Haulotte HA20 RTJ, HA20 RTJ O, HA20 RTJ PRO (HA61 RTJ)
Haulotte error code F04.34 — Front Axle Unlocking
Message on the display: Front Axle Unlocking
Code F04.34 occurs in machines: Haulotte HA20RTJ, HA20RTJ O, HA20RTJ PRO, HA61RTJ O, HA61RTJ PRO.
blocking fault
[case 1] Digital output's failure : Oscillating axle unlocking with oscillating axle option. [case 2] Detection of incoherence between the state of control for oscillating axle and pressure in the oscillating axle control valve when drive control is above the third of maximum control. [case 4] Detection of incoherence between the state of control for oscillating axle and pressure in the oscillating axle control valve : Control is OFF and detection of pressure.
Description from the Haulotte service manual, in the original wording.
Effect on the machine: --> YV101=FAIL& VAR[OscillatingAxleEnable] --> YV101=ON & D2000ms((WUI-SP109)<1500mV) & VAR[OscillatingAxleEnable] --> YV101=OFF & D2000ms((WUI-SP109)>1100mV) & VAR[OscillatingAxleEnable]
Possible causes
- Check YV101 : Check connection to ground, check connection to U106 ECU digital output, check connection to electrical collector, check connection between electrical collector and electroalve.
- Check YV101 : Check connection to ground, check connection to U100 ECU digital output, check connection to electrical collector, check connection between electrical collector and electrovalve.
- Check SP109 : Check connection to ground, check connection to U100 ECU digital input, check connection to electrical collector, check connection between electrical collector and electrovalve.
- Check also minimum speed for both directions (when reaching the third of the joystick’s stroke on front direction, drive must be effective “wheels are turning to front direction” / when reaching the third of the joystick’s stroke on reverse direction, drive must be effective “wheels are turning to reverse direction”).
- Check YV101 : Check connection to ground, check connection to U100 ECU digital output, check connection to electrical collector, check connection between electrical collector and electroalve.
- Check SP109 : Check connection to ground, check connection to U100 ECU digital input, check connection to electrical collector, check connection between electrical collector and electro valve.
What you can do
Switch the machine off with the emergency stop and switch it on again. If the code comes back, do not use the machine and call service.
What service does
A qualified service technician reads the code with the manufacturer's diagnostic tools, finds the cause, clears the code and carries out a function test.
Source: Haulotte Maintenance Book HA20 RTJ (4001055090), fault codes chapter.
The descriptions are quoted from the manufacturer's service documentation and are for guidance only. Clearing codes, calibrations and repairs are carried out by a qualified service technician according to the manual for the specific serial number. A machine with an active blocking code must not be used until the cause has been removed.
Does code F04.34 not go away?
RK Rental services Haulotte lifts at our workshop or on site at the customer's premises (construction site, factory, warehouse). We read the code, remove the cause and select the parts by serial number.
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