MP Pumps PETROLEUM SELF-PRIMING 5, 8, 10, 15 User Manual

PETROLEUM SELF-PRIMING CENTRIFUGAL PUMPS

INSTRUCTION BULLETIN

Read this bulletin in full before installing, operating or servicing this pump. If any of the warnings of

this bulletin are ignored serious injury or death could occur.

WARNING!

This pump was designed to handle volatile and flammable fluids. To reduce the risk of fire or
explosion keep pump in well ventilated area free of explosive atmosphere. Do not smoke where
the fuel is being handled, also keep away from any sparks or open flame. Do not operate pump
with either the suction or discharge valves fully closed as this will over heat the pump. If pump
becomes overheated allow to cool before next use.

Do not operate the pump in a manner that
it was not intended to be used.

Do not install a piping system that does Do not continue to operate the pumping
not allow for any flex due to expansion from system when unusual noise or vibration
heat generated by the pumping system.

Do not allow severe temperature changes Do not perform service or maintenance
to occur in a short time period within the when the pumping system is pressurized
pumping system.

Drain pump completely before switching Do not mount pump in conditions that high
fuel type that is to be pumped. piping loads exist on the pump flanges.

Do not continue to operate the pumping
system when a known leak exists or the
system starts to smoke.

occurs.

or hot.

MODELS:

PO Biodiesel, Diesel and Fuel Oil.

PG Gasoline, Kerosene, Avgas

Jet A and JP 8 Fuel.

PE Ethanol and E-85.

FORM 3074-A (2/08)

PRINTED IN THE U.S.A.

PETROLEUM SELF-PRIMING CENTRIFUGAL PUMPS

INSTRUCTION BULLETIN

It is important that this Instruction Bulletin be read carefully to fully familiarize yourself with the pump
assembly arrangement. The instructions contained herein pertain to installation and maintenance of the
pump assembly only. Check unit carefully to make certain that no parts are missing or have been broken
in shipment.

INSTALLATION

For optimum performance, place pump as close
to liquid source as possible to reduce suction lift
to a minimum. For best results, pump should be
installed not more than 15 feet above the liquid
supply. Set the unit on solid footing and as
nearly level as possible.

Pipe or hose of the same size as the provided
flanges should be used. Reinforced suction hose
is recommended providing greater flexibility and
prevents collapsing due to vacuum in the suction
line when pump is in operation. The suction line
should be as short as possible to keep friction
loss at a minimum. Use pipe sealant on all the
connections and make certain that all fittings are If the pump is to be left standing idle for any
tight, particularly on the suction line where an air length of time in freezing conditions, the pump
leak can prevent priming or reduce pump capacity.

OPERATION

pump and only requires priming prior to its initial
start. The pump will retain sufficient liquid for
self-priming thereafter.

The impeller on the PO,PG,PE 5 and 8 is
threaded to a stainless steel drive sleeve.
The impeller on the PO,PG,PE 10 and 15 has
stainless cover pressed on. The sleeve slips
over the drive shaft and is locked to the drive
shaft with a two piece clamp. This means that
a standard drive shaft is used - no special taper
or threads. It is easy to adjust or remove the
impeller.

This pump is equipped with a self-lubricated
shaft seal. The self-lubricated seal is lubricated
by the liquid in the pump. Operating the pump
dry will seriously damage the mechanical seal.

housing should be drained. A drain plug at the
base of the pump housing is provided for
draining.

DISASSEMBLYThis petroleum pump is a self-priming centrifugal

Disconnect power to prevent accidentally
starting.

If pump fails to prime or stops pumping, check for Disconnect lines and drain pump housing.
the following possible causes:

TO REMOVE PUMP HOUSING

1. No liquid in the pump housing

2. Air leak in the suction line due to loose
connections or pin holes in the hose.

3. Collapsed suction line or clogged strainer

4. Seal worn and leaked air.

5. Worn impeller - too much clearance
between impeller and wear plate.

6. Pump not running fast enough.

7. Suction lift is too high.

8. Trying to prime against too high a

MAINTENANCE

This pump is of simple construction with only
one moving part.

Remove cap screws and nuts holding pump
housing to base (where used).

Remove nuts and lock washers holding the
pump housing to adapter.

Loosen the housing and remove carefully to
prevent tearing gaskets.

TO REMOVE IMPELLER discharge head.

Remove impeller clamp nuts and clamp to
unlock impeller drive sleeve from drive shaft.