Chevrolet 1977 light duty truck Service Manual page 344

Fig. 4A -16--lnstalling Snap Ring to Retain Trunnion
9. C h e c k th e fr e e d o m o f r o ta tio n o f b o th sets o f
tru n n io n s o f the cro ss. I f to o tig h t, a g a in ra p the y o k e
e a r s as d e s c r ib e d a b o v e . T h is w ill lo o se n th e b e a r in g s
a n d h e lp s e a t th e b e a r in g re ta in e r s .
C ENTER S U P P O R T B E A R IN G —FIG. 4A -1 8
See C A U T IO N on page 1 o f this
C A U T IO N :
section regarding Center
fasteners.
1. R e m o v e d u st sh ie ld .
2. R e m o v e s tra p r e t a in in g r u b b e r c u s h io n
b e a r in g s u p p o rt.
3. P u ll s u p p o r t b r a c k e t fr o m r u b b e r c u s h io n an d
p u ll c u s h io n fr o m b e a r in g .
4. P u ll b e a r in g a s s e m b ly fr o m s h a ft.
Support Bearing
fr o m
5. Assemble bearing support as follows:
a. Install inner deflector on propeller shaft, if
removed, and prick punch deflector at two opposite
points to make sure it is tight on shaft.
b. Fill space between in ner dust shield and
bearing with lithium soap grease.
c. Start bearing and slinger assembly straight on
shaft journal. Support propeller shaft and, using suitable
length o f pipe over splined end o f shaft, press bearing
and inner slinger against shoulder on shaft.
d. Install dust shield over shaft, small diam eter
first and press into position against outer slinger.
e. Install rub ber cushion onto bearing.
f. Install bracket onto cushion.
g. Install retaining strap.
Installation of Propshafts
N O TE : W h e n re installing
necessary to place
positions to assure proper operation. This is called
phasing.
All models with 32 splines
shown in figure 4A-19, to obtain p rop er phasing.
The shafts can mate only in the correct position.
G and K models with 16 splines
shown in figure 4A-20.
1. For models with one piece propeller shafts, slide
shaft into transmission and attach rear U -jointto axle.
2. For C-P models with two-piece propeller shafts,
proper phasing is accomplished with the alignm ent key,
shown in figure 4A-19.
3. F or G -K models with two piece shafts, install
front h alf into transmission
crossmember.
a. Slide grease cap and gasket onto rear splines.
b. Rotate shaft so front U-joint trunnion is in
correct position. See figure 4A-20.
c. Take rear propeller shaft and before install­
ing, align U-joint trunnions as shown in figure 4A-20.
Attach rear U-joint to axle. Tighten grease cap.
d. Torque bearing support to crossmem ber and
U -joint to axle attachments.
C O N S T A N T VELOCITY UNIVERSAL J O IN T
(Snap Ring Type) RETENSIO N
Disassembly
1. Remove auxiliary front propeller shaft from
vehicle.
2. Remove rear trunnion snap rings from center
yoke. Remove grease fitting.
3. Place propeller shaft in vice as shown in figure
4A-21. Drive one rear trunnion bearing cap from center
yoke as shown in figure
approxim ately 3 /8 " .
NOTE: Keep rear portion o f propeller shaft up to
avoid interference o f rear yoke h alf with center
yoke.
prop sh afts, it
the shafts into particular
use an alignment key, as
must be phased as
and bolt support
4A-21 until it protudes
is
to