TM 10-5410-228-24
2.12.8 Hydraulic Pump Replacement Continued.
(10) Remove and discard O-rings (18 and 19) from elbow (14).
(11) Remove two bolts (20), two lockwashers (21) and two flat washers (22). Discard two
lockwashers (21).
(12) Remove nut (23), lockwasher (24) and two flat washers (25) from bolt (26) securing front
hydraulic mount bracket (27) to hydraulic pump mount (28). Discard lockwasher (24). Pull
front hydraulic mount bracket (27), with hydraulic pump (2) attached, out of ECU engine
compartment.
b. Disassembly (Refer to Figure 2-14)
(1)
Remove screw (29), flat washer (30) and two washer spacers (31) securing pump pulley (32) to
hydraulic pump (2). Remove pump pulley (32) from hydraulic pump (2) using mechanical puller.
(2)
Remove key (33) from shaft of hydraulic pump (2).
(3)
Remove two screws (34), two lockwashers (35) and two flat washers (36) securing hydraulic
pump (2) to hydraulic pump mount (27). Discard two lockwashers (35).
(4)
Remove two screws (37), two flat washers (38), screw (39), screw (40) and external tooth
lockwasher (41) securing front hydraulic mount bracket (27) to ECV engine block. Discard
external tooth lockwasher (41).
(5)
Remove bolt (26) from hydraulic pump mount (28).
(6)
Remove nut (42), lockwasher (43), flat washer (44) and J-bolt (45) from hydraulic pump mount
(28). Discard lockwasher (43).
NOTE
Further disassembly is not necessary unless replacing items 28, 46, 47, 48, 49, 50, 51 or 52.
If any of these items are replaced, hydraulic pump pulley will have to be aligned.
(7)
Remove two nuts (46), two lockwashers (47) and two flat washers (48) from threaded rod (52).
Discard two lockwashers (47).
(8)
Remove two nuts (49), two lockwashers (50), two flat washers (51) and threaded rod (52) from
hydraulic mount (28). Discard two lockwashers (50).
c.
Assembly (Refer to Figure 2-14)
NOTE
If items 28, 46, 47, 48, 49, 50, 51 or 52 were replaced, hydraulic pump pulley alignment will
have to be accomplished.
(1)
Apply anti-seize compound (Item 13, Appx C) and install threaded rod (52), two flat washers
(51), two new lockwashers (50) (Item 30, Appx E) and two nuts (49) on hydraulic mount (28).
(2)
Install two flat washers (48), two new lockwashers (47) (Item 30, Appx E) and two nuts (46) on
threaded rod (52).
(3)
Install flat washer (44), new lockwasher (43) (Item 28, Appx E), nut (42) and J-bolt (45) on
hydraulic mount (28). Do not tighten nut (42).
(4)
Install bolt (26) and flat washer (25) on hydraulic pump mount (28).
(5)
Secure hydraulic pump mount (28) to ECV engine block with two screws (37), two flat washers
(38), screw (39), screw (40) and new external tooth lockwasher (41) (Item 38, Appx E).
(6)
Secure hydraulic pump (2) to hydraulic pump mount (27) with two screws (34), two new
lockwashers (35) (Item 30, Appx E) and two flat washers (36).
(7)
Install key (33) on shaft of hydraulic pump (2).
(8)
Apply antiseize compound (Item 13, Appx C) to pump pulley (32).
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