When using abrasive feed chemicals, the diaphragm service life is
reduced. In such cases, more frequent checking of the diaphragm is rec‐
ommended.
Data Value Unit
Tightening torques for dosing head
screws:
4.5 ... 5.0 Nm
WARNING!
Warning of eye injuries
When opening the relief valve, a spring under high tension
can jump out.
– Wear protective glasses.
Draining gear oil
1. Remove the vent screw (1).
2. Place an oil trough under the oil drain plug (2).
3. Unscrew the oil drain plug (2) from the power end housing.
4. Allow the gear oil to run out of the power end.
5. Screw in the oil drain plug (2) with a new seal.
Filling with gear oil
Prerequisites: Gear oil according to the "Ordering information" chapter is
available.
1. Slowly pour gear oil through the vent screw (1) opening until the oil
inspection window (3) is half covered.
2. Allow the pump to run for 1... 2 minutes
3. Replace the vent screw (1).
Tightening torques
Liquid ends with integral relief valve
Changing gear oil
Fig. 20
Maintenance
33
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