Impeller; Mechanical Seal - Pioneer ES Series Operation & Maintenance Manual

(2) jackscrews to remove the rotating assembly from the volute. Separate the rotating assembly
by pulling straight away from the pump casing.

IMPELLER

With the rotating assembly removed from the pump casing, remove the impeller lock screw and
unscrew the impeller from the shaft. The impeller was installed at the factory using Loctite®
and so may be fairly difficult to unscrew. A propane torch can be used to ease loosening the
screw if necessary. Use the impeller removal tool to fix the shaft from rotating, and use a metal
bar or piece of wood to rotate the impeller counter-clockwise until it is free of the shaft. It may
be necessary to pound the bar with a hammer to loosen the impeller. Inspect the impeller and
replace as necessary. Use caution when removing the impeller.

MECHANICAL SEAL

With the rotating assembly out of the
volute and the impeller removed, slide
the shaft sleeve and rotating portion of
the seal off of the shaft as one unit (3" to
8" pumps). On the P10 there is no sleeve
or sleeve o-ring. Drain the oil in the seal
cavity by removing the seal cavity drain
plug, located on the bearing housing's
bottom front boss (figure 4). Clean and
replace the drain plug after draining seal
cavity of oil. Remove the seal housing
from the bearing frame, and place it, face
down, on a flat surface. With a suitable tool press on the backside of the stationary seat until it
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