Prestart Checklist; Starting The Unit - Generac Power Systems MAGNUM MTP4SZ Owner's Manual

NOTE: Flexible pipe couplings must be restrained so as
not to transmit any strain to the pump flanges when
expanding or contracting under pressure. Unrestrained
expansion fittings can transmit enormous forces to the
pump flanges.
CAUTION
Equipment damage. Use recommended strainer to
prevent debris from entering the pump. Failure to do
so could result in equipment damage.

Prestart Checklist

 Verify all fasteners at gasketed surfaces are properly
tightened.
 Verify belts and couplings (shaft) are properly
adjusted and aligned, and all guards are in place.
 Verify all protective covers and screens are in place.
 Verify pump drain is closed.
 Check the valves for proper position. If connecting to
a system that has a discharge gate valve, start with
the valve closed. The speed of opening depends
upon the size and length of the discharge pipe and
capacity of the pump. The valve should not be more
than 0.25 in. (6.35 mm) open until the line is filled.
This will reduce the possibility of a water hammer of
shock if filling is too rapid.
 Verify all hose couplings, covers and plugs are tight.
WARNING
Personal Injury. Verify all hoses are securely
fastened. Failure to do so could result in death
or serious injury.
 Check the oil level in the mechanical seal oil
reservoir bottle. Do not allow the bottle to run dry.
 For diaphragm vacuum pumps: Check the oil level in
the sight glass located at the base of the assembly.
Add oil if necessary.
CAUTION
Equipment damage. Verify proper type and quantity
of oil prior to starting pump. Failure to do so could
result in pump damage.
 Check lip seal vent for leakage. The bearing oil and
mechanical seal oil are each sealed by a shaft lip
seal, and a vent to atmosphere exists between these
two lip seals to indicate oil leaks from either cavity. If
either the bearing oil or mechanical seal oil lip seals
leak, oil will leak from the vent.
Owner's Manual for Wet-Prime Trash Pumps
A
B
(000241)
A. Engine Bracket
B. Drive End Lip Seal
C. Pump End Lip Seals
D. Oil Leak Path
 Check the engine oil level, coolant level and fuel
level.
 Verify the battery is connected.
 Verify the Emergency Stop switch is pulled out
(deactivated).
The unit is now ready for use.

Starting the Unit

Turn the key switch to the right RUN position. A
1.
startup screen will appear. After the startup screen
is cleared, the display will show readings on virtual
gauges.
Once the gauges appear, crank the engine by
2.
turning and holding the key switch in the start
position until the engine starts. Refer to
(000272)
Panel Operation
The pump should self prime and begin to discharge
3.
liquid within minutes.
NOTE: The pump may not prime immediately because
the suction line must first fill with liquid. If the pump fails
to prime within five minutes, stop it and check the suction
line for leaks.
NOTE: Refer to
adjusting the pump flow. Several factors can influence
pump output:
• The temperature, viscosity, and amount of
(000275)
entrained solids in the liquid being moved.
• The length, diameter, and number of bends of the
intake and outlet hoses.
• The total suction height (lift) of the pump.
D
Figure 3-50. Lip Seals
for details.
Throttle Control for information on
Operation
C
002303
Control
35