Atlas Copco MIDI F/R 15C-BS Guia De Inicio Rapido página 3

Dismantling for cleaning of the regulator unit
Note – The dismantling procedure described below is valid for an
uninstalled filter/regulator. When a filter/regulator which is installed in
the compressed air line is to be dismantled, the air line must first be
vented.
– Pull the setting knob (2) out and turn it counter-clockwise as far as
it goes.
– Carefully, simultaneously, bend out a little the upper end of the
three tabs on ring (8) and lift off the setting knob.
– Grip, e.g. in a vice, the outer end of the bonnet (5) firmly and turn it
counter-clockwise. Remove the complete housing.
– Remove the spring (11) and take out the complete diaphragm (13)
and support ring (12). Note the side of the support ring which is
facing the diaphragm. Check the condition of the rubber diaphragm
(15). Replace if worn.
– Pull the tab on the lock ring (43) in the arrow direction and turn the
bayonet ring (44) counter-clockwise to stop.
– Pull down the complete bowl.
– Turn the separator disk (26) 90° counter-clockwise. Pull out the
disk and the filter element (27/28).
– Remove the splash shield (25). Turn counter-clockwise.
– Take care of the spring (29) located inside the splash shield.
– Take out the complete regulating valve (19). Check the rubber seat
on the valve. Replace valve if seat is damaged. Check the O-ring
(21). Replace if damaged or deformed.
– Check the valve seat inside the filter/regulator housing.
– Remove the O-rings (22) and (30). Replace if they are damaged or
deformed.
Assembling after cleaning of the regulator unit
Note – In assembling, conditions of scrupulous cleanliness must be
observed.
– Grease and install the O-rings (22) and (30) in the housing.
– Grease the regulating valve pin (notice the play pin relative to valve
body) as well as the outer cylindrical part of the regulating valve
and its O-ring (21).
– Insert the complete regulating valve (19) in the housing.
– Locate the spring (18) on the regulating valve.
– Screw in the splash shield. Turn clockwise. Use suitable tool in
centre part to grip and tighten.
– Push in the filter unit. Position the separator disk and turn it 90°
clockwise.
– Push the bowl and the bayonet ring into the housing with the
bayonet tabs fitting in corresponding recesses. Turn the bayonet
ring clockwise until the arrow marked tab on lock ring (43) snaps
into locked position.
– Check that the bayonet ring is locked by trying to turn it
counter-clockwise.
– Check the seat for the diaphragm assembly (13) in the housing.
– Fit the diaphragm assembly into the housing.
– Push the valve pin and the diaphragm a couple of times to make
sure that the regulating valve is operating at full stroke (approx. 3
mm).
– Fit the support ring (12). Position so the internal radius will face the
diaphragm.
– Position the spring (11) on top of the diaphragm assembly.
– Turn the square shaped spindle (4) on top of the complete bonnet
(3) counter-clockwise to stop.
– Screw the complete bonnet (3) 1-2 turns into the regulator housing.
– Turn the square shaped spindle 3-4 turns clockwise to centre the
diaphragm relative to the stem on regulating valve (19).
– Turn the setting screw (4) counter-clockwise back to stop.
– Screw in the complete bonnet (3) clockwise and tighten it firmly.
– Push on the setting knob (2) until the tabs on ring (8) locks the
knob.
Installation of filter/regulator after overhaul
– Install the filter/regulator and pressurize the air line.
– Turn the setting knob (2) to build up some pressure. Turn the knob
to and fro to make sure that the pressure follows the setting.
Atlas Copco Tools - No. 9836 1551 00
ENGLISH - Instructions
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