2-73. R.O. PUMP ASSEMBLY. (Figure 2-88)
a. General. The R.O. pump assembly supplies water under high pressure to the R.O. elements. This
paragraph describes removal, inspection, cleaning, and installation of the R.O. pump assembly.
Remove R.O. pump belt shroud in accordance with paragraph 275.
Remove R.O. pump belts in accordance with paragraph 276.
Remove R.O. pump pulley sheave in accordance with paragraph 277.
Drain oil from R.O. pump.
ROWPU piping and equipment can contain extremely high
pressure during and after operation. If this pressure IS not
relieved before working on these pipes or equipment, serious
injury or death can occur. Be sure to open all drains and vents
before beginning any disassembly.
Unscrew union on rupture disc piping assembly (1) between R.O. pump (8) and pulse dampener.
Remove rupture disc piping assembly (1) from R.O. pump (8).
Loosen two hose clamps on flexible suction hose (2). Discard hose clamps.
Disconnect suction hose (2) from R.O. pump (8).
Loosen hose clamp on flexible oil drain hose (3). Discard hose clamp.
Disconnect oil drain hose (3) from R.O. pump oil drain valve (10).
Loosen hose clamp on flexible water drain hose (4) on drain reducer (9). Discard hose clamp.
Disconnect water drain hose (4) from drain reducer (9).
Remove four nuts (5) and four lockwashers (6) from bolts (7).
Remove four bolts (7) from R.O. pump stand and R.O. pump (8).
Weight of R.O. pump is 658 pounds (298 kg). Attempting to
move it without proper equipment could cause serious injury.
Use equipment rated at 1 ton (0.91 tonne) or more to move R.O.
Remove R.O. pump (8) from R.O. pump stand.
Remove water drain reducer assembly (9) from R.O. pump (8).
(1) Wash R.O. pump using a strong soap solution and a stiff brush.
(2) Remove rust and loose paint.
(3) Prepare for painting, if necessary.
(4) Remove rust from nuts, screws, and washers.