Multiquip AP6 Series - Manual (Page 19)

AP6/AP8 SERIES TRASH PUMPS • OPERATION AND PARTS MANUAL — REV. #0 (06/11/14) — PAGE 19
GENERAL INFORMATION
The Multiquip AP6/AP8 series pumps are automatic prime-
assist pumps that can handle dewatering, sewer bypass,
and wellpoint applications.
The AP6/AP8 series pumps use a vacuum pump to remove
the air. This becomes important in certain applications such
as long suction hose runs or multiple suction points (such
as wellpoints). In these cases, high volumes of air enters
into the pump.
The AP6/AP8 series pumps use direct-drive vacuum pump
to efficiently remove very large volumes of air quickly to
obtain the priming necessary for these special applications.
The AP6/AP8 series pumps are very useful when you have
to move a lot of water fast.
IMPELLER
The impeller used on the AP6/AP8 series pumps has a
patented design to eliminate cavitation. It is a closed 2-blade
spiral, smooth flow, open, non-clog impeller, designed to
handle up to 3 or 4 inch solids depending on pump model.
The impeller pulls water directly into the pump from the
priming tank, reducing friction losses, and then pushes
it out the volute discharge. This design does not cause
turbulence normally found in centrifugal pumps.
WEAR PLATE
In conjunction with the impeller, the wear plate gives a
perfect match for great pump performance and durability.
The wear plate can be fully adjusted up to .6 inch (15 mm)
for wear.
PRIMING SYSTEM
The vacuum system is innovative, simple, yet rugged and
dependable. It uses direct drive which means no belt failure
and with only one moving part, means no maintenance.
It uses liquid-ring design with a closed water system.
Separate oil bath lubrication, for the seal and bearings with
oil reservoir, can run dry without damage. It operates quietly
with no pollution or unwanted discharge noise.
FLOAT AND BACKFLUSH (PRIMING TANK)
The priming tank float is a one-piece welded construction,
rubber valve seat, self-aligning rubber hinge. This design
increases reliability. The backflush valve allows for cleaning
of the suction strainer or wellpoint heads while the engine
is running.
FUEL SYSTEM
The AP6 and AP8 series pumps have fuel tanks integrated
into the trailer. These fuel tanks provide each pump with the
capability for continuous running for long-term jobs. There
are two corner fuel drains to check the condition of the fuel.
AP6 Series Fuel Tank
Fuel tank capacity for the AP6 series pumps is 50 gallons
(189 liters) with a run time of 28 hours @1800 rpm or 39
hours @1600 rpm.
AP8 Series Fuel Tank
Fuel tank capacity for the AP8 series pumps is 55 gallons
(208 liters) with a run time of 28 hours @2000 rpm.
FRAME AND TRACKBAR SYSTEM
The TrackBar system allows for the easy addition of jack
stands, fenders, axle, lifting bail, and other options.
This allows for fast and easy positioning of the jack stands
on the job site to fit the application, or to add subtract jack
stands as required. The removable, retractable towing
tongue minimizes storage requirements.
VOLUTE
The pump volute has an external inspection/clean-out cover
to inspect or clear the impeller. The pump shaft bearings
and mechanical seal are run in independent oil baths for
low maintenance.
LOFA ENGINE CONTROL PANEL
This control panel provides five engine status gauges (oil
pressure, tachometer, high coolant temperature, hour meter
and volt meter) along with engine shutdown capability in
the event of low oil pressure, high coolant temperature, and
alternator belt breakage.
An optional auto-start module is also available with float
switch capability which is designed for the automatic start-
stop of the pump. Additionally, audible and visual alerts
signal engine restarting through a control panel alarm and
beacon attachment.