1T-0149 Bearing Outer Race Inspection and Reuse {3100, 3101, 3102, 3113} Caterpillar

Motor Grader:

16 (S/N: 49G1-UP)

Off-Highway Truck/Tractor:

768B (S/N: 79S1-UP)

769 (S/N: 99F1-UP)

769B (S/N: 99F1-UP)

772 (S/N: 10S1-UP; 11S1-UP; 80S1-UP)

773 (S/N: 63G1-UP)

Wheel Tractor-Scraper:

619C (S/N: 61F1-UP)

630A (S/N: 52F1-UP; 14G1-UP)

631A (S/N: 51F1-UP)

631B (S/N: 13G1-UP)

632 (S/N: 14G1-UP)

633 (S/N: 44J1-UP)

641 (S/N: 64F1-UP; 41M1-UP)

650 (S/N: 63F1-UP; 77F1-UP)

651 (S/N: 33G1-UP; 44M1-UP)

657 (S/N: 19G1-UP; 31G1-UP; 53K1-UP; 46M1-UP)

657B (S/N: 53K1-UP; 47M1-UP)

660 (S/N: 77F1-UP; 90F1-UP)

666 (S/N: 77F1-UP; 20G1-UP; 32G1-UP; 64H1-UP)

666B (S/N: 20G1-UP)

Introduction

© 2013 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.

This Reuse and Salvage Guideline contains the necessary information in order 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 in order 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.

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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 part numbers for replaced parts.

Summary

The 1T-0149 Bearing Outer Race can become worn on a bearing race support diameter, and on the roller contact surface. Salvage and reusability information contained below should allow satisfactory operation for a period equal to the previous operating time. The 1T-0151 Cam and 1T-0955 Cam can become worn on the roller contact flats. Reusability information contained below should allow satisfactory operation for a period equal to the previous operating time.

Race Inspection and Salvage

Freewheel Roller Race Bore

Illustration 1	g02153869
Torque converter (1) 1T-0149 Bearing Outer Race (2) 1T-0564 Bearing (3) 1T-0073 Roller Bearing (4) 1T-0151 Cam

Illustration 2	g02154753
Use again. The freewheel roller race bore has small ripples, but can be used again if the bore dimensions are within specifications.

1. Inspect the freewheel roller race bore for wear, ripples, and spalling that a shown in Illustration 2. Use a dial gauge at the top and bottom, in two places, 90 degrees apart, and over wear ripples to determine the amount of wear.

   Races with small ripples (wear marks) can be used again if the bore dimensions are within the maximum permitted limits. Pits and spalling are not permitted.

   Races with worn or rippled bores cannot be salvaged by grinding, chrome plating or metal spray.

   1. The maximum diameter using new rollers and the new cam is 152.438 mm (6.0015 inch).

   2. The maximum diameter using new rollers and the used cam is 152.509 mm (6.0043 inch).

2. Inspect the bore for wear caused by the 1T-0073 Roller Bearing (4). See Illustration 1.

   The maximum diameter should be 152.438 mm (6.0015 inch).

Bearing Support Diameter

Illustration 3	g02153870
Bearing outer race (5) Face A (6) Bearing support

A worn bearing support on the 1T-0149 Bearing Outer Race will cause the bearing to move on the bearing support. See Illustration 3. The bearing support can be chrome plated or metal sprayed and then machined to bring the bearing support back to the original dimensions.

Illustration 4	g02154773
1T-0149 Bearing Outer Race (5) Face A (6) Bearing support (7) Chamfer 1.5 mm (0.06 inch) X 30 degrees (8) Radius 1.5 mm (0.06 inch) (9) Face B (10) Radius 1.5 mm (0.06 inch) (C) Bore of freewheel roller race 6.040 mm (0.2378 inch) (D) Outside diameter 187.33 ± 0.13 mm (7.375 ± 0.005 inch)

Before the bearing support is machined, grind the outside diameter (D) of the race. See Illustration 4. The ground area will give a surface to chuck (hold) 1T-0149 Bearing Outer Race concentric (having a common center) with the freewheel roller race bore.

Use the following procedures to machine the bearing support and for chrome plate application.

