Spicer Drive Axles Service Manual Axle Shift Systems, 2-Speed Single Rear Axles - Manual (Page 27)

24
Air Shift System
Assembly
/ Installation
Shift Unit Assembly/Installation
Assemble Shift Unit
Note: Prior to assembly, the piston felt oilers should be
soaked in SAE 10 oil for one hour. Lubricate “0” rings
with a high viscosity silicone oil or barium grease “0”
ring lubricant.
1. Assemble pin to actuating lever and install this
assembly in shift unit housing.
2. Assemble “0” ring and piston to push rod and fasten
with flat washer and locknut. Torque locknut. Install
felt oilers and “0” ring on piston.
CAUTION: During the following procedure using a press,
make certain components are properly aligned in press to
prevent possible 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.
Release press.
5. Place cover gasket in position on shift unit housing
then install cover and bearing assembly and fasten
with cap screw and lock washers. If necessary, use a
sealer on threads of cap screws to prevent any leak-
ing. Torque cap screws.
6. Place “0” ring in groove of shift unit housing, then
install housing cover and secure with bolts and lock-
nuts. Torque locknuts.
7. Fill Shift unit with SAE 10 oil or automatic transmis-
sion fluid (see Lubrication page 23) when axle is
installed in vehicle.
Actuating
Lever
Pin
Press
Piston
Locknut
PISTON AND
PUSH ROD
ASSEMBLY
INSTALLATION
CAUTION
Actuating
Lever
Press
Shift
Unit
Housing
Push
Rod End
Clevis
Pin
PUSH ROD CLEVIS
PIN INSTALLATION