7
Sewage Pumps
Model: SWH300/SWH500 & SWHD300/SWHD500
Installation and Service
Volute -
Remove socket head cap screws from volute.
Impeller -
Remove impeller by turning counter-clockwise
careful application of heat may be necessary. Do Not
store pump without impeller in place.
Seal-
Handle seal parts with care. Remove rotating mem-
ber from shaft. Remove pressed-in spring component
from seal plate. Examine all seal parts. Inspect contact
faces for signs of uneven wear tracks on stationary face,
chips and scratches on either seal face. DO NOT inter-
change seal components, replace the
entire shaft seal if necessary.
Seal Plate -
Remove cap screws from seal plate. Remove
seal plate and o-ring.
Bearings -
Using a bearing puller or arbor press remove
bearing from shaft. Remove upper motor bearing from
shaft with a bearing puller.
IMPORTANT! - All parts must be clean before
reassembly. Handle seal parts with extreme
care. DO NOT damage lapped surfaces.
REASSEMBLY
Bearing -
Be careful not to damage the rotor shaft when
replacing bearing. Using an arbor press, hold the rotor
and press the upper bearing on the rotor shaft,
applying force to the inner race of the bearing only.
In the same manner replace lower bearing (49) onto rotor
shaft.
Seal Plate -
Lubricate and set o-ring in bottom of seal
plate. Place seal plate over shaft, being sure o-ring is not
twisted and in the groove. Place four capscrews through
holes in motor housing and into seal plate and torque to
6.5 ft/lbs.
Outer Seal -
Clean and oil stationary seal cavity in seal
plate. Slide seal guide tool over motor shaft. Lightly oil
(Do not use grease
) outer surface of seal’s stationary
member.
Press stationary firmly into seal plate using a seal pusher
tool. Be sure the stationary member is in straight. Noth-
ing but the seal tool is to come in contact with seal face.
IMPORTANT ! Do not hammer on the seal
pusher. It will damage the seal face.
With lapped surface of rotating member facing inward
toward stationary, slide rotating member and onto shaft,
until lapped faces of stationary and rotating seal are
together.
Impeller -
Place impeller on motor shaft by turning clock-
wise. Blue thread locking compound is recommended.
Volute -
Place volute on seal plate. Place socket head cap
screws through volute and into seal plate Then torque
evenly to 11 ft/lbs.