TM 5-5420-280-10
0048 00
PALLET MAINTENANCE PROCEDURES (Contd)
HYDRAULIC WINCH GEARBOX
NOTE
Winch oil level is normally checked only if leaking is
evident. Notify field maintenance to remove/install plugs.
Perform step 1 if draining oil from winch gearbox.
1. Remove drain plug (13) from hole (12) and allow oil to drain from winch
gearbox (9). Install plug (13) on hole (12).
2. Remove full-level plug (7) from hydraulic winch gearbox (8). Observe that oil level
is even with bottom of hole (11). Perform step 3 if oil level is below hole (11).
3. Remove fill plug (8) from hole (10), and fill gearbox (8) with gear oil until oil
runs out of full-level hole (11). Install plug (8) on hole (10). Refer to item 14,
4. Install full-level plug (7) on hole (11) of hydraulic winch gearbox (9).
HYDRAULIC RESERVOIR
1. If oil level in hydraulic reservoir (3) is below halfway on site glass white
indicator (4), remove auxiliary reservoir cap (6) from auxiliary reservoir (5).
2. Add oil to auxiliary reservoir (5) until level is halfway on hydraulic reservoir (3)
site glass white indicator (4). Refer to item 11, WP 0052 00.
3. Install auxiliary reservoir cap (6) on auxiliary reservoir (5).
FORWARD PINWHEEL GEARBOX
1. Remove fill plug (17) and O-ring (16) from forward pinwheel gearbox (14).
Discard O-ring (16).
2. Fill forward pin wheel gearbox (14) to bottom of fill plug hole (15) with gear oil.
Refer to item 14, WP 0052 00.
3. Install new O-ring (16) and fill plug (17) on forward pinwheel gearbox (14).
REAR PINWHEEL GEARBOX
1. Using control valves KY1 and KY18, manually lower pallet launch boom (21)
until horizontal (0-degree position). Refer to WP 0007 00.
2. Remove fill plug (19) and O-ring (18) from rear pinwheel gearbox (20). Discard
O-ring (18).
3. Fill rear pinwheel gearbox (20) to bottom of fill plug hole with gear oil. Refer to
item 14, WP 0052 00.
4. Install new O-ring (18) and fill plug (19) on rear pinwheel gearbox (20).
5. Using control valves KY1 and KY19, manually raise and secure pallet launch
boom (21) in vertical (+90-degree position). Refer to WP 0007 00.
0048 00-4
