Repair manual

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

Repair.fm 195

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

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

Handle with care.

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

24.Using a pneumatic wrench, tighten acorn nut (be).

25.Install gasket (bf), and suction cover (bg) to volute (bn).

26.Secure suction cover (bg) with three bolts (bb) and three washers

(ba).

27.Measure the distance between the impeller (br) and the volute (bn)

after assembly. Keep a recommended clearance of 0.3–0.5mm

(0.118–0.196in).

—If the measured distance between the impeller is greater than

0.196

" (0.5mm), the pumping capacity drops.

—If the measured distance between the impeller is less than

0.3mm (0.118

"), the impeller may contact the volute and slow

rotation, overload the motor causing premature failure.

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