Replace P-3 Pump Assembly
Ensure that all electrical power at the p-4 Pump is shut off and disconnected before
proceeding. The circuit breaker box or individual circuit breaker should be locked and
tagged out by personnel following this procedure. Remember that the CBL is a wet
environment. Serious injury or death to personnel can result from electrocution if proper
safety precautions are not observed.
Ensure graywater pipes have been sanitized IAW procedures contained in TB MED 577
before attempting any repairs. Failure to observe safety precautions may result in
serious illness or death from biohazards.
Removal of the P-3 Pump Assembly may be easier if Washer No. 2 has been removed
1. Disconnect power by switching circuit breaker No. 15, 17, and 19 to OFF, and drain pump.
2. Remove insulation (Figure 5, Item 14) and heat trace from pump, and drain all water from system.
3. Loosen hose clamp retaining pump discharge hose (Figure 5, Item 15), and remove pump discharge
4. Loosen hose clamp retaining pump suction hose (Figure 5, Item 16) and remove pump suction hose.
5. Note alignment of pump discharge fittings (Figure 5, Item 17) and unscrew fittings as an assembly
from the pump housing.
6. Note alignment of pump suction fittings (Figure 6, Item 18) and unscrew fittings as an assembly from
the pump housing.
7. Remove screws, washers, rubber isolation washers, and nuts retaining pump upper mount (Figure 5,
Item 19) to pump lower mount (Figure 5, Item 20) and remove pump assembly (Figure 5, Item 21).
8. Remove screws retaining pump end cover (Figure 5, Item 1) and remove pump end cover.
9. Tag and disconnect motor leads (Figure 5, Item 2).
10. Remove locknut retaining conduit (Figure 5, Item 13) to motor (Figure 5, Item 14) and remove
11. Remove screws, washers, and nuts retaining pump motor (Figure 5, Item 4) to pump upper mount
(Figure 5, Item 19).