Disassembly
Impeller and Volute -
Disconnect
power. Remove hex nuts (26) and
vertically lift motor housing and seal
plate assembly from volute (34).
Clean out volute (34) if necessary.
Inspect gasket (32) and replace if cut
or damaged. Clean and examine
impeller (29), for pitting or wear and
replace if required. To remove
impeller (29), remove cap screw (31)
and washer (30). With a wheel puller,
pull impeller straight of shaft and
remove square key (13).
Moisture Probes -
Drain oil from seal
chamber, if not already done.
Remove cap screws (9) and lifting
handle (8). Set unit upside down on
blocks to avoid damaging cables.
Remove socket head cap screws (12)
and lift seal plate (20), with seal’s (19)
stationary, vertically from bearing
housing (16),
do not
damage seal.
Check moisture sensor probes (38)
for damage, replace by removing
screws (39) and disconnecting wires
(37). Then remove probes (38) from
bearing housing (16).
Diaphragm -
with seal plate (20)
removed, examine diaphragm (21)
for ruptures or crackes. Replace
diaphragm by removing capscrews
(23) and plate (22). Clean vent holes
in seal plate (20).
Shaft Seal -
Remove outboard
rotating member of seal (19), spring
and inboard rotating member from
shaft. Examine all seal parts.
Inspect seal for signs of uneven wear
pattern on stationary members, chips
and scratches on either seal face.
DO
NOT interchange seal components,
replace the entire shaft seal
. If
replacing seal, remove stationary by
prying out with lat screwdrive.
Motor and Bearings -
Remove
volute, impeller, seal plate and seal as
previously stated and drain oil from
motor housing (3). Position unit
upright, using blocks to avoid resting
unit on shaft. Remove cap screws (6)
o-ring (5) and conduit box assembly
(4) from motor housing (3). Note
connections and then remove cable
lead wires from motor lead wires and
moisture and temperature sensor
wires from control cable by removing
connectors. Remove cap screws (12)
and vertically lift the motor housing
(3) from bearing housing (16).
Replace square ring (15) if damaged
or cut. Remove the upper motor bolts
and lift upper end bell from motor
(1). Remove wave washer. Remove
upper bearing (2) with a wheel puller
if damaged or worn.
Vertically lift stator (1) from
rotor/shaft. Inspect windings for
shorts and resistance. Test the
temperature sensors by checking for
continuity between the black and
white wires. If defective contact
factory or motor service station. Pull
motor rotor/shaft with bearing (14)
from bearing housing (16). Remove
bearing (14) with a wheel puller if
worn or damaged. If rotor or stator
windings are defective, replace the
complete motor.
Reassembly
Bearings -
Replace bearings, being
careful not to damage the rotor or
shaft. If equipped, fiill notch should
face the rotor core for both upper
and lower bearings.
Apply adhesive compound to the
shaft and press bearing (14) onto
shaft, position squarely onto the
shaft applying force to the inner race
of bearing only, until bearing seats on
shoulder of the shaft. In the same
manner, assemble upper bearing (2)
to shaft.
Motor -
Slide rotor with bearing (14)
into bearing housing (16) until
bearing seats on the bottom. Position
motor housing and stator into pilot,
install wave washers in upper end
bell.
IMPORTANT! Special wave washers
in upper motor housing are required
to compensate for shaft expansion.
These washers must be properly
reinstalled to give the required
constant down force on the motor
shaft.
Position upper motor end bell
aligning holes and thread cap screws
into bearing housing (16) and torque
to 16 ft/lbs. Place all motor leads
above the motor. Position square ring
(15) on bearing housing (16) and
lower housing (3) over motor and
into pilot, aligning handle so that it is
parallel to motor end bell reliefs.
Apply thread locking compound to
threads on cap screws (12) and place
into holes and torque to 24 ft/lbs.
Seal/Diaphragm -
(See Figure 3)
Clean and oil seal cavities in bearing
housing (16) and seal plate (20).
Lightly oil
(Do not use grease)
outer
surface of inboard and outboard
stationary members of seal (19). Press
inboard stationary member firmly
into bearing housing (16) and
outboard stationary into diaphragm
plate (20), using a seal pusher tool.
Nothing but the seal pusher tool is to
come in contact with seal face.
IMPORTANT! - All parts
must be clean before
reassembly.
Handle seal parts with
extreme care. DO NOT
damage lapped surfaces.
06
Service
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