Inspection of
Action
Cable Entry
Make sure that the cable clamps are tight.
If the cable entry leaks:
check that the entry is firmly tightened into its bottom-most
position.
cut a piece of the cable off so that the seal sleeve closes around a
new position on the cable.
replace the seal sleeve.
check that the seal sleeve and the washers conform to the outside
diameter of the cables.
Cables
Replace the cable if the outer jacket is damaged. Make sure that the cables
do not have any sharp bends and are not pinched.
Level sensors or other
Check function. Clean, adjust, replace or repair damaged
level equipment
level sensing equipment. Follow the instructions for the
level sensing equipment in question.
NOTE. The level sensor contains a mercury switch. Damaged sensors
should be disposed of in a proper manner.
Starter equipment
If faulty, contact an electrician.
Monitoring equipment
Check:
(should be checked often)
- signals and tripping function.
- that relays, lamp, fuses and connections are intact.
Replace defective equipment.
Rotation direction of pump
Transpose two phase leads if the impeller does not rotate
(requires voltage)
clockwise as viewed from above. Rotation in the wrong direction reduces
the capacity of the pump and the motor may be overloaded. Check the
direction of rotation, during non-load every time the pump is reconnected.
Pipes, valves and other
Repair faults.
peripheral equipment
Insulation resistance in the stator
Use insulation tester. With a 1000 V-DC megger the insulation between
the phases and between any phase and ground should be > 1 MΩ.
Maintenance
Changing the Oil
Oil casing
WARNING. If the seal leaks, the oil casing may be under pressure. Hold a rag over the oil plug to prevent splatter.
1.
Lay the pump on its side on a bench or over two supports.
2.
Unscrew the oil casing screw.
3.
Turn the pump so that the oil hole faces downwards. In order to get out all the oil, the pump must be raised
upright for a short while during drainage.
4.
Fill up with 0.18 quarts of SAE 10W-30 motor oil. Always replace the O-rings of the oil hole screws. Put
the screws back and tighten them.
5.
A paraffin oil approved by authorities (e.g. Mobil Whiterex 309) is recommended for raw or clean water
pumping.
