GMC 1976 ZEO 6083 Maintenance Manual page 486

7- 38 TRANSMISSION
Figure 35-Removing Sprocket Bearing
b. Mount sprocket, with turbine or input
shaft placed down between two 2" x 4" x 10" wood
blocks .
NOTE :
Wood blocks are positioned on sides or
ends, depending on which bearing is to be re-
placed .
c. With a hammer and brass rod, drive the
inner race, alternately through each of the access
openings, until the bearing assembly is removed from
the sprocket hub, Figure 35 .
INSPECT DRIVE SPROCKET,
TURBINE SHAFT, AND LINK
ASSEMBLY
1 . Inspect drive sprocket teeth for nicks, burrs,
scoring, galling, and excessive wear .
NOTE :
Wear pattern at bottom of tooth form is
normal .
2. Inspect drive sprocket to ball bearing retaining
snap ring for damage.
3. Inspect drive sprocket ball bearing inner race
mounting surface for damage .
4. Inspect turbine shaft for open lubrication pas-
sages. Run a tag wire through the passages to be sure
they are open . See lubrication chart for passage loca-
tion, Figure 4.
5 . Inspect spline for damage .
6. Inspect the ground bushing journals for dam-
age.
7 . Inspect the oil seal groove for damage or exces-
sive wear .
8 . Inspect turbine shaft oil seal ring for damage .
Do not remove unless replacement of ring is re-
quired . The service ring is hook type cast iron .
9. Inspect the turbine shaft for cracks or distor-
tion .
10 . Inspect the link assembly for damage or loose
links.
NOTE :
Check the guide links. Guide links are
the wide outside links on each side of the link
assembly .
INSPECT DRIVEN SPROCKET AND
INPUT SHAFT
1 . Inspect driven sprocket teeth for nicks, burrs,
scoring, galling, and excessive wear .
NOTE :
Wear pattern at bottom of tooth form is
normal .
2. Inspect sprocket to ball bearing retaining snap
ring for damage .
3 . Inspect ball bearing inner race mounting sur-
face for damage .
4. Inspect input shaft for open lubrication holes.
Run a tag wire through the holes to be sure they are
open . See Figure 4 for location of holes.
5. Inspect spline for damage .
6. Inspect ground bushing journal for damage.
INSTALL SPROCKET BEARINGS
1 . Turn sprocket so that turbine or input shaft is
pointing upward .
2. Install new sprocket bearing as follows:
a. Install support snap ring, letter side down
onto shaft.
b . Assemble bearing assembly on turbine or
input shaft.
c. Using a piece of pipe, drive the bearing
assembly onto the hub of the sprocket until it is
resting on the bearing seat of the sprocket .