3116 and 3126 Truck Engines Unit Injector Hydraulic Pump – Install

Installation Procedure


Illustration 1 g00644693

Position gear (9) and the washer on the unit injector hydraulic pump. Install bolt (8). Tighten the bolt to a torque of 110 ± 14 N·m (80 ± 10 lb ft).

Install new O-ring seal (7) and lubricate the seal with clean engine oil.


Illustration 2 g00644692

Install oil inlet port (2) in unit injector hydraulic pump (1). Tighten the port to a torque of 26 ± 3 N·m (19 ± 2 lb ft).

Install oil outlet port (3) in unit injector hydraulic pump (1). Tighten the port to a torque of 17 ± 2 N·m (13 ± 1 lb ft).

Install the washers and bolts (5) .

Install new O-ring seals on tube assemblies (4) and (6) and install the tube assemblies in unit injector hydraulic pump (1) .

End By:

Install the injection actuation pressure control valve. Refer to Disassembly and Assembly, “Injection Actuation Pressure Control Valve – Install”.
Install the fuel transfer pump. Refer to Disassembly and Assembly, “Fuel Transfer Pump – Install”.

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