(3) Remove two wingnuts (7) securing barrel cover (8) from studs, then loosen, but do not remove, two
nuts (11) securing wiper box gland.
(4) Remove suction/discharge assembly (2) from R.O. pump power frame.
Any nicks on the main plunger body will cause prompt and
frequent packing failure. Apply wrench only to knurled surface of
plunger; handle plunger carefully.
(5) Push rubber baffle disc (12) off knurled surface and carefully unscrew plunger (13) from crosshead
using a wrench on the knurled surface of the plunger.
(6) Slide baffle disc (12) from plunger (13) and remove plunger (13) from pump power frame.
(7) Unscrew and remove gland nut (9) and power frame adapter (10).
Each packing unit consists of a ring with a top and bottom
adapter. These parts may separate during disassembly.
(8) Remove one packing ring (4), lantern ring (5), two more packing rings (4), spring (3), and one throat
bushing (6) from each cylinder bore on suction/discharge assembly. Discard packing rings (4).
c. Disassembly for Repair. (Figure 3-7)
(1) Remove five valve covers (14) and five valve cover gaskets (15) from suction/discharge assembly (2).
Discard valve cover gaskets (15).
(2) Remove five nuts (16), five retainers (17), five springs (18) five sleeves (19), and five discs (20) from
five seats (21).
(3) With the valve seat puller, remove five valve seats (21) from suction/discharge assembly (2).
(4) Remove five cylinder heads (22) and five cylinder head gaskets (23) from suction/discharge assembly
(2). Discard cylinder head gaskets (23).
(5) Repeat Steps (2) and (3) to remove five suction valve assemblies. Parts can be removed from the
suction/discharge assembly (2) through the cylinder head opening.
(6) Remove five plugs (24) from suction/discharge assembly (2).
Objects blown by compressed air can cause severe eye injury.
Always wear protective goggles when using compressed air.
(1) Wash suction/discharge assembly inside and outside with strong soap solution.
(2) Rinse with clean water and dry with compressed air.
(3) Prepare for painting, if necessary.