0.08 mm (0.22± 0.003 inch)

4.95 mm

7G-3129, 6Y-5911, 328-4374





157-8412 5.59 ± 0.10 mm (0.22 ± 0.004 inch) (0.19488 inch)

301-3676

370-9775

8P-8679, 6Y-5916 5.56 ± 0.08 mm (0.21 ± 0.003 inch) 4.92 mm (0.19 inch)

375-0273 5.41 ± 0.13 mm (0.213 ± 0.0051 inch)

4.36 mm

(0.1716 inch)

140-2371, 222-5203 5.18 ± 0.08 mm (0.203 ± 0.003 inch) 4.54 mm (0.18 inch)

321-9609 5.08 ± 0.13 mm (0.200 ± 0.005 inch) 4.44 mm (0.175 inch)

234-6707 4.98 ± 0.10 mm (0.20 ± 0.004 inch) 4.38 mm (0.17 inch)

8P-9293, 3T-9960

4.95 ± 0.08 mm (0.20 ± 0.003 inch)

4.37 mm (0.17 inch)3T-4026, 8P-9294, 3T-9961

7T-3456

3T-6220, 6Y-79254.32 mm(0.17008 inch)

355-2618 4.95 ± 0.08 mm (0.20 ± 0.003 inch)4.52 mm (0.18 inch)

343-8739

4.95 + 0.08 - 0.13 mm(0.20 + 0.003 - 0.005 inch)

246-8779

4.37 mm (0.17 inch)6Y-5352

3T-1407

4.95 ± 0.10 mm (0.20 ± 0.004 inch)

4.32 mm (0.17 inch)

7T-1554, 6Y-8087 4.26 mm (0.17 inch)

187-8921

4.57 mm (0.18 inch)8P-8680, 6Y-2027

168-3513

2S-4983, 8P-8681, 6Y-5348

4.67 mm (0.18 inch)

9P-1861, 6Y-5912, 328-4375 4.37 mm (0.17 inch)

370-9778

355-2617 4.95 ± 0.13 mm (0.19 ± 0.005 inch) 4.52 mm (0.18 inch)

166-0673





4.80 ± 0.08 mm (0.19 ± 0.003 inch) 4.22 mm (0.17 inch)177-6766

7T-5726

4.70 ± 0.18 mm (0.19 ± 0.007 inch)

4.06 mm (0.16 inch)

3W-4329, 6Y-93723.93 mm(0.15472 inch)

9N-1683, 6Y-7930

4.67 ± 0.13 mm (0.18 ± 0.005 inch) 4.16 mm (0.16 inch)9N-1684, 6Y-7931

8P-8683, 6Y-5915 4.65 ± 0.08 mm (0.18 ± 0.003 inch) 4.37 mm (0.17 inch)

9G-8913, 6Y-7983 4.55 ± 0.08 mm (0.17913 ± 0.00315 inch) 4.05 mm (0.16 inch)

168-3518

4.32 ± 0.10 mm (0.17 ± 0.004 inch)

3.65 mm (0.14 inch)

3P-0392, 6Y-7923, 8E-1204 3.76 mm (0.15 inch)

168-3512

3P-0340, 6Y-7921, 6Y-7981

3.65 mm(0.14370 inch)

8E-7395

4.00 ± 0.08 mm (0.16 ± 0.003 inch)

3.36 mm (0.13 inch)9U-8397

6I-8911

3.33 mm (0.13 inch)

6I-8912

6Y-1300

6Y-7968, 357-0450

7T-4998, 6Y-7932

163-0342

163-0343

168-3516

168-3517

168-3522

177-6795

6Y-7922

7T-5727





134-8360

168-3519

168-3523

168-3524

108-5751

223-7519

275-5308 3.81 ± 0.10 mm (0.1500 ± 0.0039 inch)3.51 mm(0.1382 inch)

337-6763 3.45 ± 0.10 mm (0.14 ± 0.004 inch) 3.20 mm (0.126 inch)

2P-9343 3.33 ± 0.10 mm (0.13 ± 0.004 inch) 2.87 mm (0.11 inch)

274-4411 3.25 ± 0.08 mm (0.13 ± 0.003 inch) 3.00 mm (0.12 inch)

257-6105 3.20 ± 0.08 mm (0.12 ± 0.003 inch) 2.75 mm (0.11 inch)

258-5652 3.05 ± 0.1 mm (0.1201 ± 0.0039 inch)2.80 mm(0.1102 inch3)

159-09273.00 ± 0.08 mm (0.12 ± 0.003 inch) 2.33 mm (0.09 inch)

168-3515

168-3514

2.95 ± 0.13 mm (0.11 ± 0.005 inch) 2.70 mm (0.11 inch)

187-8922

8P-8682, 6Y-5914

6P-3089, 6T-8687, 6Y-7934

2P-3747, 6Y-7919

2P-3719, 6T-8686, 6Y-7935

6Y-1697, 6Y-7965

7T-7772

217-4541 2.87 ± 0.08 mm (0.113 ± 0.0031 inch)2.62 mm(0.1031 inch)

354-40322.8 ± 0.1 mm (0.1102 ± 0.0039 inch)

2.42 mm(0.0953 inch)424-0896

257-6102





2.50 ± 0.08 mm (0.09 ± 0.003 inch) 2.05 mm (0.08 inch)257-7588

257-8633

355-89202.1 ± 0.1 mm (0.0827 ± 0.0039 inch)

1.91 mm(0.0752 inch)424-0897

9G-8542, 6Y-7929

2.05 ± 0.08 mm (0.08 ± 0.003 inch)1.80 mm (0.07 inch)

6Y-7957

313-5544 1.77 mm (0.07 inch)

6T-5099, 6Y-7933, 8E-8832

1.73 ± 0.08 mm (0.07 ± 0.003 inch) 1.58 mm (0.06 inch)

Clutch Plates

Nomenclature


Nomenclature for a transmission clutch plate

(5) Face of Reaction

(6) Tang

(7) Slot for Pin

(8) Part Number

(9) Inside Diameter

(10) Outside Diameter

Cracked Clutch Plates or Broken Clutch Plates






The illustration shows a clutch plate with a broken tang.



