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Page Title:
TSUM - 2-028 Lower Winch Function Check Part 1 |
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 TM 5-5420-279-23
Lower W inch
does not operate
All Maintainer Tasks
W ARNING
CRUSH INJURY. BEFORE CARRYING OUT
TROUBLESHOOTING INVOLVING SV10, A
CAUTION
SUSPENDED OR PART BUILT BRIDGE M UST
W hen checking function of
BE M ADE SAFE EITHER BY COM PLETING THE
Select Bridge Lift
winches by paying out rope allow
BUILD OPERATIONS IN BACK-UP M ODE OR
function on chest
ONLY SUFFICIENT SLACK to
BY RETRIEVING THE BRIDGE.
pack.
dem onstrate correct functioning.
Operate joystick to
CRUSH INJURY. A SUSPENDED BRIDGE W ILL
DO NOT ALLOW SLACK rope to
Bridge Lower
M OVE IF SV10 IS M ANUALLY OPERATED AND
becom e caught on other parts of
NOTE CAUTION
THE CHEST PACK RIGHT-HAND JOYSTICK IS
the equipm ent or becom e
M OVED FROM THE CENTRAL POSITION
incorrectly positioned on sheave
CAUSING ACTIVATION OF OTHER SOLENOID
blocks etc.
VALVES.
Does
No
Yes
winch rotate to
pay out
Carry out electrical checks on
Operate joystick to
solenoid valves SV5, SV10 on
rewind rope
Launch Fram e Pilot Manifold,
NOTE W ARNING
and SV13a, SV14a, SV15a &
PV1b on Launch Fram e W inch
Carry out electrical checks on
Control Manifold
solenoid valves SV5, SV10 on
Does
Launch Fram e Pilot Manifold,
No
winch rotate to
NOTE W ARNING
wind in
and SV13a, SV14a, SV15a &
PV1b on Launch Fram e W inch
Control Manifold
Ensure LED & MIMIC panel
indications correspond to
Yes
energisation chart, in Appendix G
Fault cleared
Fit pressure
gauge to TPB1 on
Ensure LED & MIMIC panel
Fit pressure gauge to TPB2 on
W inch Control
indications correspond to
W inch Control Manifold. Operate
Manifold. Operate
energisation chart in Appendix
joystick to Lower
joystick to Bridge
Raise
Does
gauge read P less than
Go to Part
Go to Part
No
3190 psi (22000
2
4
kPa)
Yes
Check winch for m echanical
fault or jam m ing. See -10 chapter 9. If
required, replace lower winch assem bly.
See m aintenance procedure 6-016
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