Maintenance
34
© Lutz-Jesco GmbH 2020
BA-10491-02-V01
Piston diaphragm dosing pump
MEMDOS KMS LB/LA
Operating instructions
Maintenance work
Frequency
Clean suction and pressure valves Regularly
Check that electrical connections
are not damaged
Regularly
Tighten up dosing head bolts
n
Regularly
n
Before initial commissioning
n
After each diaphragm change
Check diaphragm for leakage due
to rupture
Regularly (as long as no leak
monitoring system is installed)
Check the dosing pump for
unusual noises during operation,
unusual temperatures or smells
Regularly
Replace parts that are subject to
wear (diaphragms, valves, seals,
etc.)
When unacceptable levels of wear
are detected
Rinse out and clean the dosing
pump
n
Before taking out of service for
a long period of time
n
After feeding aggressive,
sticky, crystallising or contam-
inated liquids
Checking the electric servomotor
Regularly
Tab. 29: Maintenance information and maintenance intervals
12.2 Change the oil
Fig. 17: Draining oil on the dosing pump
Resources required:
@
Oil collecting pan
@
Low viscosity oil of the viscosity class ISO-VG100 (SAE 40)
Perform the following working steps:
1.
Unscrew the closing screw (1) from the oil drain (2).
2.
Completely drain the oil from the housing into oil collection container.
3.
Place the washer seal onto the oil outlet and tighten up the closing
screw.
4
5
7
6
Fig. 18: Dosing pump oil inlet
4.
Unscrew the closing screw (4) from the oil inlet (6) and remove the
seal (5).
5.
Fill oil in the oil inlet. Check the oil level in the oil level glass (7) at the
same time. The oil level should reach to c. the middle of the oil level
glass.
6.
Place the washer seal (5) onto the oil inlet (6) and tighten up the clos-
ing screw (4).
ü
Oil change complete.
12.3 Tightening the dosing head nuts
Comply with the following rules when tightening the dosing head nuts:
n
Use a torque wrench.
n
Moisten the thread of the nuts lightly with oil.
n
Always tighten the nuts crosswise.
n
Tighten the nuts in four steps: with 27 Nm, 34 Nm, 40 Nm and the last
step with 48 Nm.
2
1
