COUPLING ASSEM. (90 degrees) 8S6392 - Caterpillar

1. Inspect the O-ring and, if necessary, install a new O-ring.2. Lightly lubricate the O-ring with clean engine oil and put the pump into position on the timing case. Be sure that the key is engaged correctly in the keyway of the drive gear.3. Install the spring washer and the nut to hold the drive gear. Tighten the nut to 15 N m (11 lb ft).4. Hold the top of the pump toward the engine to remove the backlash and install the nuts to the pump flange. Tighten the nuts to 22 N m (16 lb ft).5. Loosen the locking screw on the pump and position the spacer so that the locking screw will tighten against the spacer. Tighten the locking screw to 10 N m (7 lb ft).6. Tighten the nut for the drive gear to 80 N m (60 lb ft). Install the gear cover.
Use a second wrench to prevent movement of the high-pressure outlet when the union nut for each high-pressure pipe is tightened.
7. Install the pipes, cables and connection for the cold start device to the pump.8. Remove air from the fuel system, see page 7.9. Operate the engine and check for leakage.