MAINTENANCE
39
9.
Drive out the hose (A) from the pump housing
by jogging the drive motor.
8.5.2
Cleaning the pumphead
1.
Isolate the pump from the electrical supply.
2.
Remove the cover (B) by loosening the bolts
(A).
3.
Check the cover seal (C) and replace it if
necessary.
4.
Rinse the pumphead with clean water and
remove all residues. Clean the pockets in the
pump housing. Make sure that no rinsing water
remains in the pumphead.
5.
Check the rotor for wear or damage and replace
the rotor if necessary. Also refer to the
maintenance diagram in §
.
A
WARNING
During jogging the drive:
-
Do not stand in front of the pump
ports.
-
Do not try to guide the hose by
hand.
A
B
C
CAUTION
When the rotor is worn the compression
force of the hose decreases. A compres-
sion force that is too low results in a loss of
capacity due to the backflow of the process
fluid. Backflow results in a reduction of the
life of the pump hose.