TM 5-5420-280-23&P
0094 00
LAUNCH BOOM SWIVEL DRIVE REPLACEMENT (Contd)
REMOVAL
1.
Start Launch Power Unit (LPU) or CBT, remove retaining pins from launch boom and depress KY1
and KY18 control valves simultaneously to lower launch boom to -90-degrees position. Release
control valves and shut down LPU.
WARNING
Launch boom is very heavy and must be supported before
disconnecting hydraulic hoses or tubes. Failure to comply may
result in injury or death to personnel.
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.
2.
Disconnect steel tubes (3) and (14) and tube seals (2) from elbows (4) and (13) and tee fitting (15) on
launch boom swivel drive (8). Discard tube seals (2).
3.
Disconnect hoses (12) and (26) from elbows (11) and (27) on swivel drive (8).
4.
Remove four locknuts (19), washers (18), and screws (7) from bracket (23) and swivel drive (8).
Discard locknuts (19).
5.
Attach lifting device and sling or chain to swivel drive (8) and remove screw (20), lockwasher (21),
washer (22), and bracket (23) from standoff bracket (31). Discard lockwasher (21).
NOTE
Note position of swivel drive shaft and bearing shaft for
installation.
6.
Pull swivel drive shaft (30) out of bearing shaft (32) and remove swivel drive (8) from
pallet frame (1).
7.
Remove elbow (4), adapter (5), and O-ring (6) from swivel drive (8). Discard O-ring (6).
8.
Remove elbow (11), adapter (10), and O-ring (9) from swivel drive (8). Discard O-ring (9).
9.
Remove elbow (13), tee fitting (15), adapter (16), and O-ring (17) from swivel drive (8). Discard
O-ring (17).
10.
Remove elbow (27), adapter (28), O-ring (29), reducer (25), and O-ring (24) from swivel drive (8).
Discard O-rings (29) and (24).
11.
Remove sling or chain and lifting device from swivel drive (8).
0094 00-2