Multiquip AP6 Series - Manual (Page 50)

PAGE 50 — AP6/AP8 SERIES TRASH PUMPS • OPERATION AND PARTS MANUAL — REV. #0 (06/11/14)
Testing the Venturi Nozzle
1. Using a flat blade screw driver, disconnect the hose
(Figure 42) connected to the suction chamber ball
valve.
Figure 42. Venturi Hose Disconnection
2. Attach a 0 to 30 inch vacuum gauge to the free end of
the venturi hose as shown in Figure 43.
Figure 43. Vacuum Gauge
3. Start the engine. The test gauge should read 25 in. Hg.
4. If the vacuum reads 25 in. Hg or higher, then it can be
assumed the pump is working correctly.
5. Stop the engine. Remove the gauge, and reconnect the
venturi hose to the suction chamber ball valve.
SUCTIO
N CHAMBER
BALL
VALVE
HOSE
CLAMP
VENTURI
HOSE
VACUUM
GUAGE
SUCTIO
N
CHAMBER
VENTURI
HOSE
MAINTENANCE (PUMP)
Checking Operation of Float Assembly
1. Remove the 4 wrench nuts (Figure 44) from the top of
the suction chamber.
Figure 44. Wrench Nut Removal
2. Carefully remove the float assembly, and place it on
top of the suction chamber, as shown in Figure 45.
Figure 45. Float Assembly Removal
SUCTIO
N
CHAMBER
WRENCH
NUTS (4)
REMOVE
SUCTIO
N CHAMBER
FLOAT
ASSEMBLY
TOP