TM-9-2320-273-34

TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

DECEMBER 1980

TM-9-2320-273-34 - Page 606 of 801

TM9-2320-273-34

CHAPTER 16

REPAIR OF STEERING SYSTEM COMPONENTS

Section 1. STEERING GEAR

16-1. Description. The steering gear is an integral steering unit incorporating a hydraulic control valve, a

hydraulic power cylinder, and a manual steering mechanism. The unit is identical on M915 thru M920

vehicles.

NOTE

For on the vehicle replacement of the

steering gear input and output seal refer

to section V of this chapter.

I

16-2. Removal.

a. Preparation.

(1)

Remove left front fender refer (TM 9-2320-273-20).

(2)

Drain the steering gear system by disconnecting hydraulic fluid lines (4 and 5, fig. 16-1)

at the gear case.

(3)

Thoroughly clean the area around the hydraulic fittings.

b. Procedure.

(1)

Remove bolt (7), Iockwasher (3), and nut (2) from the lower steering column universal

(6) at the gear case.

(2)

Remove the pitman arm clamp retaining nut (8) and bolt (12).

(3)

Put alinement marks on the end of the sector shaft (13) and the pitman arm (11) to

facilitate reassembly. Using a pitman arm puller, remove the pitman arm (11) from the steering gear

sector shaft (13).

NOTE

The steering gear weighs 105 Ibs (48 kg).

(4)

Remove the four mounting nuts (16), washers (15), (17) and bolts (14), then remove the

gear case (1). Drain remaining oil from the gear case.

NOTE

Service of the steering gear assembly at

the Direct Support/General Support level

is limited to replacement of the entire

unit only.

Change 1

16-1