Spicer Tandem Drive Axles Service Manual D__R440, 460, 480, D_R461, 462, 463, 521, 581, 601, 651, 652, 653 - Manual (Page 93)

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Wheel Differential Lock
Wheel Differential Lock
Assemble Unit
Note: Prior to assembly, the piston felt oilers should be soaked
in SAE 10 oil for one hour. Lubricate o-rings with a high-
viscosity silicone oil or barium grease o-ring lubricant.
1. Assemble pin to actuating lever and install this as-
sembly in shift lever unit housing.
2. Assemble o-ring and piston to push rod and fasten
with flat washer and lock nut. Tighten nut to a torque
of 120-150 lbs. in. (14-17 N•m). Install felt oilers and
o-ring in piston.
During the following procedure using a press, make certain
components are properly aligned in press to prevent possi-
ble personal injury or damage to parts.
3. Insert piston stop and compression spring in shift
unit housing. Place piston and push rod assembly in
housing. Position housing assembly in arbor press.
4. Apply pressure to piston until actuating lever is in
alignment with push rod end. Install clevis pin. Re-
lease press.
5. Place cover gasket in position on shift unit housing
then install cover and bearing assembly and fasten
with capscrew and lock washers. If necessary, use a
sealer on threads of capscrews to prevent any leak-
ing. Tighten screws to a torque of 90-110 lbs. in. (10-
12 N•m).
6. Place o-ring in groove of shift unit housing, then in-
stall housing cover and secure with bolts and lock
nuts. Tighten lock nuts evenly to a torque of 108-132
lbs. in. (12-15 N•m).
7. Fill shift unit with SAE 10 oil or automatic transmis-
sion fluid (see Lubrication) when axle is installed in
vehicle.
1 - Press
2 - Piston
3 - Piston lock nut
4 - Compression spring
5 - Actuating lever assembly
CAUTION
1
2
3
4
5
1 - Actuating lever assembly
2 - Press
3 - Shift unit housing
4 - Push rod
5 - Clevis pin
2
1
5
4
3