TM 10-4610-215-24
TM 08580A-24/2
Table 3-1. Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
R.O. PUMP
1. LOSS OF PRESSURE OR VOLUME, ERRATIC POUNDING IN FLUID END ASSEMBLY.
Step 1.
Check for leaks in suction line.
a. Tighten fittings.
b. Replace damaged pipe.
WARNING
ROWPU piping and equipment can contain extremely high
pressure during and after operation. If this pressure is not
relieved before working on the pipes or equipment, serious injury
or death can occur. Be sure to open all drains and vents before
beginning any disassembly.
Step 2. Check for slightly opened or leaking relief valve.
a. Close relief valve.
b. Replace if damaged.
Step 3. Check for foreign matter holding valves open
Clean valves.
Step 4. Check for broken valve springs or worn valves.
Replace damaged parts.
2. CONSISTENT KNOCK.
NOTE
High-speed pumps will have valve noise even when new. Check
valve noise only if erratic. See malfunctions 1 and 3.
Step 1.
Check to see if plunger is loose from crosshead,
Tighten onto crosshead or replace if damaged.
Step 2. Check for worn or loose main bearings, bearing cones, or bearing cups.
Replace damaged parts.
3 -5
