TM-9-2320-260-34-1

TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; VOLUME 1 OF 2

JULY 1994

TM-9-2320-260-34-1 - Page 285 of 657

TM 9-2320-260-34-1

3-81. ENGINE INJECTOR TIMING INSTRUCTIONS

THIS TASK COVERS:

a. Timing Tool Setup

b. Injector Timing

INITIAL SETUP

APPLICABLE MODELS

All

TOOLS

General mechanic’s tool kit

(Appendix B, Item 1)

Two dial indicators (Appendix B, Item 11)

Timing fixture (Appendix B, Item 56)

REFERENCES (TM)

TM 9-2320-260-34 P-1

EQUIPMENT CONDITION

Engine mounted on repair stand (para. 3-29).

Rocker lever housing covers removed (para. 3-36).

Rocker lever housing and push tube removed

(para. 3-37).

Crossheads removed (para. 3-39).

a. Timing Tool Setup

NOTE

This timing procedure is for engines mounted on test stand only.

The precise timing of the injector push tube travel with

corresponding piston travel is accomplished by using injector

timing fixture, 3375522, to measure travel of these two parts.

Adjustments to injection timing are made by altering the

thickness of cam follower gaskets or adding or removing cam

follower gaskets.

Ensure camshaft is pushed back against rear of cylinder block

for zero (0) end play.

Each dial indicator used must have a total travel of at least

0.250 in. (6.35 mm).

1.

Position timing fixture in injector sleeve (2) and engage rod of push tube indicator in injector push

tube socket.

2.

Install timing fixture by hand tightening knurled holddowns evenly. Ensure timing fixture is

straight on cylinder head (1).

3-233