Repair manual

PS4 7503HH, PS4 7503HF, PS4 11003HH, PS4 11003HF Repair
Repair.fm 191
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 and apply 25% of rated voltage by lock transformer or
regulator.
—Current measurement test results should 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).
3. Hold the vacuum position for 10 seconds. The gauge should
remain absolutely stable.
—Replace mechanical seal upon failing vacuum test.
Test Thermal Protection (CTP)
1. Clean the points of the circle thermal protector (CTP).
2. Check the insulation resistance between each phase connection
on the protector and ground.
—Not less than 30 MΩ with 500V Megger.
6.8.2.4 Motor Reassembly
Note: If, upon inspection and testing, a pump component requires
replacement, use only original manufacturer’s replacement
cables complete with anti-wicking block assembly and
certified for submersible use.
Note: Use only new gaskets and o-rings when rebuilding pump.
1. First, assemble the oil housing assembly (cz). Set oil housing (cn)
rightside up on a clean, flat surface.
2. Install o-ring (by) to oil housing (cn).
3. Install seal (cm) to oil housing (cn).