b. Inspect all parts of the steering gear for
2-14. Hydraulic Pump, Installation
cracks breaks or excessive wear.
a. Install pump gear (19, fig. 2-1) in sleeve (20)
2-17. Steering Gear, Installation
and secure gear with retaining ring (18).
b. Coat new packing (17) with grease (GAA) and
a. Lift complete steering gear into position on
install packing on shaft of pump (16).
truck. Support steering gear in position and secure to
c. Align pump shaft with splines in pump gear
bracket with two mounting screws (fig. 2-2) and lock
(19) and with mounting holes in gear cover and install
pump (16) on gear cover. Secure pump with screws (14)
b. Install upper clamp (fig. 2-2) on shift lever
and lock washers (15).
bracket and secure with two screws and lock washers.
d. Install new packing (13) and elbow (12) in
Do not tighten screws completely.
pump (16). Remove plugs and connect outlet hose (11)
c. Install steering column clamp (fig. 2-2) and
e. Install new packings (8 and 10) and check
slide screw through clamp and pivot on support. Install
nut and lock washer.
valve (9) and elbow (7) on pump (16). Remove plugs
d. Check alignment of steering and shift
and connect steering hose (6) to elbow.
f: Coat packing (4) with oil (OE/HDO) and
columns and tighten clamps.
e. Remove plugs and caps and connect five
connect suction tube (5) to pump. Secure tube with
flanges (3), screws (1) and lock washers (2).
steering cylinder hoses (fig. 2-2) to steering gear valve.
g. Remove blocking and lower truck to floor.
f. Refer to TM 10-3930-630-12 and fill and bleed
h. Fill hydraulic system if necessary and bleed
hydraulic system. Operate truck and check steer- ing
system for leaks.
system (TM 10-3930-630-12). Operate truck and check
g. Install floor and toe plates (TM 10-3930-630-
hydraulic system for leaks.
2-15. Steering Gear, Removal
2-18. Engine and Transmission Removal
a. General. The steering gear valve is mounted
a. The engine is installed in a compartment
at the base of the steering column. Hoses connected to
the valve carry hydraulic oil from the pump and to the
below and to the rear of the operator's seat. The torque
convertor and transmission are directly coupled to the
engine flywheel. Support for the engine is supplied by
brackets at each side of the flywheel housing and at the
(1) Refer to TM 10-3930-630-12 and
center of the fan end of the engine.
remove the floor and toe plates.
b. Refer to TM 10-3930-630-12 and perform the
(2) Refer to TM 10-3930-630-12 and
disconnect horn wire at the horn.
(1) Remove body panels and hood.
(3) Disconnect five hoses (fig. 2-2) from
(2) Remove operator's seat.
steering valve. Plug hose ends and cap elbows in valve.
(3) Remove radiator and fan belts.
(4) Remove screw, lock washer, and nut
(4) Tag and disconnect wiring.
securing steering column clamp (fig. 2-2) to support.
(6) Remove air cleaner.
(5) Remove two screws and lock washers
(7) Disconnect fuel lines.
securing upper clamp (fig. 2-2) to shift lever bracket and
(8) Disconnect throttle linkage.
(9) Disconnect choke control.
(6) Support steering gear and remove two
(10) Drain transmission and disconnect filter
mounting screws (fig. 2-2) and lock washers securing
gear valve to bracket. Carefully lift steering gear, with
(11) Disconnect drive shaft.
steering wheel and column attached, up and out of
(12) Remove stop and taillights.
truck, Place steering gear on a clean work surface.
c. Refer to paragraph 2-12 and remove
2-16. Steering Gear, Cleaning and Inspection
d. Refer to figure 2-3 and disconnect the
a. Clean steering gear components
cleaning solvent, (Fed. Spec. P-D-680).