Section III. STEERING VALVE UNIT AND HYDRAULIC LINES

TM 10-3930-631-34

(2) Remove lock ring (18), spacer (19) and lock

(4) Inspect bearing (30, fig. 5-3) in tube flange

ring (20). Pull piston rod, with attached parts from

for wear or damage. If bearing is worn or damaged,

press old bearing from tube using new bearing as a pilot.

cylinder tube.

Press new bearing in place.

(3) Remove nut (26), piston (27) and seal (28)

(5) Replace all parts in cylinder which are

from rod (29). Be careful not to scratch piston or rod.

contained in the cylinder repair kit.

(4) Remove head (25) from rod and remove

d. Assembly.

seal (21), packing (22), backup washer (23) and wiper

(24) from head.

(1) Install socket plug (13), spring (12), seat (11)

(5) If drag link has not been disassembled,

and plug (10) in socket (14). Install cotter pin (9) and

remove plug (10), seat (11), spring (12) and socket plug

lubrication fitting (8).

(13) from socket. Remove lubrication fittings (8 and 17)

(2) Install lubrication fitting (17) in tube (31).

from socket and tube.

Install seal (28) on rod (29) and install piston (27) on rod.

c. Cleaning, Inspection and Repair.

Secure piston on rod with nut (26).

(1) Clean all metal parts in cleaning com-

(3) Install rod with piston in cylinder tube. Place

packing (22), backup washer (23) and seal (21) in

pound, solvent (Fed.

Spec.

P-D-680) and dry

grooves in head. Install head in tube over rod.

thoroughly.

(2) Inspect tube bore, rod, head, and piston for

(4) Secure head in tube with lock rings (18 and

cracks, scratches, scoring or other damage. Repair or

20) and spacer (19).

e. Installation.

replace damaged parts.

(3) Inspect socket for cracks, dents and other

(1) Install cylinder anchor (7, fig. 5-3) in position

damage. Check spring. Spring should have a free

on left side of frame and secure anchor with screws (4),

length of 0.7031 inch (17.6 mm). At 210 to 260 pound

lock washers (5) and nuts (6).

load length should be 0.5156 inch (13.1 mm). Replace

(2) Refer to TM 10-3930-631-12 and install

damaged or unserviceable parts.

steering cylinder and drag link.

Section III. STEERING VALVE UNIT AND HYDRAULIC LINES

(1) Refer to TM 10-3930-631-12 and

5-5. Steering Valve Unit

remove

a. Removal. Refer to paragraph 2-11 and

the steering wheel from the valve column.

remove the steering valve unit from the truck.

(2) Remove insulator (1, fig. 5-4) and pull

b. Disassembly.

leads (2 and 3) from the steering column.

5-6