Troubleshooting - BRADEN PD12C Series Installation Maintenance And Service Manual

OIL CAPACITIES: (PD12C/PD15B) 01, 02 & 22 DRUM - 6 PINTS
NOTE: Capacities are approximate. Refer to "Oil Level" earlier in this section
WARNING
! !
CAUTION
TROUBLE
A
The winch will not lower the load or not
lower the load smoothly.

TROUBLESHOOTING

If a winch ever exhibits any sign of erratic operation, or load control difficulties (i.e. load creeping or
chattering) appropriate troubleshooting tests and repairs should be performed immediately.
Continued operation in this manner may result in property damage, serious personal injury or death.
PROBABLE CAUSE
1. The problem could be a plugged or
loose pilot orifice. The pilot orifice 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 operation.
2. The friction brake may not be releasing
as a result of a defective brake cylinder
seal.
NOTE: If the brake cylinder seal is
defective you will usually find oil leaking
from the winch vent plug.
3. Friction brake will not release as a
result of damaged brake discs.
– 11 –
04, 05 & 23G DRUM – 7 PINTS
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
approximately .020 inches. Clean and
install the pilot orifice tightly in the brake
valve.
Check brake cylinder seal as follows:
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 cylinder should be
disassembled for inspection of the
sealing surfaces and replacement of the
seals. Refer to "Motor Support-Brake
Cylinder Service".
Disassemble brake to inspect brake
discs.
described in "Motor Support-Brake
Cylinder Service".
(PD17A) - 14 PINTS
REMEDY
of the orifice
Check stack-up height
is
as