13
WINCH OPERATION
The following warnings and instructions are basic to safe
winch operation. Please read them carefully and follow
them any time the winch is in use. These instructions are
provided in addition to any information provided by the
Original Equipment Manufacturer of the platform the winch
is mounted on. Equipment operators should be completely
familiar with the overall operation of the vehicle to which
the winch is installed. If you have any questions concern-
ing the safe operation of this winch or the equipment to
which it is mounted, contact the equipment manufacturer
that installed the winch, or the PACCAR Winch Division
Product Support Department, as previously defi ned.
The winch directional control valve, described earlier,
controls haul-in and pay-out functions of the winch. Mov-
ing the control lever in the haul-in direction will cause the
winch to pull in the load toward the vehicle. Moving the
control lever in the pay-out direction will cause the winch
to feed wire rope off the drum.
NOTE: During winching operations, it is recommended to
operate the vehicle engine or hydraulic pump drive at high
idle RPM and use the winch control valve to control oil
fl ow, and thus winch line speed as needed.
Position the vehicle such that the centerline of the winch
drum is perpendicular to the winch load whenever pos-
sible. The wire rope fl eet angle must not exceed 1½°. If
the fl eet angle exceeds 1½°, the wire rope will not spool
correctly, eventually resulting in damaged wire rope and
prematurely worn winch components.
Either power out the wire rope using the hydraulic system,
or disengage the drum clutch and pull the wire rope off the
drum by hand (freespool).
Securely attach the wire rope to the load in such a manner
as to avoid damaging the load or rigging. Fully engage the
drum clutch (see Drum Clutch Operation).
Observe the winch operation carefully to make certain all
ground personnel remain clear of the wire rope and load,
and that the load does not shift, which may require reposi-
tioning the wire rope or the vehicle.
Once the load is positioned properly, move the lever back
to neutral to stop the winch. Secure the load as required.
Pay out just enough wire rope to remove all tension on the
cable drum. Disengage the drum clutch and disconnect
the wire rope from the load.
Re-engage the drum clutch. Ensure the drum clutch is fully
engaged. (See drum clutch operation on page 14.)
Wind the wire rope onto the cable drum while maintaining
the minimum fl eet angle and suffi cient tension to allow the
wire rope to spool properly, being careful to keep hands
and clothing away from the cable drum and/or fairlead roll-
ers.
Ground personnel MUST stay in view of the operator
and clear of the load and cable drum at all times. DO
NOT allow personnel near the winch line while under
tension. DO NOT allow personnel near the cable drum
during winch operation. DO NOT allow personnel to be
in line with the load. DO NOT allow personnel to stand
under a suspended load. A safe distance of 1 1/2 times
the working length of the cable should be maintained by
ground personnel. A broken wire rope and/or lost load
may cause property damage, injury or death.
Failure to properly warm up the winch, particularly un-
der low ambient temperature conditions, may result in
temporary brake slippage due to high back pressures
attempting to release the brake, which may result in
property damage, injury or death.
Failure to use the proper type and viscosity of planetary
gear oil may contribute to intermittent brake clutch slip-
page which could result in property damage, injury or
death. Some gear lubricants contain large amount of
EP (extreme pressure) and anti-friction additives which
may contribute to brake slippage and damage to brake
friction discs or seals. Oil viscosity with regard to ambi-
ent temperature is also critical to reliable brake opera-
tion. Testing indicates that excessively heavy or thick
gear oil may contribute to intermittent brake slippage.
Use only approved gear oil. (See page 45.)
If oil is leaking from the vent relief valve (see drawing on
page 19) or winch, immediately remove the winch from
service and determine the cause.
High pressure in the winch may result in property dam-
age, personal injury, or death.
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