C6.6 Engines for Caterpillar Built Machines Caterpillar

Note: Before the pump is removed from the engine the fuel injection pump shaft must be locked. Position the engine to TC compression stroke of number one cylinder before tightening the locking screw. Refer to Testing and Adjusting, "Finding Top Center Position for No. 1 Piston" for additional information. The locking screw will prevent the shaft from rotating. If the fuel injection pump was removed prior to correctly timing the engine and locking the shaft, the fuel injection pump will need to be timed by trained personnel. In order to time the fuel injection pump, refer to Disassembly and Assembly, "Fuel Injection Pump - Install".

Note: Refer to Systems Operation, "Cleanliness of Fuel System Components" for detailed information on the standards of cleanliness that must be observed during ALL work on the fuel system.

Illustration 1	g01236931
Typical example

(1) Locking screw

(2) Washer

(3) Pump bracket

(4) Pump bracket mounting bolts

(5) Block mounted bracket bolts.

(6) Support bracket on the block

Locking the shaft

Loosen locking screw (1) and move the washer (2) to the locked position. Tighten the locking screw to the following torque. ... 9 ± 1 N·m (80 ± 9 lb in)

Unlocking the shaft

Loosen locking screw (1) and move the washer (2) to the unlocked position. Tighten the locking screw to the following torque. ... 9 ± 1 N·m (80 ± 9 lb in)

Note: The support bracket on the block (6) must be installed after the coolant pump is installed. In order to stop the distortion of the timing case, finger tighten bolt (5) and then tighten bolts (4).

(4) Tighten the mounting bolts and the nut to the following torque. ... 22 ± 5.5 N·m (16 ± 4 lb ft)

(5) Tighten the mounting bracket bolts to the following torque. ... 44 ± 11 N·m (32 ± 8 lb ft)

Tighten the bolts that hold the fuel pump to the front housing to the following torque. ... 25 ± 2 N·m (18 ± 1 lb ft)