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DISASSEMBLY CONT'D
Review all safety information and follow the instructions in this manual, as well as, all tags,
labels and decals attached to the pump or related equipment.
Under normal conditions this pump is designed to run maintenance free, because of its rugged
construction, for extended periods of time. However, all centrifugal pumps contain wear parts
that will gradually deteriorate, affecting pump performance. This pump does contain wear
parts and these parts should be replaced as required to maintain optimum performance.
General maintenance can be performed without removing the pump from the driver. The
following instructions assume a complete disassembly of the pump is required.
SUCTION COVER AND WEAR PLATE
Before attempting to service the pump allow unit to cool and then remove the casing drain
plug, and drain the pump. Once drained, clean the plug and reinstall in suction cover. Turn the
T-handle screw on the cover clamp bar to loosen the cover clamp bar, and remove the cover
clamp bar. The inspection cover / wear plate assembly can now be removed from the
suction–side of the pump case. Inspect the wear plate and replace if badly worn or scored. To
remove the wear plate, loosen and remove the two nuts and washers from the wear plate studs.
Inspect the suction cover o-ring and replace if necessary.
ROTATING ASSEMBLY
The power source must be removed prior to removing the rotating assembly. Drain the oil in
the seal plate cavity and seal oil reservoir by removing the seal plate drain plug. Clean and
replace the drain plug after draining seal cavity of oil.
Remove the inspection cover and wear plate from the suction side of the pump. Immobilize the
impeller by wedging a block of wood between the impeller vanes and the pump casing. Attach
a strap wrench to the drive-end of the shaft or to the shaft-end coupling half With the impeller
rotation still blocked pry in a counter-clockwise direction (when facing drive end of shaft) until
the impeller becomes loose. Remove the wrench and the four (4) bolts on the drive end of the
bearing housing.
SUCTION CHECK VALVE
To service the suction flapper valve assembly, remove the suction flapper pin (model PT2.0).
Remove the four capscrews and washers or four nuts (depending on model), and pull the
suction piece off the pump case. The suction flapper valve and suction flapper retainer can
now be disassembled (PT2.0). For the PT1.5 the suction flapper valve is integral with the
suction piece gasket and does not require further disassembly for replacement. If the suction
flapper valve is damaged in any way, it should be replaced. Replacement is simply the reverse
of disassembly.
IMPELLER
After loosening impeller per previous instructions, it can be unscrewed by hand and removed
from the pump case.
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