Interlock control valve – Spicer Tandem Drive Axles Service Manual D__R440, 460, 480, D_R461, 462, 463, 521, 581, 601, 651, 652, 653 User Manual
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Inter-Axle Differential Lockout
Inter-Axle Differential Lockout
With Interlock Control Valve (straight-air type)
Lockout Cylinder
Disassemble cylinder by performing the following steps:
1.
Remove capscrews, Iock washers, cover assembly
and o-ring.
2.
Remove hex-nut piston and o-rings.
3.
Remove body capscrews and lock washers, then re-
move body and piston as an assembly.
Assemble cylinder by performing the following steps:
1.
Apply gasket compound to mounting surface on
power divider cover.
2.
Install lockout body. Secure with capscrews and lock
washers. Torque capscrews to 48-56 lbs. ft. (65-76
N•m).
Note: Before installation, soak piston felt oilers in SAE 30 en-
gine oil and lubricate o-rings with a high-viscosity sili-
cone oil or barium grease o-ring lubricant.
3.
Install felt oilers and o-ring on piston.
4.
Install compression spring over shift fork push rod.
Install piston in body. Install o-ring over push rod and
in piston. Install hex-nut piston and tighten to 20-26
lbs. ft. (27-35 N•m). Install o-ring on piston.
5.
Install o-ring in lockout body cover. Install cover as-
sembly and secure with capscrews and lock washers.
Torque capscrews to 6-108 lbs. in. (10-12 N•m).
6.
Adjust interlock control valve.
Interlock Control Valve
Repair and Replacement
Replace faulty valve as an assembly.
Remove Valve
1.
Loosen lock nut and unscrew valve body from cylin-
der cover.
Install and Adjust Valve
Note: If button is not assembled to valve stem, install as fol-
lows:
•
Insert valve stem to full depth of the button. Lock
in place with set screw. Torque set screw to 6.
lbs. in. (0.7 N•m).
1.
With button assembled to valve, install lock nut and
lock washer on valve body. With lockout cylinder ex-
hausted, screw the valve assembly into the lockout
cylinder cover until the valve is seated on hex-nut pis-
ton.
2.
To adjust, unscrew control valve until the valve air-
delivery port is aligned with the lockout cylinder air-
inlet port.
Note: Do not unscrew valve more than 360°.
Lock the valve in place with lock nut. (3.9 N•m)