Paccar CARCO 50B, Service Manual

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27
WINCH REMOVAL AND INSTALLATION
Before starting any repair procedures, be sure to thor-
oughly clean the parts to be removed and adjacent areas
on the tractor to avoid entry of dirt into the winch. Do not
leave any ports or access openings exposed to the
weather. Seal or cap the openings to prevent entry of
dust, moisture or other foreign material. Cap or plug all
exposed hydraulic ports and fittings.
During disassembly, care should be taken not to damage
gaskets, shims, seals and o-rings that are to be reused.
Replace any such parts that are damaged or otherwise
defective. Certain o-rings and seals specified in the
replacement instructions must not be reused. In general,
seals and o-rings that work under operating hydraulic
pressures, or that require extensive disassembly to
replace, should be replaced with new parts at time of
reassembly.
During assembly, use a suitable thread sealing com-
pound on all capscrews that penetrate the winch case.
Take care to prevent excess sealing compound from
entering the winch case.
Maintain strict cleanliness during rebuild to prevent entry
of dirt or moisture into winch case. Hydraulic components
should be rebuilt under the cleanest possible conditions.
WINCH REMOVAL
Place tractor and winch in level position and drain oil from
winch into a suitable container. Install drain plug securely
after oil has been completely drained.
Disconnect the wire harness from the winch electrical
connector.
Discharge the accumulator oil supply BEFORE remov-
ing any hydraulic lines or servicing winch. Personal
injury may result from sudden release of oil pressure.
To discharge the accumulator, stop the engine, turn the
tractor switch ON, then slowly cycle the joystick lever
into full REEL-IN and REEL-OUT positions a minimum
of five (5) times. The tractor electrical system
MUST be
ON during this procedure.
Two (2) 1 in. - 7 UNC threaded holes are provided in the
top of the winch case for installing lifting eyebolts. Make
certain eyebolt has a minimum of 1.25 in. (32 mm) of
thread engagement.
Support the winch with a suitable hoist and remove the
fasteners securing the winch to the tractor adapters.
Move the winch away from tractor with caution to avoid
damaging the PTO pilot and shaft. Cover the PTO open-
ing in tractor rear face to prevent the entry of dirt or mois-
ture.
WINCH INSTALLATION
Remove dirt, paint and rust from mounting surfaces of
winch and tractor adapters.
Coat the splines of PTO shaft and couplings with general
purpose grease. Lubricate and install the o-ring(s) on to
winch PTO pilot.
Remove the winch top cover to gain access to the bevel
gears.
Carefully install the winch onto the tractor while guiding
the winch PTO pilot into tractor and slightly rotating the
winch bevel gears by hand to properly align the PTO shaft
splines. Apply Loctite 271 or equivalent to clean, dry
threads of all fasteners. Install the fasteners and tighten
to the recommended torque.
Install the winch top access cover plate and fill the winch
to proper level with recommended oil.
Connect the wiring harness to the winch electrical con-
nector.
Start the tractor and test all functions before placing the
unit into service.
The winch weighs approximately 1,200 lbs (545 kg)
without wire rope or mounting adapters. Make certain
your hoist and all lifting equipment has adequate lifting
capacity.
To prevent serious damage to the winch, do not run the
tractor engine without oil in the winch.
CAUTION
To prevent serious damage to the winch, do not run the
tractor engine without oil in the winch.
CAUTION