2-52 Published 08-25-09, Control # 077-04
HYDRAULIC SYSTEM RT9130E SERVICE MANUAL
CROSS AXLE DIFFERENTIAL LOCK VALVE
Description
The cross axle differential lock valve is located on the right
side of the rear frame. The valve is a three-way, two position
solenoid valve. The valve is used to control the application of
the crane’s hydraulically applied and released cross axle
differential lock actuators.
Positioning the AXLE DIFF switch to LOCK shifts the three-
way, two-position solenoid valve so hydraulic oil can flow to
the engage port of the cross axle differential lock actuators,
extending them. When the actuators extend, they engage
the splines on the differential case and the axle shafts to lock
the differential assemblies together.
Positioning the AXLE DIFF switch to UNLOCK shifts the
three-way, two-position solenoid valve so hydraulic oil can
flow to the disengage port of the actuators, retracting them.
As the actuators retract, they unlock the axles.
Maintenance
Removal
1. Tag and disconnect the electrical connector from the
valve.
2. Tag and disconnect the hydraulic lines attached to the
valve. Cap or plug lines and ports.
3. Remove the capscrews, flatwashers and nuts securing
the valve to the frame. Remove the valve.
Installation
1. Secure the valve to the frame with the capscrews,
flatwashers and nuts.
2. Connect the hydraulic lines to the valve as tagged during
removal.
3. Connect the electrical connector to the valve as tagged
during removal.
4. Apply and release the cross axle differential lock several
times. Verify the cross axle differential lock holds the
axle from moving when applied so there is no differential
action between the wheels.
5. Check for leaks. Make repairs as needed.
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