Striker Bar Modification Is Now Available for HDXL Undercarriage on Certain Track-Type Tractors {7180} Caterpillar

Track-Type Tractor

D8L (S/N: 4FB1-UP; 7YB1-UP; 7JC1-UP; 53Y1-UP)

D8N (S/N: 9TC1-UP; 1XJ1-UP; 5TJ1-UP; 7TK1-UP)

D8R (S/N: JR81-UP; DWJ1-UP; MEJ1-UP; RJM1-UP; 7XM1-UP; 9EM1-UP; T5X1-UP)

D8R Series II (S/N: AKA1-UP; 6YZ1-UP)

D8T (S/N: JJ51-UP; MB81-UP; J8B1-UP; FMC1-UP; MLN1-UP; FCT1-UP; KPZ1-UP)

When retrofitting D8 Heavy-Duty Extended Life (HD XL) undercarriage to a D8N, D8R or a D8T with a striker bar, the grouser on Extreme Service track shoes (ES) and Super Extreme Service track shoes (SES) may contact the rear striker bar and the gusset for the rear striker bar on the machines listed above.

This may occur when the rear major bogie and rear idler are fully articulated upward. Therefore, the striker bar and gusset may need modifications.

Note: Only the rear striker bar is affected.

The following changes are now available for the products within the listed serial numbers.

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Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.

Rework Procedure

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Illustration 1	g06348924
(A) Block (B) Bogie

1. Back the tractor on blocks (A) to put rear major bogie (B) in the uppermost position against the stops.
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   Illustration 2	g06348925
   (C) Weld (D) Gusset (E) Striker bar

2. Do not cut welds (C). Cut off gusset (D) just outboard of weld (C). Stop the chamfer on striker bar (E) just outboard of weld (C) to protect the integrity of the rear enclosure.
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   Illustration 3	g06348929
   (D) Gusset

3. Remove gusset (D) flush with the striker bar on both sides of the tractor.
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   Illustration 4	g06348930
   (E) Striker bar

4. After gusset (D) is removed, chamfer striker bar (E) to allow clearance for the grouser if necessary. The dimension for the clearance for the grouser to the striker bar is 25.4 mm (1.00 inch) wide by a maximum of 38.1 mm (1.50 inch) tall from the end of striker bar (E). Only chamfer enough material from striker bar (E) to obtain a 6.350 mm (0.2500 inch) clearance between the shoe and striker bar (E).