18
Seal Replacement/Maintenance
Warning: Make certain that the system is disconnected from the power
source in compliance with all local and national codes before attempting
to service or remove any components. Never run the pump when dry.
Maintenance:
Inspection: Pump should be periodically checked for proper operation. If the system has changed
or if the pump is operating noisily or erratically, then the pump should be removed and examined.
It should be repaired and parts replaced as necessary.
Cleaning: Remove oil, dust, dirt, water, chemicals from exterior of pump and motor. Blow out
interior of open motors with clean compressed air at low pressure. Regularly drain moisture from
TEFC motors.
Draining: If the pump is located in an area subject to freezing temperatures, the pump must be
drained when not in operation or add sufficient antifreeze.
Seal Replacement:
Disassembly:
Turn off power.
Close suction and discharge valves (if equipped).
Drain pump.
Remove bolts holding down pump to mounting plate.
Remove pump from system.
Remove case.
Insert a screwdriver in one of the impeller waterway passages and back off the impeller
retaining assembly with a socket wrench.
Remove impeller from shaft, being careful not to lose the impeller key, spring and gasket. If
impeller is difficult to remove, it may be necessary to use a bearing puller to remove.
Pry off rotating member of mechanical seal from motor shaft by using two (2) screwdrivers.
Be careful not to damage the pump cover.
Remove pump cover from cast iron disc. (There is no hardware used to attach cover to
disc.) Place cover on a flat surface with convex side down. Push out stationary member of
mechanical seal. It is not necessary to remove the cast iron disc from the motor to replace
the seal.
Inspect shaft sleeve. If damage or worn, remove from shaft and replace.
