Legend for Fig. 3-14:
1 Hex nut
2 Lock washer
3 Hex head capscrew
4 Cotter pin
5 Link to handle pin
6 Cotter pin
7 Valve handle
8 Handle link
9 Handle screw
10 Handle bracket
11 Wiper seal
12 Machine screw
13 Lockwasher
14 Bonnet
15 Collar stop
16 Spool collar
17 Spool seal
18 Check plug
19 O-ring
20 Outer hack up washer
21 O-ring
22 Inner back up washer
23 O-ring back up washer
24 O-ring
25 Poppet
26 4-way spool
27 Plain hex nut
28 Valve retaining stud
29
Valve housing
30 Seal
31 Seal
32 Valve cover
33 Closed center plug
34 Seal
35 Back up washer
36 O-ring
37 Cover plate
38 Relief cap
39 Spring
40 Shim
41 Shim
42 Shim
43 Poppet
44 Piston ring
45 O-ring
46 Relief valve body
47 O-ring
48 Back up seal
49 O-ring
50 Plain hex nut
51 Lockwasher
52 Hex head capscrew
53 Control valve bracket
3-23. Hydraulic Control Valve Cleaning, In-
spection and Repair
a. Cleaning.
(1) Clean all
parts except O rings with
cleaning solvent (Fed Spec PD 680) and dry
thoroughly.
TM 5-3820-241-34
(2) Discard and replace all O-rings and seals.
b. Inspection and Repair.
(1) Inspect all spools for excessive wear,
nicks or burrs. Remove light scratches with a fine
polishing cloth. If defective replace the spool and
body in matched sets.
(2) Inspect all hardware and threaded areas
for crossed threads. Retap threaded holes or
replace part. Replace all defective hardware.
(3) Inspect all spring, back up rings, and
snap rings for cracks or breaks.
(4) Repair by replacement of defective parts.
3-24. Hydraulic Control Valve, Reassembly and
Installation
a. Reassembly.
(1) Coat all parts with a light coat of
hydraulic oil before reassembly.
(2) Reassemble the hydraulic control valve in
the reverse of numerical sequence as illustrated in
figure 3-14.
b. Installation.
(1) Install the hydraulic control valve in
reverse of numerical sequence as illustrated in
figure 3-13.
(2) Refer to LO 5-3820-241-12 and service the
hydraulic reservoir.
3-23
