Paccar Winch BRADEN BA3A, Installation Maintenance And Service Manual

Page: 21 / 37

19
C
The brake will not hold the
load with the control lever
in neutral. 1. Pressure is trapped in the brake
piston because of a faulty quick
exhaust valve.
2. Friction brake will not hold due to
worn of damaged brake discs.
3. Brake clutch is slipping
Slowly loosen fitting downstream of quick
exhaust valve. Air escaping through loose fit-
ting will verify that the quick exhaust valve is
not bleeding air pressure.
Disassemble brake and inspect brake discs.
Improper planetary gear oil may cause the
brake clutch to slip. Drain the gear oil and
flush with solvent. Completely drain the sol-
vent and fill with planetary gear oil listed in the
“Preventative Maintenance” section of this
manual.
Brake clutch may be damaged or worn.
Disassemble and inspect brake clutch as
described in the “Brake Clutch
D
The winch will not hoist
the rated load. 1. The winch may be mounted on an
uneven or flexible surface which
causes distortion of the winch base
and binding of the gear train.
Binding in the gear train will absorb
horsepower needed to hoist the
rated load and generate heat.
2. Inadequate air system pressure.
3. Layer on the winch drum is not
rated for load.
4. Rigging and sheaves are not work-
ing efficiently.
5. Band brake is not properly adjust-
ed or is dragging on winch drum.
Reinforce mounting surface.
If needed, use shim stock to level the winch.
Refer to “Winch Installation” instructions.
Loosen and then torque mounting bolts to rec-
ommended torque.
Install gage at air motor inlet and check air
pressure.
Refer to winch performance charts in the sales
brochure.
Perform rigging service as recommended by
the crane manufacturer.
Adjust band brake as defined in “Band Brake
Adjustment” section of this manual.
TROUBLE PROBABLE CAUSE REMEDY