Service Manual

ProCore 864/1298 Page 4 − 43 Coring Head
3. Disassemble quill assembly:
A. Remove oil seal (item 21) from quill housing. Dis-
card oil seal.
B. Bend retaining tab of retaining shim and remove
lock nut and shim from shaft. Discard retaining shim.
C. Remove outer bearing. Slide shaft and inner
bearing from quill housing.
D. Remove inner bearing from shaft.
E. Use press to remove bearing cups from quill
housing.
4. Remove oil seal (item 1) from housing to allow re-
moval of cross shaft assembly. Discard oil seal.
5. Remove retaining ring that secures cross shaft as-
sembly in gearbox housing.
NOTE: Soft shims (item 4) between hard shim (item 3)
and outer bearing (item 5) are used to adjust cross shaft
end play. Take note of number and location of shims to
assist in assembly process.
6. Slide cross shaft assembly from gearbox housing.
Note location of hard shim (item 3) and soft shim(s) just
inside retaining ring location. Remove outer bearing cup
and both bearing cones from cross shaft.
NOTE: Soft shims (item 4) between inner bearing cup
and gearbox housing are used to adjust gear mesh and
pattern. Take note of number of shims to assist in as-
sembly process.
7. Remove inner bearing cup from gearbox housing.
Remove soft shim(s) from between inner bearing cup
location and gearbox housing. Note the number of soft
shim(s).
8. Remove and discard remaining oil seal (item 10)
from gearbox housing. Discard oil seal.
9. Thoroughly clean and inspect all gearbox compo-
nents. Replace all worn or damaged parts.
Assembly (Fig. 41)
NOTE: Soft shims (item 4) between inner bearing cup
and gearbox housing are used to adjust gear mesh and
pattern. During assembly, install same number of soft
shims as were removed.
1. Position soft shim(s) in housing and then press inner
bearing cup fully into housing bore.
2. Press inner and outer bearing cones onto cross
shaft. Make sure that bearings are pressed fully to
shoulders on shaft.
3. Install cross shaft assembly into gearbox housing:
A. Slide cross shaft assembly into gearbox housing.
NOTE: Soft shims (item 4) between hard shim and
outer bearing are used to adjust cross shaft end play.
During assembly, install same number of soft shims
as were removed.
B. Position outer bearing cup, soft shim(s) and hard
shim (item 3) onto cross shaft. Secure cross shaft
with retaining ring.
C. Check that cross shaft has from 0.001” to 0.003”
(0.03 to 0.07 mm) end play. If necessary, add or re-
move soft shim(s) between outer bearing and hard
shim to adjust end play.
4. Assemble quill assembly:
A. Install bearing cups into quill housing. Make sure
that cups are fully installed to shoulder in housing.
B. Install inner bearing cone fully onto shaft.
C. Slide shaft into housing.
D. Slide outer bearing cone onto shaft.
E. Install retaining shim and then lock nut onto shaft.
Make sure that tab on retaining shim is aligned with
slot in shaft.
F. Tighten lock nut until shaft has from 0.001” to
0.003” (0.03 to 0.07 mm) end play. Secure lock nut in
place by bending a locking tab on retaining shim into
one of the slots in the lock nut.
5. Lightly grease O−ring (item 16) and install into
groove of quill housing.
NOTE: Gaskets (item 15) are used to adjust gearbox
backlash. During assembly, install same number of gas-
ket(s) as were removed.
6. Position gasket(s) to quill housing and install hous-
ing assembly into gearbox housing. Make sure that gear
teeth mesh properly with gear on cross shaft. Secure
quill housing with six (6) flange head screws. Torque
screws 81 ft−lbs (109 N−m).
7. Check gearbox backlash (Fig. 42):
A. Clamp the output shaft of gearbox in a soft jawed
vise.
B. Lightly clamp a pair of locking pliers onto the
gearbox input shaft.
Coring Head