Mechanical Preparation for Plating or Metal Spraying

1. Install the race in a four jaw chuck of an internal grinder. Chuck (hold) on the bearing support of the race. Make an indication of Total Indicator Reading (TIR) of Face B (9) that as shown in Illustration 4. Use a brass hammer to hit the race lightly until TIR of Face B is zero. Make an indication of TIR of the freewheel roller race bore until the TIR of freewheel roller race bore also zero.

   Note: Make sure that the dial indicator must not contact with the area of the freewheel roller race bore that shows wear from the rollers.

2. Grind the outside diameter (D). Remove only enough material to clean up the outside diameter. There must be a 1.5 mm (0.06 inch) radius (10) between the outside diameter and the tooth flange. Refer to Illustration 4. Do not grind the tooth flange.

   Note: Step 3 and Step 4 are optional if the part will be metal sprayed.

3. Remove the race from the grinder and turn the race around. Chuck on the outside diameter. Zero set the part by an indication of TIR of the outside diameter.

4. The worn bearing support must be machined to a depth that will remove all indications of surface wear. There must be a 1.5 mm (0.06 inch) radius (8) between the bearing support (6) and Face A (5). See Illustration 4. Do not grind this radius. Chrome plating must not be applied to this radius. There must be no indications of grinding errors, such as chattering, checkering or burning.

Hard Chrome Plating

Use standard commercial masking, plating baths and procedures for the application of chrome plating.

Procedure to Grind Hard Chrome Plating

1. Install the race in an internal grinder. Chuck (hold) on the outside diameter (D). Zero set the part by an indication of TIR of the outside diameter.

2. Carefully grind the chrome plating to prevent heat or pressure damage to the plating. Grind the plating with a Norton No. 32-A-80-K5-VBE, or a similar aluminum oxide, 80 grit vitrified bond grinding wheel. Use a large volume of cutting fluid, either heavy duty synthetic or light soluble oil. Use wheel speeds of 1980 to 2590 surface meters per minute (6500 to 8500 surface feet per minute [S.F.P.M.]) and a medium to high work speed to prevent heat damage. Stock removal must be limited to a maximum of 0.05 mm (0.002 inch) per pass.

3. Grind the chrome plated bearing support to a diameter of 89.995 ñ 0.008 mm (3.5431 ñ .0003"). The machined bearing support must have a surface finish of no more than 1.6 microns (63 microinches). The machined bearing support must be concentric (having the same center) to the freewheel roller race bore within 0.08 mm (0.003 inch) TIR Grind a 30 degrees x 1.5 mm (0.06 inch) chamfer (7) on the bearing support (Illustration 4). There must be a 1.5 mm (0.06 inch) radius (8) between the bearing support (6) and Face A (5) that as shown in Illustration 4.

   Note: Metal spray is an acceptable method of restoring a surface to the original size. Consult the manufacturer of the metal spray equipment for powder recommendations, machine settings, and application procedures. Each step in the procedure is critical in achieving the desired coating bond and surface finish.

   METCO Inc. is one manufacturer of acceptable metal spraying equipment and powder. A list of METCO sales offices may be found in Guideline For Reusable Parts And Salvage Operations, SEBF8060, "Repair of Transmission, Torque Converter and Torque Divider Shafts".

Cam Inspection

Note: There are no salvage procedures for the cam.

1T-0151 Cam

Illustration 5	g02154774
1T-0151 Cam (12) Center to flat dimension (13) Path for 1T-0078 Impeller

1. Inspect the cam for wear steps. The maximum allowable step on any flat is 0.008 mm (0.0003 inch).

2. Inspect the cam for uniform wear. Set up the cam on a surface plate using an adjustable arbor and Vee blocks. Set up a dial indicator and zero on the path for the 1T-0078 Impeller . Determine the center of the cam from the measurement taken in the preceding step. Move the indicator to the machined flats on the cam.

   1. The minimum measurement using new roller and the race is 63.246 mm (2.4900 inch)

   2. The minimum measurement using new roller and used race is 63.360 mm (2.4945 inch)

1T-0955 Cam

1. Inspect the cam for wear steps. The maximum allowable step on any flat is 0.008 mm (0.0003 inch). Deeper steps will prevent proper roller engagement.

2. Inspect the cam for uniform wear. Measure across the flats.

   1. The minimum diameter using new rollers and new race is 126.489 mm (4.9799 inch)

   2. The minimum diameter using new rollers and used race is 126.718 mm (4.9889 inch)