TM 55-1520-240-T
14-1.4 CARGO/RESCUE WINCH SYSTEM OPERATIONAL CHECK
(Continued)
TASK
RESULT
NOTE
Keep tension on wire rope (cable)
when reeling cable. Cable will reel
evenly and will not snarl.
1. Check that HOIST CONT and HOIST
CABLE CUTTER circuit breakers (1 and
2) are closed.
2. Check that winch shift lever (3) is set to
3.
4.
5.
6.
7.
8.
9.
10.
RESCUE.
Hold pressure line (5) to shutoff valve (6).
Set HOIST MASTER switch (7) to
PILOT.
Hold pressure line (8) to brake on winch
(4). Push in and turn pushbutton (9) on
shutoff valve (6). Release pushbutton.
Remove Iockwire from knob (10) on winch
control valve (11).
Turn knob (10) in one direction. Reel out
enough wire rope (cable) (12) to rig. Release
knob. Have helper keap slight dragon ca-
ble. Helper must wear gloves.
Rig winch (4) for rescue mode (TM 56-
1620-240-10).
Turn and release pushbutton (9).
Turn knob (10) in any direction. Release
knob.
Turn HOIST control (13) to OUT.
Release control to OFF when cable (12)
stops reeling out .
NOTE
With cable reeled out, an inspection
for broken strands or definite bends
can be performed.
If either circuit breaker (1 or 2) is open, close it. If
HOIST CONT circuit breaker (1) opens again, go to
task 14-1.5. If HOIST CABLE CUTTER circuit
breaker (2) opens again, go to task 14-1.6.
If lever (3) not at RESCUE, set it to RESCUE. If
lever can not be set to RESCUE, replace winch (4),
Pressure surge should be felt on pressure line (5).
If not, go to task 7-2.4.
Pressure surge should be felt on pressure line (8).
If not, replace shutoff valve (6). Push button (9)
shall remain locked when released. If it comes out,
replace shutoff valve (6).
Cable (12) shall reel off winch (4), if it does not,
turn knob (10) in opposite direction. If cable still
does not reel off winch, replace winch,
Pushbutton (9) shall come out. If it does not, re-
place shutoff valve (6).
Winch (4) shall not operate. If it does, replace
shutoff valve (6).
Winch (4) shall reel out cable (12) within 90
seconds and stop when 2-1/2 wraps of first layer
of cable remain on winch drum. If winch does not
reel out cable, go to task 14-1.7. If cable takes
longer than 90 seconds to reel out, replace winch.
If winch does not stop when 2-1/2 wraps remain
on drum, adjust winch out-limit switch, TM 55-
1520-240-23. If switch can not be adjusted, re-
place winch.
14-1.4
TASK
RESULT
Do not allow cable end to reel in
and jam in a pulley. Damage to
winch, pulley, or airframe can oc-
cur.
11. Turn HOIST control (13) to IN. Release
control to OFF when cable (12) stops
reeling in. Have helper keep slight drag
on cable. Helper must wear gloves.
Winch (4) shall reel in cable (12) wlthin 90
seconds and stop automatically when 26 to
26-1/2 feet of cable remain extended. Cable
length is measured from sta 120 passageway
bulkhead to cable ball end. If winch does not reel
in cable, go to task 14-1.8. If cable takes longer
than 90 seconds to reel in, or cable binds or spools
unevenly, replace winch. If winch stops too soon
ortoo late, (26 - 26-1/2 feet of cable not
?d), adjust rescue in-limit switch, TM 55-
1520-240-23. If switch can not be adjusted, re-
place winch,
GO TO NEXT PAGE
14-7
