TM-9-2320-272-24-1

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4

JUNE 1998

TM-9-2320-272-24-1 - Page 786 of 1015

TM 9-2320-272-24-1

3-152. TOE-IN CHECK AND ADJUSTMENT

THIS TASK COVERS:

a. Toe-in Check

b. Toe-in Adjustment

INITIAL SETUP:

APPLICABLE MODELS

REFERENCES (TM)

All

TM 9-2320-272-10

TOOLS

TM 9-2320-272-24P

General mechanic’s tool kit (Appendix E, Item 1)

EQUIPMENT CONDITION

Toe-in gauge (Appendix E, Item 56)

l

Vehicle parked on level ground (TM 9-2320-272-10).

Torque wrench (Appendix E, Item 144)

l

Engine off (TM 9-2320-272-10).

l

Parking brake set (TM 9-2320-272-10).

l

Tires properly inflated (TM 9-2320-272-10).

l

Wheel bearings adjusted (para. 3-225).

a. Toe-in Check

1.

2.

Place front wheels (1) in straight-ahead position.

Place toe-in gauge between front wheels (1) at middle of tires (3) as far in front of axle (2) as

possible.

3.

4.

Move toe-in gauge until chains just touch the ground.

Move scale so pointer reads 0.

NOTE

5.

6.

Assistant will help with steps 5 through 7.

Start engine (TM 9-2320-272-10).

With toe-in gauge in place, move vehicle forward until toe-in gauge is in back of axle (2) and chains

just touch ground.

7.

Stop engine (TM 9-2320-272-10).

b. Toe-in Adjustment

1.

Read position of pointer on scale. Pointer should read 1/16-3/16-inch toe-in.

2.

If reading is not within limits given, leave toe-in gauge in place and proceed to step 3.

3.

Loosen two nuts (5) on tie rod (4).

4.

Turn tie rod (4) until pointer reads 1/16-3/16-inch toe-in on scale.

5.

Tighten nuts (5) 60-80 lb-ft (81-109 N.m).

6.

Remove toe-in gauge.

3-422