PUMP GP-FUEL INJECTION 7C9634 - Caterpillar

TECHNICAL INFORMATION BULLETIN JUNE 9, 2004
BACKHOE LOADERS 416B (8SG1-Up, 8ZK1-Up)
426B (5YJ1-Up, 6KL1-Up)
428B (7EJ1-Up)
436B (6MJ1-Up, 7FL1-Up)
438B (3KK1-Up)
416C (4ZN1-Up, 1WR1-Up, 5YN1-Up,
1XR1-Up)
426C (6XN1-Up, 1YR1-Up, 7WN1-Up,
1ZR1-Up)
428C (2CR1-Up, 8RN1-Up)
436C (9JN1-Up, 2BR1-Up, 8TN1-Up,
2AR1-Up)
438C (9KN1-Up, 2DR1-Up)
416D (BFP1-Up, BGJ1-Up)
420D (FDP1-Up, BLN1-Up, BKC1-Up,
BMC1-Up)
424D (BGP1-Up, BKR1-Up)
428D (BLL1-Up, BMT1-Up, BNB1-Up,
BNS1-Up)
430D (BNK1-Up, BML1-Up)
432D (BLD1-Up)
438D (BPE1-Up)
442D (BRY1-Up)
THIS TIB REPLACES THE JULY 19, 2000, BACKHOE LOADER TIB, COMPONENT CODE 4250. IGNORE THE FORMER PUBLICATION.
Component Code(s) 4250SUBJECT: BRAKE PISTON SEAL AVAILABLE TO REDUCE BRAKE DRAG
PROBLEM:
Some rear axles in backhoe loaders have experienced brake drag. The brake disc and plates do not fully disengage when the brake pedal is released between brake applications.
SOLUTION:
Replace the 9R-9409 Seal with the 149-5461 Seal. The 9R-9409 Seals are in the following rear axles: 9R-8004, 9R-8006, 107-3718,
114-0166, 118-5834, 118-5836, 156-2853, 156-2857, and 179-2279.
The 149-5461 Seal has a round cross-section. The 9R-9409 Seal has a square cross-section. The cross-section change was made in order to reduce the friction of seal to the piston and housing to allow it to move freely when the brake is released.
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ALL RIGHTS RESERVED