Usage:
836 (7FR) Compactors;
5110 (8HN, 7GN) Excavators;
24H (7KK) Motor Graders;
769D (5TR),
771D (6JR),
773D (7ER),
775D (6KR) Off-Highway Trucks;
PM565 (3TK113-Up) Cold Planers;
D9R (8BL830-Up, 7TL557-Up),
D10R (3KR) Track-Type Tractors;
988F (2ZR),
990 (4FR) Wheel Loaders;
834B (7BR) Wheel Tractors;
631E Series II (1AB1640-Up, 1NB1390-Up),
633E Series II (2PS),
637E Series II (1FB532),
651E (4YR),
657E (5YR, 6PR, 6TR, 7KR) Scrapers
Description of Change: The above machines are powered by 3408E and 3412E engines equipped with HEUI fuel systems. The HEUI hydraulic pump was previously available only as a completely assembled pump. Along with several previously released servic4able parts of the pump, the pump compensator and the socket head bolts are now available for parts service.
Adaptable To: The HEUI 166-5985, Pump Compensator, and 164-0759, Socket Head Bolts, are now available for the HEUI hydraulic pump. The torque for the socket head bolts is 7.45 ± 0.65 N·m (66 ± 6 lb in).
The following is a list of references that may be helpful when reworking the HEUI hydraulic pump.
Test Procedure; NEHT6160; HEUI Equipped Engines.
Video; LEVN4245; Disassembly and Assembly of the 144-0835 Unit Injector Hydraulic Pump.
Special Instruction; REHS0192-03; Disassembly and Assembly of the 144-0835 Unit Injector Hydraulic Pump.
Special Instruction; REHS0282-01; Installation of the HEUI Pump Compensator Standby Plug For 3408E And 3412E Engines.
The following is a current list of the HEUI unit injector hydraulic pump's serviceable parts.
