(4) Wipe tapered area of suction/discharge assembly that will hold valve seats with clean solvent.
(5) Wipe plungers with clean solvent on a fine emery cloth.
(6) Remove rust and loose paint from valve covers and cylinder heads.
(1) Inspect suction/discharge casing for damage.
(2) Inspect valve cover and cylinder head for damage.
(3) Inspect valve assemblies for broken or excessively worn valve seats or discs, broken springs, and
bent or broken retainers.
(4) Inspect mounting nuts for stripped heads or threads.
(5) Inspect visible portion of R.O. pump power frame.
f. Repair or Replace.
(1) Replace damaged nuts, bolts, screws, washers, and wingnuts.
(2) Replace damaged valve covers and cylinder heads.
(3) Replace all packing rings, gaskets, O-rings, and rubber baffle discs.
(4) Replace damaged or unserviceable lantern rings, throat bushings, barrel cover, power frame adapters,
gland nuts, plungers, retainers, springs, valve discs, valve seats, and plugs.
g. Reassembly. (Figure 3-7)
(1) Clean tapered area of valve seat.
(2) Place suction valve seat (21) into position in suction/discharge assembly (2). Cover with an old valve
A broken or distorted valve seat will cause the pump to
malfunction. Never install remaining valve parts before driving
valve seat into place.
(3) Place valve seat installer on old valve disc (20). Drive valve seat (21) into place with a hammer.
(4) Remove old valve disc (20) and discard.
(5) Install new valve disc (20), sleeve (19), spring (18), retainer (17), and nut (16).
(6) Repeat steps (1) through (5) to install four more suction valves and five discharge valves.
(7) Install five new valve cover gaskets (15) and five valve covers (14).
(1) Place five power frame adapters (10) into power frame.
(2) Place suction/discharge valve assembly (2) onto studs on pump power frame and secure with eight