Troubleshooting Flow Charts
PROBLEM: Length reading incorrect. Crane is not in “out of load chart” condition.
Length Reading Problem
START
Check mechanical adjustment of length potentiometer in cable reel. When main boom is fully retracted,
adjust length potentiometer counter-clockwise until it stops.
Refer to length/angle adjustments procedure.
Correct?
Replace length potentiometer assembly. Remove slip ring body from shaft and
remove gear wheel from potentiometer axle. Unscrew mounting plate and
remove potentiometer assembly from mounting plate. Remove assembly wires
No form terminal block. Connect new assembly to terminal block. Reinstall
mounting plate, gear wheel and slip rings. With boom fully retracted, reset
potentiometer by turning counter-clockwise until it stops.
Refer to Cable Reel Parts List.
Yes
Check out clutch in big gear wheel of length transducer. Extend and retract
boom to ensure that clutch is not sipping on potentiometer axle.
Correct?
No
Yes
Replace the gear wheel, clean potentiometer
axle. Reset length potentiometer.
Refer to length/angle adjustments procedure.
Check power supply to length transducer on connection board,
terminal X1:8 (ground) and X1:11 (-5V)
Refer to system wiring diagram.
Correct? No
Yes
Replace connection board and reset pressure
channel. Refer to system wiring diagram and main
board replacement procedure.
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