Chevrolet 70 1969 Series, Shop Manual

Page: 440 / 913

T R A N SM ISS IO N S A N D CLUTCHES 7E-35
Figure 5 — Release Bearing and Support Assem bly
(Type Used with Release Fork)
provide initial lubrication to support. Also lubri­
cate clutch cross shaft bushings, using fitting at
each side of clutch housing.
P IL O T B E A R IN G
Corrosion or roughness on either the race or
balls can be detected by rotating bearing inner
race with finger.
Removal
Remove clutch pilot bearing assembly from
engine, using pilot bearing remover (J-5901-2)
with slide hammer (J-2619).
With fingers on
Figure 6— Clutch Release Mechanism (Yoke Type)
puller closed, insert fingers through bearing inner
race as far as they will go, then tighten thumb
screw to spread fingers. Slide weight sharply
against stop on puller shaft to remove bearing.
Installation
1. Pack clutch pilot bearing with small quan­
tity of high temperature lubricant specified in
L U B R IC A T IO N (SEC. 0) of this manual.
2. With shielded side of bearing toward the
rear, drive pilot bearing into position using a
suitable driver. Bearing should be seated firmly.
F L Y W H E E L
If either flywheel, intermediate drive plate,
or clutch pressure plate is found to be scored,
burned, warped or worn, these components are
to be replaced. Machining for repair is N O T
recommended.
D R IV E N DISC(S)
Inspect driven disc assembly for worn, loose,
and grease or oil-soaked facings. Check for
broken springs, loose rivets, or cracks in the
driven disc hub. Examine splines in hub for wear
and make sure they slide freely on splines of the
main drive gear. If any wear or damage is
evident, replace with a new driven disc assembly.
If hub and springs are in good condition, but
facings are worn or oil-soaked, replace facings.
IN T E R M E D IA T E D R IV E P L A T E
N O T E : Intermediate drive plate (fig. 2) is
used only on dual-disc clutch assemblies.
1. The intermediate drive plate must be re­
placed if:
a. Friction surface is severely heat checked
or scored.
b. It is warped in excess of 0.015".
N O T E :
A heat checked, scored, or warped
intermediate drive plate will cause the disc to
disintegrate quickly.
2. Clearance between driving lugs on the fly­
wheel and intermediate plate must be 0.006" to
0.012" as shown in figure 7.
P R E SS U R E P L A T E A N D C O V E R A S S E M B L Y
Detailed inspection and repair procedures for
the pressure plate and cover assembly are cover­
ed in the Overhaul Manual.
C L U T C H IN S T A L L A T IO N
(Refer to Figures 1 and 2)
The following procedures apply to all clutches
with exceptions as noted:
1. Be sure the wood blocks (fig. 3) or hold-
down bolts and washers (fig. 4) are installed in the
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L