MP Pumps PETROLEUM SELF-PRIMING 5, 8, 10, 15 INSTRUCTION - Manual (Page 3)

When replacing wear plate, be sure to use
new gaskets under acorn nuts to seal
against air leaking in on suction side
during priming cycle.
and require replacement, lubricate the impeller
being pumped and slide parts off sleeve.
parts over carefully for wear or damage. When
INSPECTION
Hold firmly and unthread impeller by turning
counterclockwise - left hand. Replace with a
new impeller. Be sure seal spring fits over hub
CAUTION
Use two pry bars or large screwdrivers
inspect the carbon washer. If nicked or worn,
diagonally across from each other between
adapter and end of drive sleeve. Pry the sleeve
off the drive shaft.
seat by using wooden end of a screw driver or
replace it with a new one. Inspect seal seat (still
housing.
similar tool. ( SEE PARAGRAPH REFERRING
TO REASSEMBLY ).
surface, with impeller side down. Press out seal
four hex nuts and washers. Place adapter on flat
FIGURE 1
TO REMOVE WEAR PLATE
After pump housing has been removed from
the adapter, inspect the wear plate. If wear
plate is badly worn, it should be replaced. To
remove wear plate, loosen and remove acorn
nuts and gaskets on the outside of the pump
SEAL ASSEMBLY (See Fig. 1)
TO REPLACE IMPELLER
Before removing the seal from the impeller,
in the pump adapter). If no nicks, scratches or
cracks appear and the surface is clean and
smooth, there is no need to replace it. If replace-
ment is necessary, remove adapter by removing
(Part 3) for wear which would necessitate
On the threaded sleeve of this pump it is not
necessary to remove the seal. Clamp the drive
sleeve using caution not to mar the seal surface.
on back of impeller.
TO REMOVE ADAPTER
Remove the four nuts and lock washers.
Loosen and remove adapter.
TO INSPECT SELF-LUBRICATED
press out old seat and ring, and proceed as
outlined in paragraph on MOUNTING
ADAPTER.
replacement.
Inspect lapped sealing face of floating seat
(Part 4) in adapter housing counterbore for
scuffing or cracks. If necessary to replace,
After the impeller and drive sleeve have
After pump has been disassembled, check all
ordering parts for your pump, be sure to specify
If spring &/or bellows (Part 1 & 2) are damaged
been removed from the drive shaft, inspect
the lapped sealing face of carbon washer
seal seat and press (do not drive) the assembly
into the adapter counterbore, seating it firmly
MOUNTING ADAPTER
REASSEMBLY
the model and serial numbers shown on the
name plate.
Clean and lubricate the synthetic member on
Before mounting adapter, thoroughly clean the
counterbore.
and squarely.
CAUTION
face.
particular care not to scratch the lapped
In handling, avoid dropping seat and take
sleeve with a suitable lubricant for the fluid