TM 5-1940-322-24
0134 00
SCOOP HYDRAULIC CONTROL VALVE, CONTROL VALVE HOSES,
CONTROL LINKAGE, AND MAIN FRAME BRACKETS MAINTENANCE (Contd)
CONTROL VALVE REMOVAL
1. Remove two locknuts (35), washers (36), screws (4), washers (3), and connecting link (34) from control
link (30) and selector valve plunger (24). Discard locknuts (35).
2. Remove two locknuts (7), four washers (6), screws (28), and control valve assembly (41) from main
frame bracket (5). Discard locknuts (7).
CONTROL VALVE LINKAGE REMOVAL
1. If not removed, remove two locknuts (35), washers (36), screws (4), washers (3), and connecting
link (34) from control link (30) and selector valve plunger (24). Discard locknuts (35).
2. Remove locknut (33), washer (32), and control link (30) from main link pivot pin (18). Discard
locknut (33).
3. Remove nut (43), lockwasher (44), and ball stud (45) from control link (30). Discard lockwasher (44).
4. Remove locknut (11), thick washer (10), and main link (12) from main pivot shaft (8). Discard
locknut (11).
NOTE
Note position of control link on main link to assist with installation.
5. If not removed, remove locknut (14), washer (15), screw (17), washer (16), and control link (13) from
main link (12). Discard locknut (14).
6. Remove locknut (1), washer (2), and main pivot shaft (8) from main frame bracket (5). Discard
locknut (1).
CONTROL VALVE DISASSEMBLY
CAUTION
Ensure control valves are supported during disassembly. Failure to
comply may result in damage to equipment.
NOTE
Mark position of control valve manifold, pilot check valve, and
selector valve to assist with assembly.
1.
Remove four screws (23), lockwashers (22), selector valve (21), four O-rings (19), pilot check valve (20),
and four O-rings (19) from control valve manifold (27). Discard lockwashers (22) and O-rings (19).
NOTE
Note position of adapters during disassembly to assist with
assembly.
2.
Remove three adapters (25), adapter (29), and four seal washers (26) from control valve manifold (27).
Discard seal washers (26).
CLEANING AND INSPECTION
1. For general cleaning and inspection instructions, refer to WP 0013 00.
2. If fiber washers (37) are damaged, remove fiber washers (37) from three studs (38) on hydrojet
housing (39) and replace.
NOTE
If replacing studs, apply coat of sealing compound (272) when
installing.
3.
If stud (38) threads are damaged, remove stud (38) from hydrojet housing (39) and replace.
4.
If main pivot shaft bushings (9) are worn or damaged, remove bushings (9) from main link (12) and
replace.
5.
If pivot pin bushings (31) are worn or damaged, remove bushings (31) from control link (30) and
replace.
0134 00-4
