Mitsubishi Electric EHSC-MEC Service Manual page 87

DISASSEMBLY PROCEDURE
10. How to remove the manometer / pressure relief valve / air
vent (automatic)
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Swing the control box to the front. (Refer to Procedure 4.)
<Manometer>
(3) Remove the screw on the manometer. (Photo 10-1)
(4) Hold the sides of the manometer cover, disengage the
claws, and remove the manometer with cover. (Photo
10-1)
(5) Remove 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) Remove 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> (3bar)
(3) Remove the field piping from the pressure relief valve.
(4) Remove the manometer by removing the G1/4" nut.
• When reinstalling the G1/4" nut, use a new G1/4"
gasket. (Photo 10-2)
(5) Remove the pressure relief valve with a flare joint using
2 spanners: one to hold the flare joint and the other to
turn the flare nut. (Photo 10-2)
(6) Remove the pressure relief valve using 2 spanners: one
to hold the flare joint and the other to turn the pressure
relief valve. (Photo 10-4)
(7) Eliminate loctite on the thread surfaces using remover.
(Photo 10-4)
• Before reinstallation, apply loctite over the thread
surface on the pressure relief valve.
• For more details about the loctite and the remover,
refer to Page 91.
• Suitable drain pipe work should be attached to
pressure relief valve(3bar).
• Make sure to carry out check (turn the cap) on
pressure relief valve(3bar).
OCH571D
PHOTOS/ FIGURES
Photo 10-1
Manometer
Manometer
cover
Photo 10-2
Flare nut
Photo 10-3
Manometer
Claw
Root
Photo 10-4
Pressure relief valve
87
Claw
Claw
Gasket (G1/4") Nut (G1/4")
Capillary tube Pressure relief valve (3bar)
Flare joint
Threads for application
of loctite
Screw
Capillary
tube
Claw