Repair manual

PS4 7503HH, PS4 7503HF, PS4 11003HH, PS4 11003HF Repair

Repair.fm 189

30.Remove four bolts (ce) and bearing cover (cf).

6.8.2.2 Motor Inspection

1. Visually inspect rotor (cs) for corrosion, wear or damaged threads.

2. Measure the rotor (cs) for deflection using a dial gauge.

—Deflection at the center of the rotor should not exceed 0.10mm

(0.0039in).

—Deflection at the pump end of the shaft should not exceed

0.08mm (0.0031in).

3. Measure shaft diameter of rotor (cs).

—Shaft diameter wear should not exceed 0.10mm (0.0039in).

4. Visually inspect the upper bearing (cv) and lower bearing (cu) for

wear, corrosion or rust. Manually test the 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 (cj) for wear, cracks or damage.

Look carefully at flexible components, replace if deformed.

Note: Pay particular attention to the sealing faces that butt up

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

prevents water from entering the motor. Replace entire

mechanical seal if worn, damaged or cracked. Replace every

6,000 hours of service or one year, whichever comes first.

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