Paccar CARCO 50B, Service Manual

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38
Install the remaining bevel gear assembly over the
inner bearing races.
Lubricate and install two needle bearings (8) between
the bevel gear and bearing races.
Assemble the remaining thrust bearing, as described
earlier, and install it onto the clutch shaft.
Lubricate and install an o-ring (19) and back-up ring
(23) into the inner groove of the shaft, with the back-
up ring placed next to splined thrust bearing spacer
(25).
Install a clutch assembly onto the shaft, aligning the
splines of the clutch friction discs with the splines of
the bevel gear. Seat the clutch over the o-ring and
back-up ring in the inner groove of the shaft.
Lubricate and install an o-ring (19) into the outer
groove of the clutch shaft and seat into the clutch
housing. Install the back-up ring (23) next to the o-
ring.
Install spacer (32) over the clutch shaft, next to the
clutch assembly. The spacer will hold the o-ring and
back-up ring into the clutch housing.
Install the first reduction pinion gear (28) onto the
clutch shaft next to the spacer.
Install bearing cone (5) onto the shaft. Press the
bearing cone firmly against the pinion gear (28) until
no clearance remains between any of the compo-
nents of the clutch shaft.
Install the rotary seal shaft (24) and retainer (22) into
the end of the clutch shaft. Install the bearing retain-
er with the large diameter (flat) side toward the bear-
ing cone. Apply Loc-tite 271 or equivalent to the
threads and pilot shoulder of the shaft and tighten to
40 lb•ft (54 N•m) torque. Tighten the current design
to 130 lb•ft (175 N•m) torque.
INSTALLATION
Place the lifting sling between the bevel gears and
install the clutch shaft assembly into winch case
through the brake opening. Carefully slide the assem-
bly into the center of the winch case where the bevel gear
bearing carriers (31) are supported by the winch case.
All 50B/70A winches are fitted with a rollpin (38) driven
into outside surface of the bevel gear bearing carriers
(31). These rollpins must be aligned with grooves
machined in the inner case bores.
Lubricate and install three o-rings (16) into grooves of the
winch case oil ports on the brake side.
Lubricate and install three (3) more o-rings (16) into
grooves of the brake housing oil ports.
Use the shim set (34) removed during disassembly or a
new shim set of the same thickness. Position shim set
over the brake housing, aligning oil ports.
Lubricate and install o-ring (18) into the groove around
the brake housing.
Install the brake housing and shim set into the winch case
carefully aligning the oil ports. Make certain that all of the
brake friction discs have engaged the brake hub (29)
before installing capscrews.
Tighten to 75 lb•ft (102 N•m) torque.
Lubricate and install o-ring (16) into groove of winch case
oil port and into groove of bearing carrier (35).
Use the original shim set or a new shim set of the same
thickness. Position the shim set over the bearing carrier,
aligning the oil port and bolt holes.