Mitsubishi Electric EHSD-MED Service Manual page 64

DISASSEMBLY PROCEDURE
5. How to remove water pump/ pump valve
(5) <E*SE series>
Close (OFF) the pump valve and remove the G1-1/2"
nuts using 2 spanners: one to hold the G1-1/2" nut and
the other to turn the other side of G1-1/2" nut.
Remove the water pump by sliding it horizontally.
(Photo 5-5)
• When the pump valve handle is stiff, turn the handle
90 degrees clockwise mainly by using a spanner.
• When opening or closing the pump valve, ensure to do
so fully, not halfway.
• When reinstalling the G1-1/2" nuts, use new G1-1/2"
gaskets. (Photo 5-6)
• Set the water pump in the way that the die stamped
arrow facing down, and the terminal box facing to the
left. (Photo 5-5)
• Be sure to change the pump and the water pump lead
wire together.
• Be sure to wipe water around the surface of the pump
and the water pump lead wire thoroughly.
<E*PX series>
Close (OFF) the pump valve and remove the G1" nuts
using 2 spanners: one to hold the G1" nut and the other
to turn the other side of G1" nut.
Remove the water pump by sliding it vertically. (Photo
5-8)
• When the pump valve handle and the strainer valve
handle are stiff, turn the handle 90 degrees clockwise
mainly by using a spanner.
• When opening or closing the pump valve and the
strainer valve, ensure to do so fully, not halfway.
• When reinstalling the G1" nuts, use new G1" gaskets.
(Photo 5-3)
• Set the water pump in the way that the die stamped
arrow facing left, and the lead wire connectors facing
to the up. (Photo 5-8)
• Be sure to change the pump and the water pump lead
wire together.
• Be sure to wipe water around the surface of the pump
and the water pump lead wire thoroughly.
<Pump valve>
(6) Remove the 2 screws fixing the pump valve stay.
(Photos 5-2, 5-5 and 5-8)
(7) Remove the pump valve by detaching the quick con-
nection. (Photos 5-2, 5-5 and 5-8)
• When reinstalling the quick connection, use new
O-ring.
• When the pump valve handle is stiff, turn the handle
90 degrees clockwise mainly by using a spanner.
• When reinstalling the pump valve, place the handle to
the left hand side of the pump valve.
• When opening or closing the pump valve, ensure to do
so fully, not halfway.
• Reuse the removed pump valve stay and the pump
valve stay fixing screws. (Photos 5-4 and 5-7)
• Refer to Procedure 16 for how to attach and detach
the quick connection.
Note: Skip Steps (2) and (3) above when replacing the
pump valves only.
OCH712C
PHOTOS/ FIGURES
Photo 5-5 (E*SE series)
Gasket (G1-1/2")
Nut (G1-1/2")
Terminal box
Water pump
Gasket (G1-1/2")
Nut (G1-1/2")
Pump valve
Pump valve
stay
Photo 5-6 (E*SE series) Photo 5-7 (E*SE series)
Gasket (G1-1/2")
Photo 5-8 (E*PX series)
Gasket (G1") Nut (G1")
Water pump
Screws
Pump valve
Pump valve
stay
O-ring
Quick connection
64
Flow direction
Different diameter
Screws O-ring
quick connection
Strainer valve
Pump valve
Screws
stay
Lead wire connectors
Flow direction
Nut (G1")
Gasket (G1")