18
Fault
Cause
Remedy
No pressure builds up in
the device
The pump is not screwed
on tightly.
Screw the pump on tightly.
O-ring [13] on the pump is
faulty.
(Fig. 16)
Replace the O-ring.
Diaphragm [14] is defecti-
ve.
(Fig. 16)
Replace the diaphragm.
Liquid flows out of the
pump
Valve disc [18] dirty of
defective.
(Fig. 21)
Clean or replace the valve disc.
No tank pressure indica-
tion on the piston pressure
gauge,
Safety valves blow off too
early.
Piston pressure gauge [10]
is defective
For safety reasons, it is not pos-
sible to replace the safety valve/
piston pressure gauge.
Please contact your local MES-
TO specialist or MESTO directly.
(3237P)
.
Replace the piston pressure
gauge
(3278P)
.
The nozzle does not spray
even though pressure is
present
Nozzle [16]
(Fig. 18) or
/ and filter [17] (Fig. 19)
clogged.
Clean the nozzle or / and filter.
Discharge filter [6]
(Fig.
20)
blocked.
Clean discharge filter.
The shut-off valve does not
close.
Liquid emerges without the
lever being activated
O-rings [19] of the pressu-
re bolt [20] is not greased /
lubricated.
(Fig. 22)
Defective pressure bolt
[20] or
O-ring [19].
(Fig. 22)
Grease the O-rings of the pres-
sure bolt
Replace the pressure bolt or
O-rings.
Faults
EN ENGLISH
Observe the legal requirements of your country for accident prevention and check
the device in regular intervals.
Unless otherwise specified, we recommend that an expert carries out an external
test every 2 years and an internal test every 5 years as well as a strength test every
10 years.
Use only original spare and accessory parts.
Contact address for additional information → see title page.
