Repair manual

Repair PS2 750

Repair.fm 90

4. Visually inspect upper and lower rotor bearing (bi & ay) for wear,

corrosion or rust. Manually test for any side to side movement or

vibration.

—Replace every 6,000 hours of service or one year, whichever

comes first.

5. Visually inspect mechanical seal (not shown) for wear, cracks or

damage. Look carefully at flexible components, replace if

deformed.

Note: Pay particular attention to sealing faces that but up against

each other. They are divided by a thin oil film which prevents

water from entering motor. Replace entire mechanical seal if

worn, damaged or cracked. Replace every 6,000 hours of

service or one year, whichever comes first.

6. Visually inspect circle thermal protector (CTP) for damage to

insulation materials, water or oil intrusion, heat discoloration of

bi-metal disc, or damage to bi-metal disc.

—Check to assure lead wires of stator windings are correctly and

securely connected to protector.

—Check for disconnection of lead wires, short-circuit, coil-burn, or

incorrect wiring.

6.4.2.3 Motor Testing

Test Stator Insulation Resistance

1. Dry stator (v) thoroughly and allow it to cool before testing.

2. Measure resistance between stator’s lead wire and motor frame

using Megger tester.

—Replace stator (v) if test results fall below 20 MΩ.

Test Stator Continuity

Test continuity between phase wire ends.

—Replace stator if any breaks are found.

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