TM 55-1930-209-14&P-2
a.
Always use new seals and gaskets before reassembling components disassembled for repair. Be sure to
use only new seals and gaskets same as the original. Carefully install so as not to damage seals and
gaskets during assembly.
b.
When replacing O-rings, make sure all surfaces are clean and free of dirt, grit, or foreign material. Prior to
installation, apply a thin coat of silicone grease to O-ring for ease of assembly. Protect O-rings by
applying tape over threads, sharp corners, and edges.
c.
To ensure a leak-proof joint when replacing gaskets, make sure mating surfaces are clean and free of
old gasket material, adhesive, oil, or grease.
d.
When replacing electrical components, follow, proper procedures for soldering or crimping connections.
Check all grounding. Make sure current carrying members are properly insulated to avoid short-circuits.
Check insulation on wires and cables for abrasions and chafing. Repair or replace as necessary.
Table 4-1. Seawater Discharge Pump and Cooling Pump Troubleshooting
Problem
Probable Cause
Suggested Action
1.
Pump leaks around shaft
a.
Worn seal
a.
Replace seal (paragraph 4-7.2.1.2 for
seawater discharge pump or paragraph
4-7.2.8.2 for cooling pump)
2.
Pump does not deliver rated
capacity
a.
Impeller is worn or damaged
a.
Replace impeller (paragraph 4-7.2.2 for
seawater discharge pump or paragraph
4-7.2.8.2 for cooling pump)
b.
Leaks in suction line
b.
Inspect piping, repair leaks (paragraph
4-7.2.6)
c.
Seachest blocked
c.
Blowdown forward seachest in Void 2
Starboard (paragraph 3-3.8.1)
d.
Strainer basket clogged
d.
Change flow and clean basket (paragraph
4-7.2.3.2)
e.
Suction
valve
SW1
or
SW2
partially or fully closed
e.
Open valve
3.
Motor will not stop or stops
after running short time
a.
Seawater discharge pump OFF/
ON/START and local START/
STOP switches or cooling
a.
Test and repair (paragraph 4-7.2.6.2 for
seawater discharge pump or Table 4-2
and paragraph 4-7.2.7.2 for cooling pump)
b. Low input voltage pump motor
controller malfunctions
b.
Check voltage
4.
Motor runs too slow under
load
a.
Line voltage is too low
a.
Check line voltage (paragraph 4-7.2.6.2
for
seawater
discharge
pump
or
paragraph 4-7.2.7.2 for cooling pump)
4-2
