GB
IRL
Faults
Use only MESTO spare parts and accessories (→ Fig. on page 2).
Fault
No pressure builds up in
the device
Liquid flows out of the
pump
No tank pressure
indication on the piston
pressure gauge,
Safety valves blow off too
early.
The nozzle does not
spray even though
pressure is present
The shut-off valve does
not close.
Liquid emerges without
the lever being activated.
Contact address for additional information → see title page.
Warranty
We guarantee that from the time it is first purchased for a period of the legally valid required
warranty period (maximum 3 years) this device will not exhibit any material or processing
errors. If defects are discovered during the warranty period, MESTO or the distributor in
your country will repair the device without charging for the labor or material or (at the
discretion of MESTO) replace the device itself or its defective parts. If such defects are
discovered, please contact us immediately. We require the invoice or cash register receipt
for purchase of the device. The warranty does not include wearing parts (seals, O-rings,
diaphragm, etc.) or defects, which have occurred due to improper use or unforeseeable
circumstances.
CE Declaration of Conformity
Spraying devices PRIMER 3237P und 3278P satisfy the requirements of the Pressure
Equipment Directive 97/23/EC and carry the CE mark.
Spraying devices PRIMER 3278P bear the CE marking.
AUS
USA
Cause
The pump is not screwed on
tightly.
O-ring [13] on the pump is
faulty. (Fig. 16)
Diaphragm [14] is defective.
(Fig. 16)
Valve disc [18] dirty of
defective. (Fig. 21)
Piston pressure gauge [10] is
defective
Nozzle [16] (Fig. 18) or / and
filter [17] (Fig. 19) clogged.
Discharge filter [6] (Fig. 20)
blocked.
O-ring [19] of the pressure bolt
[20] is not greased / lubricated.
(Fig. 22)
Defective pressure bolt [20] or
O-ring [19]. (Fig. 22)
17
NZ
CDN
Remedy
Screw the pump on tightly.
Replace the O-ring.
Replace the diaphragm.
Clean or replace the valve disc.
Have the piston pressure
gauge repaired (3237P).
Replace the piston pressure
gauge (3238P).
Clean the nozzle or / and filter.
Clean discharge filter.
Grease the O-ring of the
pressure bolt (dismantle or
assemble the pump → section
"Care and maintenance")
Replace the pressure bolt or O-
ring.
IND