TM-9-2320-280-34

TRUCK, UTILITY: M998 SERIES

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

JANUARY 1996

TM-9-2320-280-34 - Page 102 of 1258

CAUTION

______

Ensure all cables and wires are clear from fan, belts, and exhaust

manifolds before starting engine, or damage to equipment will

result.

NOT E

If sensor light is not blinking, check clamp-on pickup fuel injection

line for proper installation.

11.

Depress offset adjustment switch (3) and hold.

12.

Operate increase/decrease switch (2) until offset adjustment reads 9.5 for 6.2L engines and 30.5 for 6.5L

engines on display (4). Release offset adjustment switch (3). Display (4) should not read: 0000 .

.. 0.0.

13.

Start engine (TM 9-2320-280-10) and warm up to operating temperature.

14.

Position sensor switches (1) to clamp-on and magnetic pickup positions.

NOT E

For vehicles with 1990 engines and above, timing must be 5°

before top dead center.

15.

Raise engine speed to 1300 rpm and read injection pump timing on display (4). Timing must be 4°

before top dead center. If timing is not 4° before top dead center, stop engine (TM 9-2320-280-10) and

adjust timing (para. 3-19b).

16.

Disconnect timing meter.

3 - 1 9 . ENGINE INJECTION PUMP TIMING (Cont'd)

TM 9-2320-280-34

3- 4 2

Change 1