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4.3 PUMP WET END ASSEMBLY
Pumps described in this manual, to the 4x3 in size, have two-piece metal, urethane or elastomer liners.
Liner configuration is independent of Bearing Assembly size. Metal and Elastomer liners can be retrofitted into
the same wet ends and a mix of Metal and Elastomer liners is also possible where mixing the components will
extend component life.
4.3.1 TWO PIECE RUBBER LINERS-Ref Fig 9
Figure 9-
Assembling Two Piece Liners
4.3.1.1 ASSEMBLE FRAME PLATE LINER
I.
Fit and tighten Frame Plate Liner Studs to tapped bosses in Frame Plate Liner. If Studs are not square to
the face of the Liner, screw a nut on the thread, and straighten by tapping lightly with a hammer.
II.
Lift Liner in position, line up the Studs with holes in the Frame Plate, then push into Frame Plate. Fit
Nuts to Studs, then finger tighten plus a quarter of a turn. These studs are only required to hold the part
in place and prevent collapse if the pump is under vacuum
. DO NOT OVER TIGHTEN
.
III.
Place the impeller, suction down on a flat surface, check to ensure the thread is clean and free of burrs,
using gloves liberally apply anti-seize compound to thread, and screw Impeller to Shaft.
IV.
Fit Shaft Key in Shaft keyway, and using a shaft locking device (Shaft Wrench recommended) turn the
Impeller with a bar between vanes until it locks firmly to the shaft, but do not over tighten. Ensure that
the various O-Rings on the Shaft are not damaged, and are in their correct O ring seat.