Upright AB38, Service & Parts Manual

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Troubleshooting Section
5-3 AB38 Work Platform
4. Tacho faulty. Repair or replace.
Machine 1. The AB38 is not Lower the Elevating
will not in the stowed Assembly.
drive in position.
high speed. 2. Faulty boom rest Test and replace switch if
switch. necessary.
3. Loss of Check continuity and repair
continuity along if necessary .
boom rest switch
cable.
4. Machine is not Drive to level ground.
level.
5. Tilt Sensor is Adjust Tilt Sensor or
faulty. replace.
Machine 1. Machine is not Lower the Platform and
will not level. drive to level ground.
drive while 2. Tilt Sensor is Adjust Tilt Sensor or
elevated. faulty. replace.
PROBLEM PROBABLE CAUSE REMEDY PROBLEM PROBABLE CAUSE REMEDY
prime the brake drive is selected. If no
lines. current is being fed to this
coil then replace the cable
feeding the coil or replace
the P.C.B.
5. Drive Reduction Replace gearbox and
Gearbox has ensure proper oil level is
seized due to maintained.
lack of oil.
6. Brake Valves out Adjust Brake Pressure
of adjustment. Reduction Valve to 100 Bar.
7. Joystick Check for voltage signal on
damaged or pin 8 or 11 on the traction
faulty. motor control unit when
forward or reverse is
selected using the joystick.
Cage 1. Air in cage Reprime or bleed as
levelling is levelling closed required. See Section 4.19.
erratic or circuit.
irregular 2. Cage damaged, Replace.
throughout hole centres are
the lift cycle. out of position.
3. Damaged Remove and inspect
Overcentre O-Rings and seals.
valves on master Replace if necessary.
/slave cylinders.
Machine 1. Faulty Steering Replace if necessary.
will not Switch on
steer. Joystick.
2. Loose Reconnect if necessary.
connection on
steer solenoid
valve V5.
3. Faulty steering Test steering valve coil. If
valve coil. proper voltage is present
(Fault code : and coil is not magnetised
59 or 61) -Replace.
4. Steering valve Replace valve.
V5 stuck.
5. Mechanical Replace damaged parts.
Damage.
Machine 1. Faulty drive Test and replace if
drives in switch. necessary.
reverse but 2. Loose Check continuity and cable
not forward. connection or connections. Repair or
continuity lost to replace as necessary.
reverse
contactor coil.
3. Reverse Check that coil is receiving
contactor coil 48v. If it is and contacts are
faulty. not closing then replace
the contactor.
4. Tacho faulty. Repair or replace.
Machine 1. Faulty drive Test and replace if
drives switch. necessary.
forward but 2. Loose Check continuity and cable
not in connection or connections. Repair or
reverse. continuity lost to replace as necessary.
forward
contactor coil.
3. Forward Check that coil is receiving
contactor coil 48V. If it is and contacts are
faulty. not closing then replace
the contactor.
5.1