Spicer Drive Axle Wheel Differential Lock - Manual (Page 7)

5
Overview
Control Systems for Wheel Differential Lock
Two systems may be used to control the wheel differential lock operation.
Direct Interlock System
The driver manually locks and unlocks the wheel differential using a cab-
mounted control valve or switch. When the control switch is placed in the lock
position, the air supply solenoid valve opens and air pressure activates the
shift unit. When the control switch is placed in the unlock position, air pres-
sure supply is shut off and air pressure is released from the shift unit.
Note: Vehicles with this system should not be operated with the wheel differ-
ential engaged above 25 MPH.
In-Cab Switch
or Valve
Vehicle System Pressure -
80 - 120 PSI