Assembly-continued -706880899

TM 5-4210-233-14&P-1

5-39. STEERING GEAR-Continued

(16)

Position the end cover (31) so that the poppet adjusting screw (28) is aligned with the end of the

poppet (58).

(17)

Install the four end cover bolts (29), 1.625 in. (41 mm) long, and washers (30), and torque the bolts

to 150-170 ft. Ibs. (203-230 N ) if dry, or 108-128 ft. Ibs. (146-174 N ) if lubricated.

(18)

Grease the two new backup O-rings (45) and the two new Teflon seal rings (44). Using seal

installation tool, assemble the backup O-rings and then the Teflon seal rings onto the valve

sleeve (37).

NOTE

Assemble each O-ring and seal ring from the end closest to its

groove.

CAUTION

A minimum of ten minutes with the compression tool in place is

required to ensure that the seal rings are properly seated.

Otherwise, the valve sleeve will be difficult to assemble into the

valve housing, and the seal rings may be damaged during

installation.

(19)

Use compression tool (Appendix B, Section III, Item 83) to compress the Teflon seal rings. Leave

the compression tool on for 10 minutes.

(20)

Assemble the poppet valve adjusting screw (34) and nut (27) assembly into the valve housing (35)

4 or 5 turns.

(21)

Apply clean grease to the valve housing (35) seal ring groove. Install a new valve housing seal ring

(32) into valve housing seal ring groove.

NOTE

When installed, the valve housing seal ring should extend

slightly above the machined surface of the valve housing.

(22)

Apply a generous amount of clean grease to one thrust washer (38). Install the thrust washer into

the valve housing (35), making sure to center the washer.

WARNING

The thrust washer and thrust bearing must be flat and centered

in the counterbore surface, otherwise, the thrust washer could

break when you assemble the valve housing into the gear

housing (18). A broken washer could cause uncontrollable

steering, possibly resulting in an accident.

(23)

Apply a generous amount of clean grease to the thrust bearing (39). Install the thrust bearing into

the valve housing (onto the thrust washer), making sure to center the bearing on the washer.

5-229