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To replace a failed seal, you must disassemble the pump.
1
Remove the impeller nut.
Insert a screwdriver in one of the impeller waterway pas-
sages and back off the impeller nut.
2
Remove the impeller by inserting a screw-
driver in the slot of the motor shaft. Unscrew the impeller
while holding the shaft against the rotation.
3
Remove the seal, gasket case, adapter and
flinger.
Pump motor
Flinger*
Pump adapter
Gasket, case*
4
Clean the gasket and flange faces, seal seat
cavity and shaft. The shaft shoulder that fits against the
impeller must be clean.
5
Replace the flinger.
Lubricate the seal seat cavity of the adapter and the
flinger with soapy water solution before pressing the
flinger squarely into the cavity. Do not chip or scratch the
lapped seat face.
6
Remount the adapter to the motor, making
sure the motor shaft does not dislocate or chip the seat of
the seal.
7
Replace the remaining seal components.
Apply a soapy water solution to the motor shaft and the
rubber bellows of the rotating seal. Be sure the rotating
seal face stays in the holding collar during installation.
Do not chip or scratch the lapped seat faces.
8
Reassemble the remaining components, hold-
ing the shaft against rotation. Remove any burrs caused
by the screwdriver on the impeller.
9
Reattach the pump to the volute case.
Replace any damaged gasket or O-ring between the pump
assembly and volute case. Check for free rotation after
assembly is completed.
UGH025-0504
*
Indicates Parts Supplied
in the Seal Repair Kit
Seal*
Impeller
D washer*
Impeller nut*
Thermolator TW Series
D
ISASSEMBLING
A
AND
SSEMBLING
3
/
- 2
P
HP
4
NOTE:
Before restarting,
close all drain openings using
sealant on the threads and
refill the unit with fluid. Do not
start the the pump when the
unit is dry.
T
ROUBLESHOOTING
UMPS
6-31
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