Repair manual

Repair PS2 400

Repair.fm 54

5. Visually inspect mechanical seal (ad) 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 which prevents

water from entering motor.Replace entire mechanical seal

(ad) if worn, damaged or cracked. Replace every 6,000 hours

of service or one year, whichever comes first.

6.2.2.3 Motor Testing

Test Stator Insulation Resistance

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

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

using Megger tester.

—Replace stator (aq) 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 stator if test results fluctuate more that ±5% of

manufacturer’s specification.

Locked Rotor Current Test

Lock rotor (an) and apply 25% of rated voltage by lock transformer or

regulator.

—Current measurement test results must be similar to rated

current.

Test Oil Chamber Pressure

1. After installing mechanical seal, attach a vacuum pump to oil

housing.

2. Raise negative pressure inside the oil chamber to 60 cmHg (11.6

in.Hg).

IMPORTANT: DO NOT exceed 60 cmHg (11.6 in.Hg).

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