Multiquip AP6 Series - Manual (Page 49)

AP6/AP8 SERIES TRASH PUMPS • OPERATION AND PARTS MANUAL — REV. #0 (06/11/14) — PAGE 49
MAINTENANCE (PUMP)
PUMP FLUSHING
1. Remove the 3 square head vent plugs (Figure 39)
from the volute.
Figure 39. Plug Removal (2)
2. Remove the bolts (2) that secure the clean-out cover
(Figure 40) volute casing.
3. Remove clean-out cover and o-ring.
NOTICE
Before attemping any maintenance procedures on the
pump, ALWAYS disconnect the negative battery cable
from the battery.
Refer to the
Pump End Assembly drawing in the parts
section of this manual for item numbers referenced in
the maintenance procedures shown below and on the
preeceeding pages.
NOTICE
Proper pump care requires that the pump volute
chamber be flushed with clean fresh water, to ensure
that no corrosive liquids or potentially damaging
particles are left inside the pump during idle periods.
SQUARE HEAD
PLUG (3)
REMOVE
VOLUTE
Figure 40. Clean-Out Cover Removal
4. Place the volute drain valve (Figure 41) in the OPEN
position.
Figure 41. Volute Drain Valve (Open)
5. Flush the pump from the discharge side, using a high
velocity stream of fresh water.
6. Continue flushing until clear water comes out of each
drain plug, especially the bottom drain valve.
7. Reinstall the 3 square head vent plugs.
8. Reinstall the cleanout cover on the volute.
9. Place volute drain valve in the
CLOSED position.
CLEAN-OUT
COVER
REMOVE
O-RING
REMOVE
REMOVE
BOLT
VOLUTE DRAIN
VALVE
CLOSED
OPEN