R.O. PUMP ASSEMBLY POWER END REPAIR (MODELS WPES-10, WPES-20, and WPES-30) -
Insert crossheads (27) in power frame (30).
To install bearing cones, use an arbor press or heat cones to 300° F at inner race.
Install bearing cones (22 and 23) on crankshaft (24) and position crankshaft in power frame (30) as
Install bearing cups (21 and 22) in power frame (30).
Install seals (18 and 19) on end caps (13 and 16), tapping seal lightly with a soft mallet.
Shims are provided in thicknesses of 0.005, 0.007 and 0.020 inch. For best results a
0.005 and a 0.020 inch shim should be installed to provide a starting point for initial
measurement. Some shims may need to be removed, or additional shims added to obtain
correct shaft end play.
Install shims (17 and 14), end caps (16 and 13) and screws (12 and 15). Check/adjust end play as follows:
Install a dial gage as indicated.
Push crankshaft (24) all the way to one side and zero dial gage.
Push crankshaft (24) to other side and note end play on dial gage.
If necessary, add or remove shims (14 and 17) for correct end play of 0.001 to 0.003 inch.
When shimming is correct, connecting rods and pin bearings of connecting rods should
be positioned near center of crosshead walls and should not touch walls.
Check if connecting rod pin bearings and/or connecting rods (26) touch inside wall of crosshead
As necessary, transfer shims (16 and 14) from one side to the other to ensure that pin bearings are
positioned properly and do not touch inside of crosshead openings.
When adjustment is complete, torque screws (12 and 15) to 20 pounds/foot.
4-6 Change 1