BRADEN C2H150A, Инструкция по установке, обслуживанию и ремонту

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11
TROUBLE SHOOTING
TROUBLE REMEDY PROBABLE CAUSE
CAUTION
WARNING
! !
If a winch ever exhibits any sign of erratic operation, or load control difficulties (i.e. load creeping or chattering) appro-
priate troubleshooting tests and repairs should be performed immediately. Continued operation in this manner may
result in property damage, serious personal injury or death.
A
Disassemble brake to inspect
brake discs. Check stack-up
height as described in “Motor
Support-Brake Cylinder Service”. 3. Friction brake will not release as
a result of damaged brake discs.
Check brake cylinder seal as fol-
lows:
A. Disconnect the swivel tee from
the brake release port. Connect a
hand pump with accurate 0-2000
psi gauge and shut-off valve to
the –4 J.I.C. fitting in the brake
release port.
B. Apply 1000 psi to the brake.
Close shut-off valve and let stand
for five (5) minutes.
C. If there is any loss of pressure in
five (5) minutes, the brake cylin-
der should be disassembled for
inspection of the sealing surfaces
and replacement of the seals.
Refer to “Motor Support-Brake
Cylinder Service”.
2. The friction brake may not be
releasing as a result of a defec-
tive brake cylinder seal.
NOTE: If the brake cylinder seal
is defective you will usually find
oil leaking from the winch vent
plug.
Remove the pilot hose and fitting
from the brake valve, then use a
5/32 inch Allen wrench to remove
the pilot orifice. The diameter of
the orifice is approximately .020
inches. Clean and install the pilot
orifice tightly in the brake valve. 1. The problem could be a plugged
or loose pilot orifice. The pilot ori-
fice is a small pipe plug with a
hole drilled through it, located
behind the pilot port fitting on the
brake valve. If it becomes
plugged, it will prevent the pilot
pressure, from the manifold, from
opening the brake valve. If it
becomes loose, it will allow an
unregulated amount of oil in to
operate the brake valve which
cause erratic brake valve opera-
tion.
The winch will not lower the load
or not lower the load smoothly.