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 110 of 1015

TM 9-2320-272-24-1

Table 2-1. Unit Preventive Maintenance Checks and Services (Contd).

ITEM TO

ITEM

INTERVAL

CHECK/

NOT FULLY

PROCEDURE

MISSION

NO.

SERVICE

CAPABLE IF:

21

Semi-

Steering

annual

f.

Inspect power steering pump for security of mounting,

system

(Contd)

leaks, and signs of damage. Tighten loose mounting

hardware.

g.

On M939/A1 series vehicles, inspect power steering

pump belts for tension and serviceability (para. 3-230).

h.

Inspect power steering pressure and return hoses and

fittings for loose connections, cracks, splits, or damage

that could cause potential hydraulic leaks. Tighten loose

hydraulic lines and fittings, and replace any hydraulic line

or fitting that has cracks, splits, or damage that could

cause potential hydraulic leaks. Refer to para. 3-234 for

Ross steering gear, or para. 3-235 for Sheppard

steering gear.

i.

Inspect power steering hydraulic lines between steering

gear and steering assist cylinder and fittings for security of

mounting, loose connections, cracks, splits, or damage that

could cause hydraulic leaks. Tighten loose hydraulic lines and

fittings, and replace any hydraulic line or fitting that has

cracks, splits, or damage that could cause hydraulic leaks

(para. 3-239).

j.

Inspect steering gear for security of mounting and

signs of leaks.

1.

Loosen bracket mounting screws (1).

2.

Tighten steering gear mounting locknuts (2)

260-280 lb-ft (353-380 N·m).

3.

Tighten locknuts (3) 60-70 lb-ft (81-95 N·m).

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