Inspection of
Action
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 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 (OIL OUT).
3.
Turn the pump so that the oil hole faces downwards. It is easier to drain the oil if the other oil hole screw is
also removed.
4.
Fill up with 1.06 quarts (3102), 2.45 quarts (3127) of new oil (OIL IN). Always replace the O-rings under
the oil casing screw. Put the screws back and tighten them.
Use the following oil or their equivalent:
BP, Energol TOU 10W-30
Castrol, Castrolite 10W-30
Esso Extra Motor Oil 10W-30
Gulf Multi G 10W-30
Mobil Delvac Oil 1210
Delvac special 10W-30
Shell, Tractor Oil Universal 10W-30
Tellus T Oil 27
Shell Clavus Oil 27
Texaco Havoline Motor Oil 10W-40
Mobil Whiterex 309 or an equivalent paraffin oil is recommended for raw or clean water pumping.
Replacing the wear ring
When the clearance between the impeller skirt and the pump casing exceeds 0.08 in, the following replacement
must be made.
Replacing the wear ring in the pump casing.
1.
Disconnect and lift off the motor section from the pump casing.
2.
Knock out the wear ring using a chisel.
3.
Drive in the new wear ring. Use a rubber mallet or wooden block to prevent deformation.
The work will proceed more easily if the pump casing is first heated and/or the wear ring cooled.
Assembly
Before assembling the pump, check the O-ring and fit it in place.
