Product Manual
7
• Remove switch bracket mounting screw and gently pull
switch from switch cavity. (Figure 16)
NOTE: Switch shown is for models M-150S and M-180S.
Model M-240S switch does not require a jumper wire
and circuit breaker.
•
Remove the red wires from the terminals on the back of
the switch.
• Remove the remaining wire on motor protector then remove
the motor protector from switch cavity.
• Install new motor protector by reversing above proce-
dure.
NOTE: Make sure the O-ring is seated properly before tighten-
ing the switch coverplate.
Replace Switch Lever or
Switch Lever Shaft O-Ring
• Turn off the pump and disconnect from power.
• Remove the switch coverplate from the pump housing.
• Remove the screw connecting the switch cam to the
coverplate.
• Remove the cam and switch lever.
• Replace the switch lever or switch lever shaft O-ring as
needed.
• Reassemble by reversing the above procedure. Make
sure the O-ring is seated properly before tightening the
coverplate.
Replace Motor Shaft Seal
• Turn the pump OFF and disconnect from power.
• Remove the gear coverplate, gears, and drive key as
described in Gear Replacement instructions.
• Remove the motor from the pump housing.
• Remove the motor shaft seal by prying out with a small
screwdriver. (Figure 17)
• Lubricate the gear shaft with WD-40 or a similar pene-
trating oil.
• Press a new motor shaft seal evenly in the pump housing
until seated. Lubricate the seal with a lightweight motor
oil.
• Gently slide the shaft through the seal until the motor is
flush against the pump housing.
• Tighten the motor to the pump housing. Check for proper
installation by working a .0015 feeler gauge around the
motor flange. The gauge should not fit between the flange
and the housing.
• Install the gears and drive key as described in Gear Re-
placement instructions.
Replace Motor
In order to preserve the UL Listing or CSA Certification for
pump safety, return the entire pump to the factory for motor
repair or replacement. For products serviced outside the fac-
tory, the UL and CSA nameplates must be defaced to indicate
the equipment may no longer meet the requirements for UL
Listing or CSA Certification. This does not apply to products
serviced outside the factory under the UL program for Rebuilt
Motors for Use in Hazardous Locations and the CSA rebuild
program.
Figure 16
Figure 17
Back of Pump