34
Original operation manual
2K GEL UNIT
2KGel_14025_25015_BAoDB_en_1701 • rs
Eliminating operational faults
7 Eliminating operational faults
Fault
Possible cause
Remedy
Pump does not start despite
operation of the mixing unit.
Compressed air shut-off valve
closed.
Open the compressed air shut-off
valve.
Air motor does not start up or stops. Push in pin on the
air motor with a
small screwdriver.
Only use clean air.
Air motor defective.
Repair air motor using the spare
parts list and repair manual
(if necessary, contact customer
service).
Pump is running, but no injection
material is being conveyed to the
outlet of the mixing unit.
Suction hose blocked.
Replace hose.
The one-hand lever of the mixing
unit is set to "Stop".
Set the one-hand lever of the mixing
unit to "Injection".
The ball in the bottom valve does not
lift (stuck).
Move the bottom valve to the side
with a slight impact (hammer).
Unscrew suction system and press
out the ball in the bottom valve
from the bottom using a pin or
a screwdriver.
Bottom valve does not close.
Unscrew the bottom valve and clean
the ball and the seat thoroughly.
Pump conveys material, but does
not stop when the mixing unit is
closed.
Packing or valve worn out.
Replace parts.
Pump runs smoothly, but the
required injection pressure is not
achieved.
Air pressure is too low or too little air. Increase the air pressure on the
compressed air regulator or check
the air line for the correct cross-
section.
Air motor is iced (runs too slowly).
Reduce the air inlet pressure if
possible.
If not present, attach maintenance
unit with oiler. Fill the oiler with anti-
freeze agent (Glysantin) and set
according to the instructions in the
operation manual: the guideline is 1
drop for approx. 10 double strokes.
The pump does not run consistently
(recognizable by the different
stroke speeds of the upstrokes and
downstrokes) and does not reach
the required injection pressure.
Suction system leaking.
The gaskets on all threaded
connections of the suction pipe.
Bottom valve is leaking (pump only
stops in the upstroke when mixing
unit is closed).
Unscrew the bottom valve and clean
the ball and the seat thoroughly, if
necessary replace the ball or the
valve seat.
Piston valve is leaking (pump only
stops in the downstroke when mixing
unit is closed).
Clean and check the ball and seat in
the double piston, replace the ball or
valve seat as required.
Lower or upper packing leaks
(wear).
Replace the packing.
