How To Remove The Manometer/Pressure Relief Valve/Air Vent (Automatic) - Mitsubishi Electric EHSE-YM9EC Service Manual

DISASSEMBLY PROCEDURE
10. How to remove the manometer/pressure relief valve/air
vent (automatic)
(1) Remove the front panel. (Refer to Procedure 1.)
(2) S wing the control box to the front. (Refer to Procedure 4.)
<Manometer>
(3) R emove the screw on the manometer. (Photo 10-1)
(4) H old the sides of the manometer cover, disengage the
claws, and remove the manometer with cover. (Photo
10-1)
(5) R emove the G1/4" nut and feed the capillary tube
throughout the hydrobox.
• When reinstalling the G1/4" nut, use a new G1/4"
gasket. (Photo 10-2)
(6) R emove the manometer from the manometer cover while
pressing on the claws. (Photo 10-3)
• When reinstalling the manometer assembly on the
hydrobox beware not to put strain on the root of the
capillary tube as the capillary tube is easy to break at
the root.
<Pressure relief valve>
(3) R emove the field piping from the pressure relief valve.
(4) R emove the manometer by removing the G1/4" nut.
• When reinstalling the G1/4" nut, use a new G1/4"
gasket. (Photo 10-2)
(5) R emove the pressure relief valve with a flare joint using
2 wrenches: one to hold the flare joint and the other to
turn the flare nut. (Photo 10-2)
(6) R emove the pressure relief valve using 2 wrenches: one
to hold the flare joint and the other to turn the pressure
relief valve. (Photo 10-4)
(7) E liminate locktite on the thread surfaces using remover.
(Photo 10-4)
• Before reinstallation, apply locktite over the thread
surface on the pressure relief valve.
• For more details about the locktite and the remover,
refer to Page 71.
OCH590B
PHOTOS
Photo 10-1
Manometer
Manometer
cover
Claw
Photo 10-2
Flare nut
Capillary tube
Photo 10-3
Manometer
Claw
Root
Photo 10-4
Pressure relief valve
66
Claw
Screw
Gasket (G1/4") Nut (G1/4")
Pressure relief valve
Capillary
tube
Claw
Flare joint
Threads for application
of locktite