TM 5-5420-280-23&P
0086 00
REAR PIN WHEEL DRIVE HYDRAULIC MOTOR REPLACEMENT (Contd)
REMOVAL
CAUTION
Cap or plug all hoses, connections, and openings immediately after
disconnection to prevent contamination. Remove caps or plugs prior
to installation. Failure to do so may result in damage to equipment.
NOTE
Tag hoses for installation.
Have container ready to catch oil.
1.
Start Launch Power Unit (LPU). Remove retaining pins on launch boom (19) and depress KY1 and
KY18 control valves to lower launch boom (19) to 0-degrees position. Release control valves and shut
down LPU.
NOTE
Have container ready to catch oil.
2.
Loosen nut (21) and disconnect hose (20) from adapter (22) on rear pin wheel drive hydraulic motor (1).
3.
Loosen nut (7) and disconnect hoses (8) from adapters (6) on rear pin wheel drive motor (1).
4.
Remove drain plug (18) and O-ring (17) from bottom of gear box (9) and drain gear oil from gear
box (9). Discard O-ring (17).
5.
Remove twelve screws (16), washers (15), cover (14), and O-ring (13) from gear box (9). Discard
O-ring (13)
6.
Remove screw (12), washer (11), and gear (10) from spline shaft (5) on hydraulic motor (1).
7.
Remove four screws (2), lockwashers (3), drive motor (1), and O-ring (4) from gear box (13). Discard
O-ring (4) and lockwashers (3).
8.
Remove adapter (6) and (22) from hyrdraulic motor (1).
INSTALLATION
1.
Install adapters (6) and (22) on hydraulic motor (1).
NOTE
Apply a light coat of gear oil to O-rings and oil seal at installation.
Ensure that all mounting hardware is tightened to metric standards
unless otherwise noted. Refer to metric torque limits in WP 0118 00.
2.
Install new O-ring (4) and hydraulic motor (1) on gear box (13) with four new lockwashers (3) and
screws (2).
3.
Install drive motor gear (10) on spline shaft (5), short end first with washer (11) and screw (12).
4.
Install new O-ring (13) and cover (14) on gearbox (9) with twelve washers (15) and screws (16).
5.
Connect hose (8) on adapters (6) of hydraulic motor (1) and tighten nut (7).
6.
Connect hose (20) on adapter (22) of hydraulic motor (1) and tighten nut (21).
7.
Install new O-ring (17) and drain plug (18) on bottom of gear box (9).
NOTE
Rear pin wheel drive must be set at 0-degrees position when filling
gear box housing.
8.
Remove fill plug and O-ring from end of gear box (9), discard O-ring, and fill gear box (9) with gear
oil until oil comes out of fill plug hole. Install new O-ring and fill plug on end of gear box (9).
NOTE
The pallet hydraulic system is self-bleeding, and with exception of
the telescopic tube hydraulic cylinders, there is no requirement for
bleeding air from the system.
9.
Start LPU, check for leaks and operate hydraulic system and depress KY1 and KY19 simultaneously
to raise launch boom (16) to +90-degrees position. Install retaining pins on launch boom (16).
0086 00-2
