INSTRUCTION, USE AND
MAINTENANCE MANUAL
Page 27 of 36
GB
14.0 TROUBLESHOOTING TABLE
Possible troubles which might occur to the tyre-changer are listed below. The manufacturer disclaims all
responsibility for damages to people, animals or objects due to improper operation by non-unauthorised
personnel. In case of trouble, call Technical Service Department for instructions on how to service and/or
adjust the machine in full safety to avoid any risk of damage to people, animals or objects.
In an emergency and before maintenance on tyre-changer, set the main switch to “0” and lock it in this position.
CONTACT AUTHORIZED TECHNICAL SERVICE
do not try and service alone
Problem
Possible cause
Remedy
The mandrel does not work if
pedal is pressed.
1. No voltage available.
2. Motor faulty.
3. Safety fuses for machine sys-
tem blown.
1. Check that the plug is properly
connected and power supply
is working.
2. Check for correspondence of
electric data of the machine
with the mains.
3. Check for proper working
conditions. Check connec-
tions and parts (motors and
switches).
The self-centring device stops
during tire assembly/disassem-
bly.
Transmission belt slow or worn
out.
Check for proper working condi-
tions of the transmission belt.
Tension up and/or replace, if
necessary.
The mandrel does not clamp the
rim properly.
1. Clamps worn out.
2. One or more pneumatic cylin-
ders faulty.
1. Replace clamps.
2. Replace pneumatic cylinder
gaskets.
The head gets in contact with the
rim during assembly/disassem-
bly.
1. Clamping plate not adjusted or
faulty.
2. Mandrel retaining screw loose.
1. Adjust or replace the clamping
plate.
2. Tighten the screw.
One or more pedals do not re-
turn to their original position.
1. Return spring released.
2. Return spring broken.
1. Fasten the spring.
2. Replace the spring.
Pneumatic controls do not work
(mandrel, bead breaker, post tilt-
ing and tool clamping).
1. Machine pneumatic system not
connected.
2. Air lines clogged.
1. Check pneumatic connections
and supply.
2. Ensure that the air filter is
clean and undamaged, if fit-
ted. If no air filter is fitted,
remove all dirt into the pneu-
matic system and then fit a
suitable filter.
Clean and/or replace the si-
lencers.
Some single pneumatic devices
do not work (beader, clamps or
post tilting device).
Ensure that device and/or distrib-
utor seals are not damaged.
Call for technical assis-
tance.
7300-M023-0_B
HP441S.XX - HP441S.XXFI
HP441SQ.XX - HP441SQ.XXFI
