Fig.21: Checking the
leakage chamber
ü A suitable container for the leakage is on hand.
ü The pump set is placed horizontally on a level surface.
1. Place the container underneath screw plug 903.22.
2. Remove screw plug 903.22 with joint ring 411.22.
ð If there is no leakage or only a small amount (less than 0.2 litre) after several
years of operation, the mechanical seals are working properly. If the leakage
exceeds 0.2 litres, the mechanical seals are defective and must be replaced.
3. Close screw plug 903.22 with joint ring 411.22 again.
7.2.3.3 Changing the lubricant
WARNING
Lubricants posing a health hazard and/or hot lubricants
Hazard to persons and the environment!
▷ When draining the lubricant take appropriate measures to protect persons and
the environment.
▷ Wear safety clothing and a protective mask if required.
▷ Collect and dispose of any lubricants.
▷ Observe all legal regulations on the disposal of fluids posing a health hazard.
WARNING
Screw plugs subjected to pressure
When opening screw plugs, liquid might spurt out!
▷ Wear safety goggles and protective clothing, if required.
▷ Open the screw plug slowly.
Draining lubricants in a horizontal position
Fig.22: Draining the
lubricant
ü Have a suitable container on hand for the used lubricant.
1. Place the container underneath screw plug 903.46.
2. Remove screw plug 903.46 and joint ring 411.46 at the bottom side of the
bearing bracket and drain off the lubricant.
3. Fit screw plug 903.46 with joint ring 411.46.
Draining lubricants in a vertical position
Fig.23: Draining the
lubricant
ü Have a suitable container on hand for the used lubricant.
1. Hold the container underneath screw plug 903.46.
2. Remove screw plug 903.46 and joint ring 411.46. Then drain off the lubricant.
ð Due to the geometry of the discharge cover a small amount of lubricant will
remain in the oil reservoir.
3. Fit screw plug 903.46 with joint ring 411.46.
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