Repair manual

Repair PS2 500, PSA2 500
Repair.fm 74
4. Visually inspect the upper and lower bearing (au & ax) for wear,
corrosion or rust. Manually test lower ball bearing (ax) for any side
to side movement, vibration or damage to the inside or outside
diameter.
—Replace every 6,000 hours of service or one year, whichever
comes first.
5. Visually inspect mechanical seal (am) for wear, cracks or damage.
Look carefully at flexible components, replace if deformed.
Note: Pay particular attention to sealing faces that butt up against
each other. They are divided by a thin oil film that prevents
water from entering motor. Replace entire mechanical seal
(am) if worn, damaged or cracked. Replace every 6,000
hours of service or one year, whichever comes first.
6.3.2.3 Motor Testing
Test Stator Insulation Resistance
1. Dry stator (ar) thoroughly and allow it to cool before testing.
2. Measure resistance between the stator’s lead wire and the motor
frame using Megger tester.
—Replace if test results fall below 20 MΩ.
Test Stator Continuity
Test continuity between phase wire ends.
—Replace stator if any breaks are found.
Test Wire Resistance
Measure resistance of each phase using Megger tester.
—Replace the stator if test results fluctuate more that ±5% of the
manufacturer’s specification.
Locked Rotor Current Test
Lock rotor (av) and apply 25% of rated voltage by lock transformer or
regulator.
—Current measurement test results should be similar to rated
current.
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