Mazda 1975 Rotary Pickup Workshop Manual page 142

9
I
9-E-2.
Adiusting Pinion Bearing Preload
1. Position the pinion assembly in the
install the collapsible spacer as strown in
9-E-3.
Assembling Differential
l. Install the thrust washer on each differential side
gear and install these in the gear case.
carrier and
F i g . 9 - 1 5 .
Fig. 9-17 Installing side
2. Through the openings of
of two pinion gears exactly
other.
gear and thrust washer _
the gear case, insert each
180 degrees opposite each
Fig. 9-15 Installing pinion and collapsible spacer
2. Place the front pinion bearing in position on the
pinion. Hold the pinion fully forward and drive the
pinion bearing over the pinion until seated.
3. Apply gear lubricant to the lip of the pinion oil
seal and install the pinion oil seal into the carrier.
4. Install the companion flange on the pinion by
tapping with a soft hammer.
5. Install the pinion washer and nut. Before tightening
the nut (When the pinion preload is Zero), check the
drag by the oil seal by using a torque wrench.
6. Tighten the pinion nut to 20 m-kg (145 ftJb) and
check the preload as strown in Fig. 9-16.
Fig. 9-15
Checking pinion bearing preload
Note: After preload has been checked, final tightening
should be done very cautiously.
The pinion nut should be further tightened only a
little at a time and preload should be checked after
each slight amount of tightening. Exceeding preload
specifications will compress the collapsible spacer too
far and requires its replacement. The maximum
tightening torque of the nut is 35 m-kg (253 ft-lb).
7. While observing the proceeding caution, carefully
set the preload drag at 13 to l8cm'kg (11.3 to 15.6
in-lb) plus the oil seal drag determined in Step 5.
Note: If the preload is measured by using a spring
scale at the bolt hole of the companion flange, the
reading should be 3.3 - 4.6k9 (7.3 -
10.1 lb).
3. Rotate the gears 90 degrees so that the pinion
shaft holes of the case come into alignment with the
holes in the pinion gears.
4. lnsert the pinion shaft througfr the case and pinion
gears.
5. Check the backlash of the side gear and pinion
geat.
The backlash should be 0 to 0.2 mm (0 to 0.008 in).
Fig. 9-18
Installing differential gears
bearing
Fig. 9-19
Checking backlash of pinion and side gear