Impeller 1 - Pioneer ES Series Operation & Maintenance Manual

Secure the outboard bearing on the shaft with the bearing retaining ring. Slide the shaft and
assembled bearings into the bearing housing until the retaining ring contacts the bearing
housing.
SEAL INSTALLATION
A new seal assembly should be installed anytime the old
seal is removed. The wear pattern on the old seal can cause
premature failure if reused. Refer to figures 1 and 2.
Thoroughly clean the shaft where the mechanical seal will
be installed, and the seat of the seal housing. Place the
sleeve o-ring over the shaft, past the threads and up against
the shaft shoulder. Lubricate the stationary seat bore and
stationary seat o-ring with P-80, 30 wt. motor oil, or liquid
dish detergent and a little water. DO NOT USE GREASE
OR SILICONE LUBRICANTS.
Remove the plastic, u-shaped seal-setting spacer from the
cartridge seal assembly.
Carefully slide the cartridge seal assembly over the shaft, with the stationary seat towards the
bore. By hand only, carefully press on the flanged end of the cartridge seal sleeve until the
stationary seat bottoms in the stationary seat bore. Install impeller according to instructions.
IMPELLER
The shaft and impeller threads must be completely clean before re-installing the impeller.
Apply anti-seize compound to the external shaft threads. Do not use anti-seize compounds on
the lockscrew threads! Screw the impeller onto the shaft until tight. A clearance of .025 to
.035 between the impeller and the seal plate is recommended for optimum pump efficiency.
Measure this clearance between the impeller and the
rotating assembly with the rotating assembly sitting
on the impeller with the shaft oriented vertically.
Add or remove impeller adjusting shims as required
to achieve the correct clearance. Apply Loctite
2760, or equivalent thread locking compound, to
impeller screw and install impeller washer and
screw.
Torque the impeller screw to a minimum of 175 foot
pounds, maximum of 235 foot pounds. Do not allow
the shaft to rotate while tightening the lockscrew
INSPECTION COVER AND WEAR PLATE
Re-grease o-ring when installing and use 2760 Loctite® (red), or equivalent, on the wear plate
studs. Installation is the reverse of removal.
ROTATING ASSEMBLY
Re-grease o-ring and install rotating assembly into volute. Installation is the reverse of removal.
Upon installation, the clearance between the suction cover and impeller needs to be verified.
After sliding the rotating assembly back into the volute, evenly tighten rotating element bearing
18