Spicer Tandem Drive Axles Service Manual D__R440, 460, 480, D_R461, 462, 463, 521, 581, 601, 651, 652, 653 - Manual (Page 129)

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Air Shift System Components
Air Shift System
Com
p
onents
Axle Range Shifter Valve Interlock Pin
Assembly
Note: Before reassembly, lubricate o-rings with a high-viscos-
ity silicone oil or barium grease o-ring lubricant.
Assembly Pin. Install o-rings on piston and piston stop. Insert
spring, piston and piston stop in housing and secure with snap
ring.
Note: Interlock pin and piston must reciprocate freely in the
piston housing when compressed against the compres-
sion return spring.
Note: For ease of assembly, insert a pin or drill bit (5/64" max.
diameter) into the piston stop to guide the piston stop as
it is installed into the piston housing.
Note: The interlock pin assembly may be disassembled for
cleaning and inspection. However, parts are only avail-
able as a complete assembly (shifter valve and interlock
assembly).
Disassemble Pin. Remove snap ring, then remove piston
stop, piston and spring from piston housing.
1 - Mounting screw
2 - Interlock pin and piston
3 - Piston stop
4 - Snap ring
5 - O-rings 6 - Compression spring
7 - Piston housing
8 - Air shifter valve assembly