Paccar CARCO 50B, Руководство по обслуживанию, Страница: 38 / 61

36
ASSEMBLY
Thoroughly clean and carefully inspect all components
prior to assembly. If a component’s condition is question-
able – replace it!
Due to machining tolerances, installation of any new com-
ponents listed below will alter the original shim pack used
between the bevel gears to establish the required back-
lash between the bevel gears and bevel pinion.
Measurements of components must be taken and used to
establish a new shim pack thickness to maintain the
required .004-. 012 in. (.1-. 31 mm) backlash.
Use the following formula and list of components to be
measured to establish the new shim pack.
Due to machine tolerances, the thickness of the shim
pack must be determined individually for each winch. The
same parts which have been used for measuring must be
used together.
ITEM QTY DESCRIPTION
B1, B2 2 Thrust Bearing Assembly
(Thrust bearing (7) and 2 thrust bear-
ing races (13).
S1, S2 2 Thrust Bearing Shoulder Spacer (25)
S3, S4 2 Bevel Gear Spacer (30)
R1 thru R4 4 Needle Bearing Inner Race (6)
M1, M2 2 Bevel Gear
Shim Pack Thickness:
Z = B1 + B2 + M1 + M2 – S1 – S2 – S3 – S4 – R1 – R2
– R3 – R4
The basic shim pack supplied through Service Parts is
.120 in. (3.05 mm) thick.
Record dimensions M1 and M2, bevel gear mounting dis-
tance. The mounting distance has been etched into the
inside surface of the bevel gears.
50B/70A
Measure and record dimension B1 and B2, thrust bearing
assembly. Each thrust bearing assembly includes: one
thrust bearing (7) and two thrust bearing races (13).
Measure and record dimension S1 and S2, thrust bearing
spacer thickness (25) and S3 and S4 bevel gear spacer
thickness (30).
Measure and record dimension R1, R2, R3 and R4 bevel
gear bearing inner race (6) thickness.
The shim pack thickness, Z, to use in re-assembly of the
clutch shaft is the total mounting distance of the bevel
gears M1 and M2 plus the total thickness of the thrust
bearing assemblies B1 and B2 less the total thickness of
the bevel gear spacers S3 and S4, inner bearing races
R1, R2, R3, R4 and thrust bearing spacers S1 and S2.
M2 M1
B2 B1
S1 R1 R2 S3 S4 R3 R4 S2
Z
Shim Thickness
Mounting Dims. (M1 & M2)
Marked on Gears Here
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