Published 4-20-2015, Control # 502-01 2-41
RT540E SERVICE MANUAL HYDRAULIC SYSTEM
CROSS AXLE DIFFERENTIAL LOCK VALVE
Description
The optional cross axle differential lock valve is mounted on
the right side of the aft center frame cross member. The
valve consists of a three way, two position valve without a
reducing valve (Figure 2-21). The valve is used to control the
application of the crane’s hydraulically applied and released
cross axle differential lock actuators.
Pressing the top of the cross axle differential lock switch on
the front console 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.
Releasing the cross axle differential lock switch unlocks the
three-way, two-position solenoid valve to apply hydraulic
pressure to the spring release 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, lockwashers and
nuts securing the valve to the frame. Remove the valve.
Installation
1. Secure the valve to the frame with the capscrews
flatwashers, lockwashers and nuts. Torque the
capscrews, see Fasteners and Torque Values, page 1-
11.
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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