Product Support Program For Replacing The Brake Pump Outlet Tube And Related Parts On Certain 793C Trucks Caterpillar

Product Support Program For Replacing The Brake Pump Outlet Tube And Related Parts On Certain 793C Trucks

Usage:

@media screen { div.divFooter { display: none; } } @media print { div.divFooter { position: fixed; bottom: 0; right: 0; } }

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 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 "PS4017" 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

May 31, 1998

Problem

The existing brake pump outlet tube may leak on certain 793C Trucks causing customer downtime to repair/reseal.

Affected Product
Model & Identification Number

793C (4AR77, 4AR78, 4AR80-84, 4AR86-93, 4AR96-98, 4AR100, 4AR101, 4AR103-140, 4AR143-147, 4AR164)

Parts Needed

2 - 2H6338 Seal-O-Ring

2 - 3J1907 Seal-O-Ring

11 - 4J0527 Seal-O-Ring

2 - 6J2680 Seal-O-Ring

16 - P4582 Flange-Half

32 - 8T4183 Bolt

6 - T4184 Bolt

32 - 8T4223 Washer-Plate

1 - V0484 Adapter-O-Ring

1 - V0852 Cap-Dust

1 - 6V3965 Nipple As.

6 - 7X0584 Washer-Hard

8 - 950670 Bolt, Hexagon

2 - 1435134 Hose As.

1 - 1416131 Hose As.

2 - 1416132 Elbow

1 - 1416133 Elbow

1 - 1416285 Hose

1 - 1417258 Manifold

2 - 1435028 Block

Action Required

See the attached procedure.

Service Claim Allowances

NOTE: This is a 16-hour job.

Parts Disposition

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

Attach.

(1-Rework Procedure)

Rework Procedure

1. Drain hydraulic fluid from hydraulic tank.

2. Loosen bolts connecting the 1374909 Block on the cooler and let hydraulic oil drain from coolers into a drain pan.

3. Remove bolts from bottom block and slide opposite end of tube out of the upper block.

4. Remove bolts connecting upper 1374909 Block from pump manifold.

5. Disconnect all suction and pressure lines from brake pump.

6. Disconnect all suction and pressure lines from the pump manifold (1249835).

7. Remove all bolts (8-8T7930, 4-8T4183) connecting the brake pump manifold (1249835, 1255111) to the pump (1249377). Remove the manifolds once bolts are out.

8. Remove all (4) bolts (8T4193) from the (1) cooler manifold (1319389) connected to the bottom of the oil cooler.

INSTALLING 3-XT HOSE SET-UP.

9. ****Location - First And Second Pump Port****

Install 2 - 1416132 Elbow:

1 - 4J0527 Seal.

2 - 8T4184 Bolts.

2 - 7X0584 Washers.

10. ****Location- Third Port Of Pump****

Install 1 - 1416133 Elbow with:

1 - 4J0527 Seal.

2 - 8T4184 Bolts.

11. ****Location- Rear Of 1416133 Manifold****