MODULE GP-CONTROL 3412409 - Caterpillar

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.
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 "PS4395" 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, 1999Problem
The brake light bulbs may have insufficient life on certain 24H Motor Graders do to vibration and radiator grill bolts come loose.
Affected Product
Model & Identification Number
24H (7KK24-51, 7KK53, 7KK55, 7KK57)
Parts Needed
12 - 7C6921 SPACER12 - 8T6466 BOLT12 - 7X7729 WASHER2 - 1303453 LAMP GP-SIGN (Not required on 7KK57)1 - 1537804 SHEET AS(RH) (Not required on 7KK57)1 - 1537805 SHEET AS(LH) (Not required on 7KK57)1 - 1537939 SUPPORT AS (Not required on 7KK57)Action Required
See the attached procedure.
Service Claim Allowances
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.(1-Rework Procedure)Rework Procedure
7KK24 - 51, 53 AND 551. REMOVE THE 125-0246 SUPPORT ASSEMBLY AND THE 125-2769 SUPPORT ASSEMBLY (Illustration 2, REF. NO. 26 AND 12).2. REMOVE THE 3E6466 TAIL LAMPS - AMBER (Illustration 1, REF. NO. 24) FROM THE 125-0246 SUPPORT ASSEMBLY.3. REPLACE THE 134-4815 PLATE ASSEMBLY - LEFT HAND (Illustration 2, REF. NO. 5) WITH THE 153-7805 SHEET ASSEMBLY.4. REPLACE THE 134-4816 PLATE ASSEMBLY - RIGHT HAND (Illustration 2, REF. NO. 32) WITH THE 153-7804 SHEET ASSEMBLY.5. INSTALL TWO NEW 130-3453 LAMP GROUPS - RED AND THE 2 X 3E6466 LAMP GROUPS - AMBER PREVIOUSLY REMOVED FROM THE 125-0246 SUPPORT ASSEMBLY.6. INSTALL THE 125-2769 SUPPORT ASSEMBLY AND THE 153-7939 SUPPORT ASSEMBLY USING 12X8T6466 BOLTS, 12 X 7X7729 WASHERS AND 12 X 7C6921 SPACERS. Tighten the bolts to a torque of 55 10 N m (41 7 lb ft).7KK571. REPLACE THE 12 X 8T4136 BOLTS AND 12 X 8T4121 WASHERS HOLDING THE 125-2769 SUPPORT ASSEMBLY AND THE 153-7939 SUPPORT ASSEMBLY (Illustration 2, REF. NO. 12, 16, 18, and 26) WITH 12 X 8T6466 BOLTS, 12 X 7X7729 WASHERS AND 12 X 7C6921 SPACERS. Tighten the bolts to a torque of 55 10 N m (41 7 lb ft).2. REPLACE THE 12 X 8T4136 BOLTS AND 12 X 8T4121 WASHERS HOLDING THE 125-2769 SUPPORT ASSEMBLY AND THE 153-7939 SUPPORT ASSEMBLY WITH 12 X 8T6466 BOLTS, 12 X 7X7729 WASHERS AND 12 X 7C6921 SPACERS.
Illustration 1
Illustration 2