3.Place a few drops of oil on felt liner in head assembly.
4.Check brush set for wear and replace if necessary.
5.Blow dirt and dust out of motor housing and check for shorts, burnt wires, or open circuits in the field coil assembly.
6.Check armature and commentator for shorts or open circuits.
7.Check ball bearings on motor shaft, a growling motor can be caused by bad bearings.
8.Check for excessive "end play" of armature and add thrust washers as required.
9.If there is an excessive amount of water, condensation, or rust in the motor, a small drain hole may be drilled in the motor case on the low side of the motor depending on the mounting; consult with factory for additional information.
NOTE: A motor that does not turn in freezing weather could be caused by water that has frozen inside the housing.
10.All Monarch DC motors turn counterclockwise when viewed from drive end; it checks it when replacing motor with new one.
11.If motor fails to turn the pump, check the pump by turning drive shaft by hand.
F.Electrical Switches
Defective switches are a common cause of electrical malfunction. What seems to be a serious system defect can often be caused simply by a faulty switch, especially where the switch controls two functions, that is, start the motor and shift a valve. In most cases one half of the switch might be defective while the other half operates correctly and the fault appears to be with some other component. Trouble shooting can be done by any one of the three methods:
1.Use”continuity light" to test switch. (See Test Equipment Section)
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