Steering Cylinder - TM-10-3930-624-340082

spline, and 6 on the rotor. Alinement will he

seal ring (11) from the piston (13). Remove the rod

correct in 6 positions and incorrect in 6

seal (14) from the rod (15).

positions. If the drive and the rotor slip out of

(6) If the grease fitting (16) is damaged,

position during assembly into the control valve

replace it.

unit. make sure to realine them correctly.

(7) If the bushing (17) requires replacement,

press it out with a suitable tool or arbor press.

(21) PIace the spacer (30) in position in the

rotor. If the spacer does not fit flush with the

surface of the rotor. the drive has not properly

engaged the warning pin. If the spacer fits flush.

place the end cap (29) in position on the assembly

and install two capscrews (28). Tighten them only

finger-tight to maintain alignment of the parts.

(22) Install the remaining capscrews (28) and

tighten them gradually and evenly to a torque valve

of 150 in. lbs.

(23) Reassemble the steering column (13-27),

the steering wheel (12) and the horn button

assembly, (1-10) by reversing the disassembly

procedure.

(24) Assemble the steering column to the

control valve unit. Rotate the shaft to aline the

s p l i n e s w h i l e b r i n g i n g t h e m o u n t i n g surfaces

together. Use the guide marks made during

disassembly to align the column flange correctly

with the mounting plate. Tighten the capscrews to a

torque of 280 in. Ibs.

f. Installation. Install the steering column and

control valve

unit by reversing the removal

procvedure. Tighten the bottom mounting hardware

first. to prevent stress on the column tube.

1. Lock ring

10. Lock ring

4-19. Steering Cylinder

2. Spacer

11. Seal ring

a. Removal.

3. Lock ring

12. Washer

4. Wiper

13. Piston

(1) Raise the rear of the truck until the

5. Washer

14. Rod seal

cylnder is accessible. Block the truck securely in

15. Rod

6. Seal

position.

7. Head seal

16. Grease fitting

(2) Place a pan under the cylinder ports and

8. Head

17. Bushing

disconnect the hoses from the cylinder. Plug the

18. Tube

9. Lock nut

Figure 4-28. Steering cylinder. exploded view.

cylinder ports and the hoses and tag the hoses for

identification.

(3) Disconnect the power steering cylinder

c. Cleaning. Inspection and Repair.

from the mounting bracket and remove the cylinder

(1) Clean the metal parts in a suitable solvent

front the truck.

and dry them with compressed air. Wipe the seals

b. Disassembly.

clean. using hydraulic oil as a solvent.

(1) Remove the lot-k ring (1. fig. 4-28)

(2) Inspect the tube bore, rod. head and piston

securing the spacer (2) in position and remove the

for cracks. scratches. scoring or other damage, and

spacer.

excessive wear. Inspect the seals for damage or

(2) Remove the lock ring (3) securing the head

excessive wear.

(8) in the tube (8) and remove the head (8) from

(3) Slight imperfections can he cleaned up

the tube (18) by pulling out the rod and piston

with a polishing stone. Replace any damaged or

assembly.

excessively worn parts.

(3) Carefully slide the head (8) off the rod

d. Reassembly. Reassemble

the cylinder by

(15). Remove the rod wiper (4), washer (5). and

reversing the disassembly procedure. Lubricate the

seal (6) from the head (8).

cylinder parts with a light coating of hydraulic oil.

(4) Remove the nut (9) securing the piston

Be careful not to damage seals against threads or

(13) to the rod (15). Slide, the piston (13) off the

sharp edges during reassembly. When installing the

rod (15).

head assembly, compress the lock ring. Keep it

(5) Remove the washers (10 and 12) and the

4-32