HIGH PRESSURE PUMP (R.O. PUMP) REPAIR (MODELS WPES-10, WPES-20,
AND WPES-30) - continued.
Dry cleaning solvent, PD-680, C1 II, is highly toxic and can ignite
organic materials, nitrates, carbides and chlorates. Wear eye, skin and
respiratory protection. Use in well-ventilated area.
Clean large parts (power frame, fluid cylinder, etc.) with rags and cleaning solvent.
Clean all small items (bearings, bolts, etc.) by dipping in cleaning solvent.
Fluid Cylinder (15). Inspect cylinder for cracks, gouges, stripped threads and other
Valve Seats (24 and 40). Check valve seats for wear, scratches, stripped threads and
Plungers (25). Check for cracks and chips in ceramic coating of plungers and
damaged/stripped connecting nut or nut retainer.
Miscellaneous hardware. Check all remaining hardware for cracks, damaged threads,
excessive wear, corrosion, deformation and other damage making the item unserviceable.
Replace lockwashers, gaskets and preformed packing.
Replace defective and excessively worn components.
Place fluid cylinder (15) on a clean work bench and
Position valve seats (24 and 40) on top of
valve seat bores.
Position a socket (slightly smaller then
valve seat) on top of valve seat.
Position a large diameter brass pin on
inside surface of socket.
Tap pin with hammer until valve seat is
firmly lodged in valve block.
install valve seats (24 and 40) as
3-248 Change 1