0071 00-2
TM 5-5420-278-24&P
0071 00
PUMP MAINTENANCE (Contd)
NOTE
Disassembly and assembly of pumps are the same. Only one pump
is shown.
DISASSEMBLY
WARNING
Accidental or intentional introduction of liquid contaminants into the
environment is in violation of state, federal, and military
regulation. Refer to Army POL (WP 0001 00) for information
concerning storage, use, and disposal of these liquids. Failure to do so
may result in injury or death.
NOTE
Have container ready to catch fluid.
1.
Remove cotter pin (86), washer (85), and pin (2) from pump lever (1) and piston rod (79). Discard
cotter pin (85).
2.
Remove nut (4), washer (3), screw (75), and pump lever (1) from piston rod (79) and between two straps (9).
3.
Remove cotter pin (6), nut (5), screw (76), washer (77), and spacer (84) from between two straps (9).
Discard cotter pin (6).
4.
Remove nut (8), washer (7), screw (78), and two straps (9) from lever support (83).
5.
Remove four screws (10), lockwashers (11), and lever support (83) from valve block (55). Discard
lockwashers (11).
6.
Remove knob (24) from control lever (23).
7.
Remove spring pin (21), control lever (23), and spring (36) from control block (22).
8.
Remove spring pin (20) and control block (22) from spool valve assembly (18).
9.
Remove four screws (37), lockwashers (38), spool valve cover (39), O-ring (19), spool valve
assembly (18), and O-ring (17) from valve block (55). Discard lockwashers (38) and O-rings (17) and (19).
10.
Remove two screws (14), lockwashers (15), and plate (16) from bottom of valve block (55). If necessary,
remove four drivescrews (12) and instruction plate. Discard lockwashers (15) and drivescrews (12) if
removed.
11.
Remove test connector (12) and O-ring (13) from valve block (55). Discard O-ring (13).
12.
Remove cap nut (62), gasket (61), nut (60), gasket (59), screw (58), pressure spring (57), and case
valve (56) from valve block (55). Discard gaskets (59) and (61).
13.
Remove threaded ring (73) from piston housing (68).
14.
Remove scraper ring (74) from threaded ring (73). Discard scraper ring (74).
15.
Remove O-ring (72), sleeve (71), O-ring (70), piston rod (79), and O-ring (69) from piston housing (68).
Discard O-rings (70), (69), and (72).
16.
Remove check valve (80) from end of piston rod (79).
17.
Using spanner wrench, remove piston housing (68) and O-rings (63) and (64) from valve block (55).
Discard O-rings (63) and (64).
18.
Remove check valves (65) and (66) from piston housing (68).
19.
Remove two screws (49), washers (50), angle (48), and plate (51) from bottom of valve block (55).
20.
Remove four screws (67), valve block (55), and two O-rings (52) from pump reservoir (40). Discard
O-rings (52).
21.
Remove fill plug with dipstick (26) and gasket (25) from pump reservoir (40). Discard gasket (25), if
damaged.
22.
Remove cap nut (27), gasket (28), nut (29), gasket (30), screw (31), pressure spring (32), and case
valve (33) from valve housing (34). Discard gaskets (28) and (30).
23.
Remove valve housing (34) and gasket (35) from pump reservoir (40). Discard gasket (35).
24.
Remove screw plug (42) and gasket (41) from pump reservoir (40). Discard gasket (44).
25.
Remove four screws (46), lockwashers (47), access cover (45), and O-ring (44) from pump
reservoir (40). Discard lockwashers (47) and O-ring (44).
