Brake Accumulator Supports Need To Be Inspected On Certain D350E And D400E Articulated Trucks Caterpillar

Brake Accumulator Supports Need To Be Inspected On Certain D350E And D400E Articulated Trucks

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Caterpillar: Confidential Yellow

NOTE: The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.

NOTE: This Program must be administered as soon as possible. When reporting the repair, use "PI3188" as the Part Number, "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description Code. Exception: If the repair is done after failure, use "PI3188" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.

Completion Date

February 28, 1999

Termination Date

August 31, 1999

Problem

The brake accumulator support clamps on certain D350E and D400E Articulated Trucks may not fit correctly. Some accumulators may vary in diameter which can cause this situation. Incorrectly fitting clamps may affect the durability of the accumulator and lead to leaks at the mounting union. Supports need to be inspected and reworked to ensure correct clamping.

Affected Product
Model & Identification Number

D350E (9LR503-614)

D400E (2YR800-1025)

Parts Needed

Dealers will need to order parts for this Program.

2 - 6V7687 LOCKNUT

Action Required

See the attached procedure.

Owner Notification

U.S. and Canadian owners will receive the attached Owner Notification.

Service Claim Allowances

NOTE: This is a 2-hour job.

NOTE: U.S. and Canadian Dealers Only - Eligible dealers may enter a Type 2 SIMS Report.

Parts Disposition

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

NOTE: MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

Attach.

(1-Owner Notification)

(2-Rework Procedure)

Copy Of Owner Notification For U.s. And Canadian Owners

Rework Procedure

The brake accumulators are located in the left hand hydraulic module. Lift transmission guards to gain access. Inspect the 126-3904 supports installed on both brake accumulators.

Measure the dimension between the support ends at the closest point to the accumulator as shown in the Illustration.

If the dimension is 18± 2mm, no rework is required. If dimension is 30 ± 2mm, carry out the following procedure.

1. Loosen 122-9593 Valve Gp-Check Mounting Bolts two full turns. Loosen 126-3904 Support, clamping bolt.

2. Remove 126-3904 Support Mounting Bolts and remove the support from the accumulator.

3. Remove the four (4) rubber strips from the support.

4. Install a new 6V7687 Nut onto the 12mm clamping bolt and re-install the support onto the accumulator.

5. Tighten support mounting nuts and bolts to 25 Nm.

6. Check measurement on other accumulator and rework if required.

7. Torque 12mm clamping bolts to 20 Nm as per Illustration.

8. Re-torque the mounting bolts on the 122-9593 valve gp, to 100 ± 20 Nm

NOTE: New 6V7687 Nuts should only be installed on supports that have had the rubber strips removed.

Illustration