Product Manual

c. From inside the housing, use a small screwdriver to
push the poppet and spring through the top outlet
port. (Figure 11)
d. Wipe the poppet and gear cavities with a clean cloth.
e. Replace the poppet, O-ring, and spring, as necessary.
NOTE: Replace O-ring if damaged, swollen, or loose-fitting.
• To assemble, place the spring and poppet into the poppet
cavity through the top outlet port. Compress the poppet
into the housing until the poppet appears in the lower
chamber. (see Figure 10) Coat the O-ring lightly with grease
and slip over the poppet head. Make sure the O-ring is
well-seated.
• Push on the poppet through the top outlet port to make
sure it moves freely.
• Install the pipe plug again.
• Replace the gears and drive key. Make sure gears turn
freely with the key removed.
• Make sure the gear coverplate O-ring is in place. Tighten
the coverplate to the pump housing.
Replace Power Switch
• Turn the pump OFF and disconnect from power.
• Remove the switch coverplate from the pump housing.
(Figure 12)
• Remove the torx head screw, then remove the switch
assembly. (Figure 13)
• Models M-150S and M-180S: Remove one pump wire
from the back of the switch and one wire from the circuit
protector.
• Model M-240S only: Remove both pump wires from the
back of the switch.
• Install a new switch by reversing the above procedure.
Insert the switch assembly into the pump cavity. Place
the red wire between the circuit breaker and the wall of
the pump. Make sure the O-ring is seated properly before
tightening the switch coverplate.
NOTE: For the proper operation of the switch lever and cam,
attach the mounting plate to the switch with a clearance
of 0.175 or about 3/16 inch. (Figure 14)
Replace Motor Protector
NOTE: The pump can remain on the tank during motor protec-
tor replacement.
• Turn off the pump and disconnect from power.
• Remove the switch coverplate from the pump housing.
(Figure 15)
6
Figure 10
O-ring Groove
➤
Poppet O-ring
➤
Spring
➤
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15