The illustration shows a clutch plate with a radial crack.


Wear on the Slot for the Pin






(A) Maximum width of the slot

(B) Maximum width of the radial indentation

Table 3

Wear Limits for the Slot for the Pin

Diameter for theReaction Pin

Maximum Width of theSlot (A)

Maximum Width of the RadialIndentation (B)

12.70 mm (0.500 inch) 16.3 mm (0.64 inch) 9.7 mm (0.38 inch)

15.88 mm (0.625 inch) 19.3 mm (0.76 inch) 9.7 mm (0.38 inch)

Note: A plate that is worn may be reused under certain circumstances. The wear on the slot must only beon one side of the plate. The plate must meet all the limitations. The limitation on the radial indentationdoes not need to be met. The plate must be used in the same clutch and in the same application.

Scratches and Nicks

Remove any sharp edges that have been caused by scratches or nicks by carefully rubbing only the area

of the sharp edge with a 6V-2010 Polishing Stone or with 00 emery paper and a solvent. Rub the edgeuntil the sharp edge cannot be felt with a fingernail or a lead pencil. Put oil on the plate or on the surfaceto prevent rust.

Note: Use only the procedure that is shown in "Scratches and Nicks". Any other method can cause rapidwear of the disc assemblies.






The illustration shows the use o f a stone for polishing for the removal of a sharp edge that was caused by a scratch or a nick.


This part can be used again after removing the sharp edge that was caused by a scratch or a nick.

Wear and Grooves

Clutch plates with polished surfaces can be reused without further preparation. Do not reuse a plate if grooves are worn into the surface of the plate. If the clutch plates have been worn evenly, and the clutch

plates do not have any grooves, the clutch plates can be reused without further preparation. Theminimum thickness is given in Reuse and Salvage Guideline, SEBF8014, "Identification andApplications of Transmission Clutch Plates and Specifications to Machine Reaction Faces for Power Shift Transmissions".






This plate has polished surfaces but the plate is not grooved or excessively worn.


Parts with polished surfaces can be used again if the polished surfaces are not grooved or excessivelyworn.


This plate has grooves and ridges in the contact surface.


This part cannot be reused because of grooves and ridges in the contact surface.





Low Spots

The methods that are used to manufacture some plates can produce low areas near the tangs. These areasare called low spots. These low spots are thinner than the rest of the disc. Plates with low spots arereusable if the plates meet the other criteria for reusability.


Plate with low spots


Low spots are acceptable.

High Spots

Transmission clutch plates that show a high spot (shiny surface) and/or a smeared surface in the area of the tang must be checked for a difference of thickness before the plates can be used again. Normally,clutch plates that have an indication of high spots at the tang will have little sign of wear on the face of reaction between the tangs. Specifications for the thickness of each clutch plate are given in the tables foridentification in Reuse and Salvage Guideline, SEBF8014, "Identification and Applications of Transmission Clutch Plates and Specifications to Machine Reaction Faces for Power Shift

Transmissions".

Use a micrometer to measure differences in thickness of the plate. Measure the thickness of the face of reaction at a high spot. Also, measure the thickness of the face of reaction halfway between the high spotand the next tang.

Subtract the high measurement from the low measurement. This will be the difference in thickness.Measure the difference in thickness at each high spot on the clutch plate. The clutch plate cannot be usedagain if the thickness difference at any point on the clutch plate is more than the given specification.These clutch plates can be put through a reconditioning operation.






Measure the clutch plates for a difference of thickness at areas (11) and (12).

Manufacturing and Handling Damage

Plates with manufacturing or handling damage can be used if all sharp edges and raised edges areremoved.

Illustration 24 g03784124Manufacturing or handling damage is shown on a clutch plate.


The part should be checked before the part is reused. The part may not have any edges that are raised or sharp edges.

Measurement Of Warp and Dish






Measurements of outside gap (C) and inside gap (D)


Measurement of outside gap (C) and inside gap (D)

( C) Outside gap

(D) Inside gap

(E) Outside diameter

(F) Inside diameter

1. Remove any rough edges in the area of the slot for the pin.

2. Put the clutch plate on a flat surface such as a face of reaction on the housing for a clutch, a center plate for a transmission, or a surface plate. If dishing is obvious, put the plate on the flat surface sothe concave side is up.

3. Measure the gap between the clutch plate and the surface for inspection at both outside diameter (E) and inside diameter (F). Measure the gap at a minimum of three points around the plate withequal distances between the points.

4. If outside gap (C) at the outside diameter at any of the points is more than 0.38 mm (0.015 inch),the clutch plate cannot be used again.

5. If inside gap (D) at the inside diameter at any of the points is more than 0.15 mm (0.006 inch), theclutch plate cannot be used again.

6. Subtract the measurement of inside gap (D) from the measurement of outside gap (C) if the gapsthat were measured in Step 4 and Step 6 are acceptable. If the difference is more than 0.15 mm(0.006 inch), the clutch plate cannot be used again.

Example




The measurement of gap (C) is 0.28 mm (0.011 inch) which is less than the maximum. The measurementof gap (D) is 0.10 mm (0.004 inch) which is less than the maximum. This difference between themeasurement of outside gap (C) and inside gap (D) is 0.18 mm (0.007 inch) which is more than themaximum. This clutch plate cannot be used again.

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