Operation Manual
9.0 Assembly
Assemble components to the shaft from which
they were removed.
9.1 Fitting shafts into the bearing housing
1. Locate the outer cups (33) into the bearing
housing (18). This operation is made
easier if the bearing housing is heated to
158
0
F. Press fit against the shoulders after
cooling.
2. Position the drive shaft (29) vertically in
the vice using soft jaws and apply antiseize
compound to the bearing diameters.
3.
Heat the front bearing inner cones to 230
0
F.
Do not use any form of live flame when
heating as this will damage bearings.
4. Assemble the front bearing inner cone
(33) onto the shaft (29) ensuring a positive
fit against the shaft shoulder.
5.
Locate the drive shaft assembly in the
bearing housing (18) in the bore marked
with an 'X' in the drainage slot.
6. Locate the second heated bearing on the
drive shaft and retain with the tab washer
(52) and bearing nut (38) (hand tight).
7. Repeat the operation for the auxiliary
shaft (28).
8.
Allow bearings to cool to handling
temperature.
Note:
Failure to do so will result in
incorrectly set bearings.
9. Secure the drive shaft (29) and tighten the
bearing lock nut (31), release the shaft,
lightly tap each end of the shaft with a soft
mallet and rotate.
Check the torque required to turn the
shaft in the bearings. The bearings
are correctly adjusted when the torque
to turn each shaft is 1.40 to 1.67 lbft for
new bearings.
If a torque wrench is not available tighten
until shaft is firm without spinning. Repeat
the above for the auxiliary shaft (28).
10. Lock the bearing retaining nuts (31) with
the tab washers (32). If no tab lines up with
any slot gradually tighten (never loosen)
until engagement is possible.
11. Apply oil to the bearings.
9.2 Fitting the front seal retainers
1. Lightly lubricate the outside diameter of
the oil seals (37) then press the oil seals
into the front seal retainers (36).
2.
Clean the rear face of the retainers and
the mating faces on the bearing housing
(18). Apply silic one sealant to the
retainers and press into place.
9.3 Fitting timing gears and setting rotor
timing
1.
Locate the timing shims (30) on each
shaft from which they were removed.
2.
Locate gear keys (46) into shafts (28,29).
3. Slide each timing gear (23,24) onto the
shafts, realign marks if gears were
previously marked in pairs.
4.
Locate tab of locking washer (52) in
keyway of each gear.
5. Fit the timing gear lock nuts (38) and with
a plastic block in the gears to stop them
turning tighten with a 'sharp tap' on a 'C'
spanner.
STP125 Page 20
