Disassembling The Pump - WDM GE Series Operation Manual

Operation Manual.
6.

Disassembling the pump

Below are outlined instructions to completely disassemble the pump.
In order to perform maintenance, only disassemble as far as required.
•
Turn off power.
•
Drain system, including. flushing, if necessary.
•
Closed coupled units and remove bolts that hold down the
motor.
•
Remove casing bolts.
•
Remove back pull-out bearing frame assembly for casing.
•
Unscrew impeller nut.
rotation. It may be necessary to use a strap wrench around the impeller
or shaft to prevent rotation.
•
To remove the impeller from the shaft, use the appropriate
size gear puller aligned behind the impeller vanes..
•
Remove impeller key.
•
Remove the backplate bolts, backplate, and seal housing.
•
Place seal housing on flat surface and press out seal seat
(14A).
•
To replace the shaft sleeve, heat evenly to about 350°F in
order to loosen the Loctite and then twist the sleeve off.
•
Remove Slinger.
•
Remove grease seal.
•
Remove bearing house retaining ring.
•
Continue to press or tap on pump end of the bearing-shaft
assembly until one bearing is out..
•
Once one bearing is out, remove second retaining ring, and
then remove complete assembly from bearing housing.
•
Remove shaft retaining ring and press off bearings.
•
When pressing on new bearings, only press on the inner race
of the bearing
•
Reassemble frame in the reverse procedure used for
disassembly.
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CAUTION.
Do not insert screwdriver between impeller vanes to prevent