Repair manual
PS2 400 Repair
Repair.fm 61
6.2.3 Impeller Disassembly, Inspection, Testing and
Reassembly
6.2.3.1 Impeller Disassembly
Note: It is not necessary to drain the oil for disassembly and inspect
ion of the impeller (w) or volute (aa). However, drain oil if
further disassembly and testing is required.
1. Turn pump on its side.
2. Remove three nuts (af) and the suction strainer (ac).
3. Remove volute (aa) and volute gasket (ah).
4. While keeping the impeller (w) from rotating, remove stirrer nut (z),
lockwasher (y) and washer (z).
Note: Impeller vanes may be very sharp due to excessive wear.
Handle with care.
5. Remove impeller (w).
6. Remove dust seal (u) and sleeve (v).
6.2.3.2 Impeller Inspection
1. Visually inspect impeller (w) for corrosion, wear or damage. Worn
impellers compromise peak performance.
2. Visually inspect impeller key and rotor shaft keyway for signs of
uneven wear.
3. Visually inspect volute (aa) casting for cracks, wear and damage.
Look for signs of wear on volute cutwaters and surfaces facing
impeller.