TM-9-2320-283-20-1

TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 1 OF 3

DECEMBER 1983

TM-9-2320-283-20-1 - Page 449 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

131.

FRONT END SHIMMIES.

Step 1.

Check for badly worn or unevenly worn tires.

Replace tires (para 3-208).

Step 2.

Check for improperly mounted tire or wheel.

Replace tire (para 3-208).

Step 3.

Check wheel bearings for play using a pry bar.

Adjust or replace bearing (para 3-205 or 3-207).

Step 4.

Check all steering linkage for proper lubrication.

(Refer to LO 9-2320-283-12).

Step 5.

Inspect tie rod for damaged and loose ends.

No play is allowable.

Replace tie rod end, if loose or damaged (para 3-218).

Step 6.

Inspect vertical link for damage.

Replace vertical link (para 3-216).

Step 7.

Check wheel and brake drums for proper balance.

Balance or replace wheel or brake drums (para 3-204 or 3-206).

Step 8.

Check for proper toe-in (1/32-inch ± 1/32-inch).

Adjust toe-in (para 3-203).

Step 9.

Check for air in hydraulic system.

Start engine.

Turn steering wheel right then left several times until shimmy is eliminated.

Shut

down engine.

Check fluid level and add to full mark.

(Refer to LO 9-2320-283-12).

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