Repair manual

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

Repair.fm 202

3. Visually inspect volute (bn) for wear and damage. Look for signs of

wear on volute cutwaters and surfaces facing impeller.

6.8.3.3 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.

6.8.3.4 Impeller Reassembly

Note: If, upon inspection and testing, a pump component requires

replacement, use only original manufacturer’s replacement

parts.

1. With the pump on its side, install shim (bq) to rotor shaft and

position key (bs) in the keyway of the rotor shaft.

See graphic wc_gr000708.

2. Align and install impeller (br) over keyway of rotor shaft.

Note: Impeller vanes may be very sharp due to excessive wear.

Handle with care.

3. Install thread cover (bc), lockwasher (bd) and acorn nut (be).

wc_gr000709

wc_gr000708