Spicer Tandem Drive Axles Service Manual S400 - Manual (Page 25)

23
DIFFERENTIAL INSTALLATION
1. Install ring gear and differential assembly into carrier
housing. Tilt differential slightly so ring gear clears
pinion pilot bearing support.
NOTE: Care should be used when installing ring gear
and differential into carrier housing so damage to ring
gear, pinion, bearings, or bearing bores does not
occur.
2. Differential bearings should be lubricated and
bearing cups should be cleaned and #620 loctite
applied to the O.D. of the bearings.
3. Be sure side bearing cups are seated on bearing
cones. Assemble differential bearing caps with
match marks in proper location. Clean bearing cap
bolts and washers and coat threads with Loctite
#277(red).
4. Install bearing cap bolts and tighten enough to
eliminate visible space between differential bearing
cap and carrier.
Do not torque bolts at this time.
NOTE: Differential assembly must be aligned within
bearing bores before preload is applied or damage to
bearings can occur.
5. Install adjusting rings. Tighten both adjusting rings
until end play is eliminated, and there is backlash
between the ring gear and pinion.
See Figure 23.
6. Loosen adjusting ring on tooth side of ring gear 1
notch and tighten adjusting ring on flange side of
ring gear 1 notch. Repeat process until backlash is
elminated. Tighten adjusting ring on tooth side of
ring gear until the ring gear and pinion backlash
matches the backlash etched on the ring gear. This
adjustment sets both the backlash and the bearing
preload.
7. Check ring gear and pinion backlash in four equally
spaced positions aound the ring gear with a dial
indicator as shown.
Acceptable backlash tolerance is +/- .002" from
backlash etched on ring gear. (See Figure 24.)
FFFFFigur igur igur igur igure 2 e 2 e 2 e 2 e 23 3 3 3 3
FFFFFigur igur igur igur igure 2 e 2 e 2 e 2 e 24 4 4 4 4
NOTE: If the backlash tolerance varies more than
.003" (.080mm) between the four positions, remove
the differential and determine the cause.
8. Once the backlash is set, torque the differential
bearing cap bolts to 295-340 Lb-Ft (400-461 N-
m). Check backlash after torquing cap bolts.
Differential Installation Complete