Repair manual

PS2 750 Repair

Repair.fm 97

6. Pull impeller (am). A puller, part number 0151079, may be

required. Remove key (be) from rotor shaft for inspection.

6.4.3.2 Impeller Inspection

1. Visually inspect impeller (am) for corrosion, wear or damage. Worn

impellers compromise peak performance.

2. Visually inspect impeller key (be) and rotor shaft keyway for signs

of uneven wear.

3. Visually inspect volute (bb) casting for cracks, wear and damage.

Look for signs of wear on volute cutwaters, suction cover or

wearplate surfaces facing impeller.

Note: If, after disassembly and inspection, volute is found to be

damaged, worn or cracked; entire pump must be

disassembled to replace volute.

6.4.3.3 Impeller Clearance

1. Measure the distance between impeller and volute after assembly.

Keep a recommended clearance of 0.3–0.5mm (0.118–0.196in).

—If measured distance between impeller is greater than 0.5mm

(0.196in), pumping capacity drops.

—If measured distance between impeller is less than 0.3mm

(0.118in), impeller may contact volute, slow rotation, overload

motor and cause premature failure.

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