MP Pumps PETROLEUM SELF-PRIMING 30, 40 INSTRUCTION - Manual (Page 2)

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 PO, PG, PE 30 and 40 pump assembly only. Check unit carefully to make certain that no parts
are missing or have been broken in shipment. Your pump may been provided as a pumpak assembly or
included a driver such as a closed coupled electric explosion proof motor. Please verify which driver
is on your pump to know which sections of this document pertain to you.
PUMPAK ASSEMBLY (SIZE 30 ONLY) priming at initial start-up.
1. Loosen the drive sleeve clamp.
2. Slide the pump onto the driver by hand.
After start up check for leaks anywhere on
This should not require extreme force. the pump or pluming, and tighten any bolts
3. Install and tighten fasteners (4 screws) or nuts as necessary.
into the pump adaptor securing the driver.
4. Tighten drive sleeve clamp nuts to 20-26 ft. lbs.
If pump fails to prime or stops pumping,
5. Remove the metal shim strap that spaces check for the following possible causes:
the impeller by pulling it out of the discharge.
6. Rotate the shaft ensuring that the pump
1. No liquid in the pump housing
rotates freely before putting into service. 2. Air leak in the suction line due to loose
connections or pin holes in the hose.
BEARING HOUSING MOUNTING 3. Collapsed suction line or clogged strainer
The bearing housing must be above the pump in 4. Seal worn and leaked air.
any non horizontal application to prevent bearing 5. Worn impeller - too much clearance
damage due to liquid leakage. The pedestal or between impeller and wear plate.
foot mounted pumps, when provided with a driver 6. Pump not running fast enough.
and a coupling are mounted on a steel base plate. 7. Suction lift is too high.
Recheck after unit has been set in place. 8. Trying to prime against too high a
discharge head.
INSTALLATION
DISASSEMBLY
For optimum performance, place pump as close
to liquid source as possible to reduce suction lift
Disconnect power to prevent accidentally
to a minimum. For best results, pump should be starting. Disconnect lines and drain pump
installed not more than 15 feet above the liquid housing.
supply. Set the unit on solid footing and as nearly
level as possible.
MAINTENANCE
Pipe or hose of the same size as flanges provided Use the exploded parts view with these
should be used. Reinforced suction hose is instructions and note recommended
recommended because it provides greater replacement parts for the pump.
flexibility and prevents collapsing due to vacuum
in the suction line when pump is in operation.
Disconnect and remove the pump end from
Suction line should be as short as possible to keep the driver. Remove and replace the suction
friction loss at a minimum. Use pipe sealant on all and discharge gasket. Tighten the inlet and
connections and make certain that all fittings are discharge flange to 24-ft lbs. Remove nuts
tight, particularly on the suction line where an air from the adaptor and disassemble the
leak can prevent priming or reduce pump capacity. rotating assembly from the housing. Inspect
the wear plate for abrasive wear and replace
OPERATION if necessary using new screws, gaskets
and acorn nuts. Remove the seal seat
This petroleum pump is a self-priming centrifugal from the adaptor and discard. Impellers
pump and only requires priming prior to its initial are threaded onto a drive sleeve and
start. The pump will retain sufficient liquid for self- secured by a jam nut.
priming thereaftyer. If the pump has a discharge
valve it must be fully open to expel air during
PETROLEUM SELF-PRIMING CENTRIFUGAL PUMPS
INSTRUCTION BULLETIN