Paccar Winch BRADEN BA3A, Installation Maintenance And Service Manual

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18
TROUBLESHOOTING
A
The winch will not lower
the load or will not lower
smoothly 1. Clogged brake release air line or a
malfunctioning Quick Exhaust
valve. On units approved for per-
sonnel handling, an orifice in the
elbow fitting off of the control valve
could be plugged.
2. Defective brake cylinder seal.
3. If the brake was recently rebuilt,
the problem may be improper
assembly.
4. Band brake is not properly adjust-
ed or is dragging on winch drum.
Install a gage into the brake release line down-
stream of the quick exhaust valve and ensure
pressure is greater than 45 psi.
Perform air pressure test. Pressurize the
brake cylinder to 50 – 90 psi. If brake cylinder
will not hold pressure, seal is defective.
Disassemble and inspect the brake. Ensure
proper number of brake plates and friction
discs are used.
Adjust band brake as defined in “Band Brake
Adjustment” section of this manual.
B
Air leaks from the vent
plug 1. Defective brake cylinder seal or
motor shaft seal.
Perform air pressure test. Pressurize the
brake cylinder to 50 – 90 psi and ensure it
holds pressure.
If the brake pressure holds, the problem is the
motor shaft seal. Remove the motor for
inspection of the shaft seal.
TROUBLE PROBABLE CAUSE REMEDY
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. Continue operation in this manner may result in prop-
erty damage, serious personal injury or death.
CAUTION
WARNING
! !