TM-9-2320-280-20-2

TRUCK, UTILITY: M998 SERIES

TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 2 OF 3

JANUARY 1996

TM-9-2320-280-20-2 - Page 105 of 951

3-44. ENGINE IDLE SPEED ADJUSTMENT

This task covers:

Engine Idle Speed Adjustment

Engine Idle Speed Adjustment

1.

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

2.

Note idle speed and disconnect lead 569B (2) from injection pump (4). If change in idle speed is noted,

refer to para. 2-22, Fuel System Tests. If no change in idle speed is noted, connect lead 569B (2) to

injection pump (4) and proceed to step 3.

WARNING

Keep hands and arms away from fan blade and drivebelts while

engine is running or serious injury may result.

3.

Set engine idle speed to 650 rpm (± 25 rpm) for the 6.2L engine or 700 rpm (± 25 rpm) for the 6.5L

engine by turning idle speed adjusting screw (1) on throttle shaft lever (3).

INITIAL SETUP:

Tools

General mechanic’s tool kit:

automotive (Appendix B, Item 1)

Test Equipment

STE/ICE-R

Manual References

TM 9-2320-280-10

Equipment Condition

Hood raised and secured (TM 9-2320-280-10).

General Safety Instructions

Keep hands and arms away from fan blade and

drivebelts while engine is running.

TM 9-2320-280-20-2

Change 3

3-83

FOLLOW-ON TASK: Lower and secure hood (TM 9-2320-280-10).

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