R.O. PUMP ASSEMBLY POWER END REPAIR (MODELS WPES-10, WPES-20, and WPES-30) -
Dry cleaning solvent, PD-680, CL II, is highly toxic and can ignite organic materials,
nitrates, carbides and chlorates. Wear eye, skin and respiratory protection. Use in well-
Clean all components with cleaning solvent and rags.
Power Frame (30). Inspect frame for excessive wear, cracks, stripped threads and scratched or scored
bearing surfaces, particularily in the crosshead bores. If threads are stripped or power frame is cracked,
badly scratched or scored, or if difference between inside diameter of bore and outside diameter of
crosshead (with known good crosshead) excceeds 0.009 inch, power frame should be replaced.
Crossheads (27). Check crossheads for wear, scratches and stripped threads. If crosshead is severely
scratched, threads are stripped or, if difference between inside diameter of crosshead bore and outside
diameter of crosshead exceeds 0.009 inch, crosshead should be replaced.
Connecting Rods (26). Check rods for cracks, deformation and excessive wear. Replace if unserviceable.
Crankshaft (24) and Connecting Rod Bearings (24). Check for worn journals and damaged/ worn
bearings. If journals are rough, crankshaft should be replaced.
Miscellaneous Hardware. Check all remaining hardware for cracks, damaged threads, excessiver wear,
corrosion, deformation and other damage, making the item unserviceable. Replace unserviceable
Replace all seals.
Replace defective components.
Install bearings (11), bearing caps (10) as marked and screws (9). Torque screws to 20 pounds/foot.
Connect crossheads (27) to connecting rods (26), using pins (25).
Place power frame (30) on a clean work bench.
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