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DISASSEMBLY PROCEDURE
5. How to remove water pump/ pump valve
Close the 2 pump valves (OFF) before removing the water
pump, and open the valves (ON) after reinstalling the water
pump.
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Remove the control box cover. (Refer to Procedure 3.)
(3) Disconnect the CNP1 connector, the earth cable, and the
CNPWM connector in the control box. (Photo 5-1)
(4) Release the water pump lead wire from the 2 cable
clamps, the cable strap, the 3 coated clamps and feed
the lead wire out the control box without putting strain on
the CNP1 connector. (Photo 5-1)
(5) Swing the control box to the front. (Refer to Procedure 4.)
(6) Remove the pump support top by removing the 2 screws
holding it to the pump support under (Photo 5-2).
Note: To avoid dropping of the pump support top, hold it
by hand when removing the last screw, .
(7) Close (OFF) the 2 pump valves and remove the G1-1/2"
nuts using two spanners: one to hold the pump and the
other to turn the individual nuts.
Remove the water pump by cutting the band fixing the
pump to the pump support under. (Photos 5-2)
* When either of the pump valve handles is stiff, remove
the handle and turn the vertical stem 90 degrees
clockwise mainly by using a spanner. (Photo 5-4)
* Set the water pump in the orientation of the arrow printed
on the water pump and in the way that the terminal box
faces to the front. (Photo 5-2)
* When reinstalling the G1-1/2" nuts, use new G1-1/2"
gaskets. (Photo 5-3)
(8) Remove the pump valves by removing the G1" nuts
using two spanners: one to hold the pump and the other
to turn each G1" nut . (Photo 5-2)
* When reinstalling the G1" nuts, use new G1" gaskets.
* When either of the pump valve handles is stiff, remove
the handle and turn the vertical stem 90 degrees
clockwise mainly by using a spanner. (Photo 5-4)
* When reinstalling the valves, place the handles to the
right hand side of the valves.
Note: Skip Steps (3) and (4) above when replacing the pump
valves only.
When replacing both the water pump and the pump
valves, skip Step (7) above.
OCH532A
Photo 5-1
Water pump connector (CNP1)
Lead
wire
Cable
clamps
CNPWM
connector
Cable
strap
Coated
clamp
Photo 5-2
Gasket (G1")
Nut (G1")
Nut
(G1-1/2")
Screw
Pump
support
top
Nut (G1-1/2")
Nut (G1")
Photo 5-3
Gasket G1-1/2"
71
PHOTOS
Earth cable
Coated clamps
Pump valve
Water pump
Terminal box
Pump valve
Gasket (G1")
Photo 5-4
Pump valve
Stem
Screw
Band
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