MAIN CONTROL VALVE ASSEMBLY REPAIR - continued

TM 10-3930-673-34

16-4. MAIN CONTROL VALVE ASSEMBLY REPAIR (CONT)

(e)

If removed, install plug (56) in

housing section (43).

(f)

Install preformed packings (55) on

spool caps (54).

(g)

Install two spool caps (54) and

screws (53) on housing sections (42

and 43).

(h)

If removed, install plug (52) in inlet

housing (51).

(i)

Install three preformed

packings (46) in housing

sections (42 and 43) and inlet

housing (51).

(j)

Install two poppets (45) and

springs (44) in each face of housing

sections (42 and 43).

(k)

Use match marks on outlet

housing (41), housing sections (42

and 43), and inlet housing (51) and

TR00994

install them in proper order on

studs (49 and 50).

(l)

Install two nuts (47), one nut (48), two nuts (39), and one nut (40) on studs (49 and 50).

Tighten nuts (40 and 48) to 74 lb-ft (100.33 Nm) and nuts (39 and 47) to 48 lb-ft (65.08 Nm).

(2)

Assemble parts (21 through 38) and

install two relief valves (20) in main

control valve.

(a)

Install preformed packing (38) on

body (37).

(b)

Install preformed packing (33) on

poppet (35). Install back-up

ring (34).

(c)

Install poppet (36), poppet (35),

piston (32), and spring (31) into

body (37).

TR00991

(d)

Install preformed packings (28 and

30) onto plug (27).

(e)

Install back-up ring (29) and plug (27) in body (37).

16-20