8.
Turn the rotor with the help of the motor so that the remaining
roller presses against the pump hose
9.
Re-attach the second roller with spacer plates back onto the
rotor
10. Attach the front cover to the pump housing
11. Mount the pump hoses from both discharge and suction
sides
12. Open all of the valves
7.3
Troubleshooting
Problem
Possible cause
Solution
Increased pump temperature
Pump hose has no lubricant
Lubricate pump hose
Increased product temperature
Reduce product temperature
Insufficient or poor suction condi‐
tions
Check suction line for blockages
Pump speed too high
Reduce pump speed
Reduced flow or pressure
Valves on discharge and or
suction side completely or partially
closed
Open valves
Pump hose insufficiently
compressed
Check roller fastening
Pump hose rupture (the product
leaks out into the housing)
Exchange pump hose
Partial blockage of the suction line Clean pipe
Insufficient product quantity in
storage container
Fill storage container or exchange
pump
Insufficient diameter on the
suction side
Increase the diameter on the
suctions side, as far as possible
Suction line too long
Shorten the suction line, as far as
possible
High viscosity of medium
Reduce viscosity, as far as
possible
Air introduction in the suction
connections
Check connections and accesso‐
ries for air tightness
Vibrations on pumps and pipelines The pipes are not correctly
fastened
Fasten pipes correctly (e.g. wall
brackets)
Pump speed too high
Reduce pump speed
Insufficient nominal width of the
pipes
Increase nominal width
Pump base plate loose
Fasten base plate
Pulsation dampers insufficient or
missing
Install pulsation dampers on
suction and / or discharge side.
Short operational lifetime of the
hoses
Chemical exposure
Check the compatibility of the
hose with the liquid being
conveyed, the cleaning fluid and
the lubricant
Maintenance, repair, malfunctions, disposal and spare parts
32
