Storch Airless Duomax 9000 Mode D'emploi page 154

Problem
Pump delivers only on the up-stroke
or travels downwards quickly and
upwards slowly.
Pump delivers only on the up-stroke,
travels upwards quickly and down-
wards slowly.
Pump travels upwards quickly and
delivers no material when travelling
downwards.
If the gun is off and the piston travels
upwards and downward too slowly:
Original instruction
Probable cause
The lower inlet valve does not seal
on account of contamination and/or
wear.
The material is too highly viscous for
the suction system. Leaky suction
system.
The upper outlet valve does not seal
on account of contamination and/or
wear. The lower packings are worn.
Material container is empty or ma-
terial is too highly viscous to flow
through the suction pipe. The inlet
valve is stuck in the valve seat.
Leaky screw connections.
The circulation valve does not close or
is worn.
The upper or lower ball is not sitting
correctly.
The lower packing is worn.
154
Remedy
Clean these components and check
them for damage. Place inlet valve
in the seat and check for tightness
by filling with water. If the ball in the
seat fails to seal, then the ball or the
seat must be changed, if necessary
both components.
Thin the material
Check the upper seat and the ball for
damage using water (see above). If
the ball fails to seal the seat, ex-
change damaged components.
Replace the packings.
Fill the material container. Thin if
material is too highly viscous. Open
the circulation valve to allow air to
escape. Dismantle the inlet valve.
Clean valve and seat.
Check all connections for leaks bet-
ween pump and gun.
Close circulation valve. If material is
still exiting, check valve for damage.
If none of the above applies, replace
the lower packing.