SECTION V: TROUBLESHOOTING
TM 9-2350-256-20
H If hoist winch creeps or fails to hold load, adjust
brake. Open door of U-35 winch center right floor
plate (see paragraph 9-4). Loosen locknut (see
paragraph 11-7) and tighten hoist winch adjusting
screw clockwise as far as it will go.
Back off
adjusting screw one full turn. Hold adjusting screw
in position and tighten locknut. lf brake fails to hold
load, go to step I. If brake holds load but continues
to creep, notify Direct Support maintenance.
I Remove hydraulic brake cylinder hose No. 28 and
inspect for restriction (see paragraph 12-1). Replace
restricted or damaged hose (see paragraph 12-1). If
no hose restriction or damage exists and brake still
fails to hold load, go to step J.
Do not attempt to loosen or tighten
hydraulic fittings or lines when system is
pressurized. Severe injury or death to
personnel may result.
J If quick disconnect between hydraulic line, hose
number 22, and hydraulic line hose number 22A is
dirty or damaged, clean or replace quick disconnect
as necessary (see paragraph 12-1). If no quick
disconnect damage is present and hoist winch still
creeps or fails to hold load, notify Direct Support
Maintenance.
HOISTING BOOM
Hoisting boom does not operate.
Do steps A through F.
Hoisting boom creeps.
Do steps J and K.
Hoisting boom operates with difficulty.
Do steps C through J.
Boom stayline cables become slack during live boom
operation.
Do step L.
NOTE
The hoisting
boom troubleshooting
procedures are performed using the main
hydraulic system as a fluid power source. If
hoisting boom operates using main
hydraulic but not auxiliary hydraulic,
troubleshoot auxiliary hydraulic system. If
hoisting boom operates using auxiliary
h y d r a u l i c b u t n o t m a i n h y d r a u l i c ,
troubleshoot main hydraulic system.
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