Repair and Maintenance Instructions
When it has been determined that the Controlair®
Valve requires repairs, the following general instruc-
tions are recommended.
Disassembly, Cleaning and Lubrication
Completely disassemble the Controlair valve.
Wash all metal parts in a non-flammable solvent.
Rinse each part thoroughly and blow dry with low
pressure air.
Inspect and clean the inlet filter Item #17 and both
gaskets Item #18. Be sure all passages in the body
and pipe bracket and sensing port orifice in top of the
diaphragm chamber are clean and unrestricted.
To remove cam set screw Item #40, use of an im-
pact wrench (set soft) will break it loose to remove
the cam and shaft from cam housing.
Examine all parts carefully. Replace all rubber
parts and all worn or damaged parts.
The use of re-
pair kits is recommended.
Reassemble
Refer to exploded Parts and Assembly Views.
Valves should always be reassembled using new
rubber parts.
Lubricate all metal to metal wear surfaces with
Lubriplate 107 Grease. Lubricate all the rubber parts,
except the diaphragm
with Dow Corning No. 55
Pneumatic Grease.
The exhaust valve and seat if not replaced should
be polished for minimum leakage using a 600 grit
lapping compound. Be sure to clean these parts prior
to installing in the valve.
Installing the cam set screw Item #40. The cam set
screw must be fully seated into the drill point location
on the cam shaft Item #36. When installing set screw
Item #40 use a thread locker like Loctite TL242.
Installing the handle (Item #43), seat the handle
into the yoke, Item #42 before installing the nut, Item
#44.
Do not over torque the cap nut, Item #44.
Adjustments
There are 3 adjustments that can be made to the
H-2 Controlair Valves. The adjusting screw item #1
that varies the output pressure, reversing the handle
yoke item #42 can effect the degrees of handle travel
from 92 to 78 degrees and friction brake item #47
increases or decreases the force required to move
the control handle.
Graduated Output Pressure Adjustments
Adjusting screw Item #1 varies the maximum pres-
sure setting. Turning the adjusting screw in raises the
maximum
pressure. Turning the screw out decreases
the
maximum
pressure. The maximum control pres-
sure adjustment should not exceed the maximum
control pressure shown in the Identity Schedule for
that part number. (Control Springs are color coded).
The maximum output pressure rating can be
changed by changing the control spring Item #5.
With air supplied to the valve, move handle from
neutral to full travel position and hold. Adjust graduat-
ing valve screw Item #1 to obtain the maximum con-
trol pressure per Identity schedule. Move handle
back to neutral position and
note
delivery line is ex-
hausted to zero.
Special Preload Setting
This setting calls for a predetermined delivery pres-
sure.
Friction Brake Adjustment
The handle force of the H-2-FX, H-2-EFX and H-2-
EFS Controlair Valve can be varied by adjusting nut
Item #50 on the brake shoe holder Item #47. This
adjustment increases or decreases the force required
to move the handle in any position of the handle trav-
el.
Factory setting is 8 lbs (3.6 Kgs
)
This adjustment is normally made on the cam
housing portion before assembling to the control por-
tion.
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Repair and Maintenance Instructions
