2-72. R. O. PUMP ASSEMBLY MAINTENANCE.
Unit level maintenance of the R. O pump assembly is limited to replacement of the fluid pressure dampener, belt guard,
V-belts and drain plumbing Specific procedures are contained in the following paragraphs.
12-73. FLUID PRESSURE DAMPENER MAINTENANCE.
This task consists of:
General Mechanics Tool Kit (Appendix B, Section III, Item 4)
Tape, Anti-seize (Appendix C, Section II, Item 30)
Lockwasher (4) - MS35338-139
Gasket (2) M103873D03
ROWPU shutdown (TM 10-4610-240-10).
Power shutdown (power source manual).
ROWPU piping drained (TM 10-4610-240-10).
General Safety Instructions
ROWPU piping and equipment can contain extremely high pressure during and after operation. If this
pressure is not relieved before performing maintenance, serious injury or death may result. Be sure to
open all drains and vents before performing maintenance.
Fluid pressure dampener is heavy/difficult to handle.
Remove two nuts (3), two screws (1), clamp halves (2), and gasket (4).
Remove two nuts (9), two screws (12), clamp halves (10), and gasket (11).
Remove adapter (13) and elbow (5) from fluid pressure dampener (14).
Remove four nuts (7), lockwashers (6), flat washers (16) and screws (17).