Product Support Program For Installing Resilient Hood Mounts On Certain 793 And 793B Trucks Caterpillar

Product Support Program For Installing Resilient Hood Mounts On Certain 793 And 793B Trucks

Usage:

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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 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 "PS4955" 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

July 31, 1994

Problem

The existing hood mounting brackets may fail or the mounting bolts may loosen on certain 793 and 793B Trucks.

Affected Product
Model & Identification Number

793 (3SJ1-55)

793B (1HL1-14)

Parts Needed

1 - 7I5684 Bracket Assembly

1 - 7I5800 Bracket Assembly

1 - 7I5801 Bracket Assembly

6 - 7G8839 Spacer

2 - 7T8331 Mounting

2 - 8T4244 Nut

2 - 8T4648 Bolt

1 - 1010368 Prop Assembly

Action Required

See the attached procedure.

Service Claim Allowances

NOTE: This is a 4-hour job.

Parts Disposition

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

Attach.

(1-Rework Procedure)

Rework Procedure

Do not torch or weld on painted areas. The effect of gasses from burned paint is a danger to the person doing the cutting or welding.

NOTE: Before using a torch or welding on the ROPS, refer to Special Instruction, SEHS8764, Inspection, Maintenance and Repair of Rollover Protective Structures (ROPS) and Attachment Installation Guidelines for the correct procedures.

1 Remove both the front fiberglass hood and metal hood.

2 Remove (cut) the mounting brackets for the metal hood from both sides of the frame and grind smooth.

3 Remove (cut) the bracket from the right side of the hood. (Bracket closest to the right hand platform). Grind the area smooth.

4 Drill a 25.4 mm (1") diameter hole between the two existing holes on the left hood bracket. See Illustration 1.

5 Weld the new 7I5800 Bracket Assembly to the hood assembly. (Use a 3 mm fillet weld as shown in Illustration 4. Mount the bracket so that the hole in the bracket is 26 mm (1.02 ") from the rear edge of the hood and 2350 mm (92.5")away from the hole drilled in Step 4. See Illustrations 2, 3, and 4.

6 Install the rubber mounts and the remaining brackets on the hood. Put the hood in position on the truck and install two bolts between the hood and front cowl assembly. Try to center the bolts in the mounts and in the hood to provide for easier removal and installation. See Illustrations 4, 5, and 6.

7 Tack weld the two bracket assemblies to the frame and ROPS Tube. Remove the hood.

8 Finish weld the brackets to the frame and ROPS Tube. Use 5 mm fillet welds in the locations shown in Illustrations 4 and 5.

9 Install both the hood and the fiberglass hood. Tighten all bolts to their standard torque.

10 Remove the prop rod assembly for the hood and install the new 1010368 Prop Assembly.

Illustration 1