Paccar CARCO 50B, Service Manual

Page: 51 / 61

49
Temporarily install the idler shaft bearing carrier sub-
assembly (bearing carrier, adjuster and O-ring) into the
winch case to support the outer end of the second reduc-
tion pinion. Apply shop air pressure, approximately 100
PSI (69 kPa), to the freespool cylinder. Adjust the
freespool cylinder stud into the winch case wall as
required to allow the clutch collar to clear the edge of the
pinion teeth, but still maintain maximum tooth contact
while engaged.
Make certain the lube tube is aimed toward the second
reduction pinion gear before installing the second reduc-
tion gear and drum drive shaft assembly. Be sure the tube
will not rub against any gears.
Lubricate the splines of the second reduction gear shaft
with general-purpose grease and install the second
reduction drum drive gear and shaft assembly into the
winch case. Firmly seat the shaft against the retaining
ring in the cable drum bore.
Apply silicon sealant, RTV 730 or equivalent, to the seal-
ing surface of the large diameter second reduction gear
bearing carrier cover and install it onto the winch case.
Apply thread sealant to the capscrews and install them
finger tight. DO NOT tighten the capscrews at this time.
Lubricate and install the O-ring into the groove in the
bearing carrier. Install the threaded adjuster into the bear-
ing carrier until it is lightly seated against the bearing cup.
Apply silicon sealant, RTV 730 or equivalent, to the
mounting surface of the bearing carrier.
Install the bearing carrier to the winch case. Apply thread
sealant to the capscrews and torque evenly to 75 lb•ft
(102 N•m).
Using a pry bar or a screwdriver approximately 18 in.
(460 mm) in length, turn the threaded adjuster clockwise
(CW) until tight. Tap the adjuster with a hammer to seat
the bearing and continue turning the adjuster, then tap-
ping with the hammer, until it can no longer be tightened.
Back the adjuster out, by turning counter-clockwise
(CCW), 1/16 turn maximum (22.5°) and secure in place
with the lockplate and capscrews. Torque the capscrews
to 75 lb•ft (102 N•m).
NOTE: Tightening the threaded adjuster pushes the
bearing cup (outer race) into heavier contact with
the bearing cone, increasing the bearing drag; much
like tightening a wheel bearing nut in an automobile
or truck. The snug fitting bearing cup will not move
outward with the threaded adjuster when the
adjuster is loosened. The winch MUST be operated
under load for a brief period to allow the gear train
load to push the bearing cup outward against the
adjuster before a reduction in bearing drag is
noticed.
i
The second reduction drum drive gear and drum drive
shaft assembly weighs approximately 175 lb. (79 kg).
Use a suitable lifting fixture or sling and take proper pre-
cautions when lifting this assembly to prevent possible
personal injury. If the gear and shaft assembly is not
seated fully into the cable drum as defined, it could
become dislodged and fall from the winch case causing
personal injury.
DO NOT back the adjuster out more than 1/16 turn
(22.5°) as this allows excessive shaft endplay.
Excessive endplay may cause gear train misalignment,
excessive noise and accelerated wear.
CAUTION