8 - 3
T
ROUBLE
-
SHOOTING
C
HAPTER
8
THP 94/42 R 4 XXT
THP 125/42 R 4 XXT
THP 140 H/42 R 4 XXT
GB-07.2005
Fault
Cause
Remedy
Pressure relief valve defective.
Check valve and solenoid, and
have part replaced if necessary
by
WAITZINGER
customer service.
Controls defective.
Check fuses F9 to F12.
and replace if necessary.
Set back-up function to
position “A”.
Immediately on finishing work
have the fault rectified by
WAITZINGER
customer service.
Pumping or sucking does not
Blockage in the conveying
Suck back and establish the cause
at maximum pressure. pipework.
of the blockage, see section
7.6.1.1.
Defective sensor on drive cylinder.
Set back-up function to
position “B”.
Replace the defective sensor at
the earliest opportunity.
Spool valve defective.
Check valve and solenoid, and
have fault rectified if necessary by
WAITZINGER
customer service.
Concrete delivery from the pump
Incorrect gear or stage
Engage the correct gear.
is too little or is irregular.
engaged in the vehicle gearbox.
Vehicle engine speed too low.
Increase the speed. Check the
settings.
Concrete pump sucking in air.
Inform the mixer truck driver that
the hopper must always be filled
to the agitator shaft at least, see
section 7.6.2.
Check the conveying piston
for wear.
Concrete mixture unsuitable
Use only “pumping concrete”,
for pumping.
see section 7.6.3.