Troubleshooting
Section
5-5
A38E Work Platform
5.1
Platform assembly will not
slew
1. Faulty controller
Check the I/O's Using EZcal diagnostics
2. Faulty slew solenoid
Check voltage at the solenoid electrical connections.
Use a screw driver or similar component to check the magnetic effect
of solenoid.
3. Incorrect cross-line relief
setting
Insert a pressure gauge in the TP port of the valve block.
Operate a slew function and measure the pressure.
Provided the main relief pressure has been preset properly, the gauge
should register 20-50 bar.
Reset or replace CLRV valves thus preventing bypassing of oil.
4. Faulty slew select switch
Replace the complete switch assembly.
Platform assembly will not
descend
1. Faulty controller
Check the programmed mast speed settings.
Check the continuity of mast speed enabling cables to the
controller.
Repair as necessary.
2. Faulty mast or jib solenoids
Check the voltage to the solenoids V7 & V8 for the mast functions.
Swap solenoids to confirm fault and replace if necessary.
P
ROBLEM
C
AUSE
A
CTION
Check the I/O’s using EZcal diagnostics.
Machine will not steer
1. Malfunction of joystick toggle Check I/O’s using EZcal diagnostics.
switch
Remove and service the switch &/or joystick.
2. Faulty steering solenoid &
valve
Check that the solenoids at V5 are energised while the steering
Check the cables feeding these solenoids. Replace the solenoids if
necessary. Check the valve cartridges for contamination.
3. Faulty controller
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steer speed enabling cable to the controller. Repair or replace as
necessary.
4. Steer cylinder malfunction
Check the hose connections to the cylinder.
Check the cylinder rod-end pins and the cylinder mounting bolts.
5. Seized wheel mounting frame
pivot(s)
Refer to the maintenance section for assembly and repair of the pivot
and associated parts.
6. Damaged steering link plates Replace the steering link plates, associated pins and lock plates.
Machine will not drive
1. Temp
Reset system and allow the system to cool down.
2. Towing valve open
Locate the towing valve
CT 21
on the valve block. Ensure that it is fully
closed by turning clockwise.
3. Incorrect hose connections
Refer to the hydraulic diagram for correct connections of valve ports
to the motor ports. Incorrect connection may result
in locking of
wheels.
4. Fail-safe brake-circuit
malfunction
Blocked brake line to either motor. Clear blockage and/or replace
hoses and fittings.
Check the correct function of the check valves V1 and V2 on
the valve block. These valve should open to allow brake chamber
evacuation.
Summary of Contents for A38E
Page 1: ...A38E PARTS MANUAL S N 00715 AND AFTER ...
Page 3: ...SCHEMATICS 7 1 Appendix A Pages Index A Appendix B Parts Index B ...
Page 4: ...PARTS AND SERVICE AUG 2018 Serial Number 01 00715 Part number 514252 201 ...
Page 14: ...Page 6 A38E Work Platform Section 1 3 Introduction Specifications NOTES ...
Page 91: ...Maintenance 4 A38E ...
Page 98: ...A38E Maintenance 11 Major Repairs Date Part Number Part Description Repair Performed ...
Page 102: ...A38E Maintenance 15 ...
Page 106: ...Section 4 2 4 1 Notes ...
Page 140: ...Troubleshooting Section 5 6 A38E Work Platform 5 2 NOTES ...
