Shutting Down The Pump; Maintenance; Disassembling The Pump; Cleaning And Inspecting The Pump Components - Dometic PS250 Manual De Instalacion Y Uso

Maintenance

7.3 Shutting Down the Pump

1. Turn off the power to the pump.
2. If shutting down the pump for maintenance or
winterization:
a. Flush the pump to remove contaminants.
b. Drain it completely to remove internal pressure.
3. Close the suction valve at the thru-hull water inlet.
4. Close the discharge valve, if installed.
8 Maintenance

WARNING: ELECTRICAL SHOCK, FIRE, AND/OR
EXPLOSION HAZARD.
Always disconnect the unit from power before
cleaning and/or servicing. Maintenance must be
done by a qualified service person only. Failure to
obey this warning could result in death or serious
injury.
NOTICE: Before performing maintenance on this pump,
it must be flushed and drained of all fluids.
The maintenance and cleaning instructions provided in
this section should be performed as needed. Failure to
properly maintain the appliance may void the warranty
and could result in unsafe operation. Preventive
maintenance is not covered under the warranty.
If the pump flow is low, disassemble the pump and
inspect the pump components for debris, wear, and
damage.

8.1 Disassembling the Pump

1. Shut down the pump.
2. Disconnect the pump from the power supply.
3. Close the seacock. See Figure 7.
4. Loosen the hose clamps and remove the hoses from
the pump.
5. Remove the front cover screws securing the front
cover to the rear pump housing and motor assembly.
See "Component Locations" on page 8.
6. Remove the front cover screws.
12
7. Firmly hold the motor assembly and pull the front
cover to remove it from the rear pump housing.
8. Remove one rubber cap from the impeller shaft.
9. Remove the impeller shaft, ceramic thrust washer,
and the impeller assembly.
10. Remove the impeller shaft, ceramic thrust washer and
remaining rubber cap.
11. Remove the rear pump housing and rear housing
barrier o-ring from the motor assembly.
8.2 Cleaning and Inspecting the
Pump Components
1. Clean the pump components with a mild cleanser,
removing any debris or abrasive material.
2. Check the pump housing for signs of wear or
damage.
3. Inspect the impeller shaft and rubber caps for
damage.
4. Check the running surface between the impeller
assembly, rear pump housing, and the front cover for
wear.
5. Check the wet end assembly components for signs of
rubbing, cracking, or wear.
6. Check the rear housing barrier o-ring, front cover
o-ring, and motor cooling tube seals for swelling,
brittleness, cuts, or other damage.
7. Replace the wet end assembly if there are signs of
excessive wear, damage, or cracking in any of the
components.
I The wet end assembly components are only
available as a wet end assembly service kit.
8. Check the motor bearings by rotating the motor
manually. If the shaft rotation is not smooth or has
radial/axial end-play, replace the pump.
Submersible Pump
EN