8 - 4
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
Incorrect settings in the
Have the settings checked by
controls.
WAITZINGER
customer service.
S-valve stiff.
Check S-valve settings, check
wear plate and ring for heavy
wear or fracture, and check the
S-valve bearings.
Concrete pump short strokes.
Back-up function B switched on.
Switch offrotary switch
(Item 2, Fig. 5.7). Switch on the
pressure switch, see section 7.5.4.
Piston rings in drive cylinder
Have piston rings replaced by
worn.
WAITZINGER
customer service.
Outrigger does not extend.
Incorrect switch setting.
Set selector switch (Item 14, Fig.
5.2) to position “Desk” or set
remote control (Item 8, Fig. 5.12)
to position “Outriggers”.
Safety switch on the outrigger
Set safety switch (Item 3, Fig. 5.5)
has not been pressed.
or Item 1, Fig. 5.6).
Engine not running.
Start the engine.
Vehicle gearbox in neutral.
Select a gear, see section 7.2.1.
Pre-selector valve not actuated.
Check solenoid and wiring.
Actuate the pre-selector valve
“Outrigger” manually. Seek advice
from
WAITZINGER
customer
service on this point.
Pressure setting too low at the
Check pressure setting shown on
outrigger valve.
the data sheet, adjust it if
necessary.
Clean the pressure relief valve.
Seek advice from
WAITZINGER
customer service on this point.
Outrigger catch does not open.
Lubricate the outrigger catch, if
necessary disassemble it and
clean it, replace the seals and d
burr the edges. Seek advice
from
WAITZINGER
customer
service on this point.