Product Support Program For Installing Steel Bearings In The "A" Frames Of Certain D250E And D300E Articulated Trucks Caterpillar

Product Support Program For Installing Steel Bearings In The "A" Frames Of Certain D250E And D300E Articulated Trucks

Usage:

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Caterpillar: Confidential Yellow

NOTE: This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4607" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and use "T" as the SIMS Description Code. If administered after failure, use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.

Termination Date

December 31, 1999

Problem

The 128-6796 and 143-2668 Non-Metallic Bearings used in the rear suspension "A" frames on certain D250E and D300E Articulated Trucks may fail. The non-metallic bearings can be replaced with steel bearings and grease lines to extend service life.

Affected Product
Model & Identification Number

D250E (5TN636-1762)

D300E (7FN313-996)

Parts Needed

4 - 1A5666 NUT-FULL

2 - 3B8489 FITTING-HYD

2 - 5B3254 NUT-JAM

2 - 9B7237 BOLT

8 - 8C6913 WASHER-HARD

4 - 1D6089 BOLT

2 - 7K9197 ELBOW-SWIVEL

1 - 7M7456 COMPOUND-BRG

2 - 2N1287 ELBOW-FLARED

4 - 5P5509 COUPLING-HOS

16 - 5P9299 CLIP

8 - 5S7379 BOLT

16 - 8T4896 WASHER

2 - 8T5360 WASHER-HARD

4 - 2U6477 RING-CLAMP

2 - 4U1697 ADAPTOR-BULK

2 - 5U7151 CAP-GREASE

8 - 6V8801 NUT

520 - 9X2381 HOSE CM (BULK)

2 - 1602164 BEARING-SPHE

Action Required

See the attached procedure.

Service Claim Allowances

NOTE: This is a 7-hour job.

Parts Disposition

Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

Attach.

(1-Rework Procedure)

Rework Procedure

Both center and rear "A" Frames should be reworked at the same time. Refer to the service manual as required to carry out this rework.

1. Make the mounting plates and hose assemblies in Illustrations 2, 3, and 4. 2 plates are required of Illustration 4. (156-6301)

2. Disconnect the "A" Frames from the chassis and remove the non-metallic bearings.

3. Drill out the bearing mounting holes in the rear chassis to 23mm as per Illustration 6.

4. Drill and tap "A" Frame heads plates to accept grease fittings as shown in Illustration 5.

5. Install new 160-2164 Bearings into the "A" Frames, applying 7M7456 Sealant to the outer diameter of the bearing prior to installation. Install 2U6477 Rings using existing hardware. Reinstall "A" Frames to chassis with new hardware and torque to 700 ± 90 Nm.

6. Using manufactured 166-4457 Plate as a guide. Drill and tap the rear chassis in the area shown in Illustration 6 and mount the plate to the chassis.

7. Assemble grease lines as per Illustrations 6, 7, and 8.

8. Grease the bearings before operation.

NOTE: Service interval for the new steel bearings is every 10 hours.

Illustration 1