MAJOR REPAIR AND MAINTENANCE, ADJUSTMENTS
(continued)
Page 13
H
-
1 (light pedal) Adjustment (ref. Page 15 for
test set
-
up and page 10 for part references)
With the H
-
1 Controlair Valve pedal fully released,
turn the adjusting screw at the bottom of housing
clockwise until the delivery gauge begins to move
from
“0”
pressure setting. With pressure gauge
reading from
“0”
to 3 psi maximum, turn the ad-
justing screw one full turn counterclockwise.
Fully depress the pedal (14) and adjust the pedal
top screw (12) to obtain the maximum specified
pressure setting as per identity schedule, page 7,
release the pedal. Tighten lock nut (13). Depress
the pedal again and check to see that at full travel,
the specified pressure ± 3 psi is obtained. Release
the pedal.
(
H
-
1 Light Pedal) Controlair ® Valve
H
-
1
-
A Adjustment (ref. Page 15 for test set
-
up and pages 8 & 10 for part references)
4. Check delivered air pressure from valve. It
should be the pressure range indicated on
identity schedule, page 7, for the part number
valve.
5. Adjust bottom set screw (1) (adjustment C) to
obtain the pressure range rating of the control
spring in use. When using this adjustment to
obtain the rated maximum pressure setting,
always be sure the delivered pressure goes to
zero upon release of the pedal.
6. The inability to complete the above adjustments
on a repaired valve would indicate the following
possibilities:
Pedal, cam roller and/or eccentric pin is worn
past the point where step 2 can be completed.
Replace as necessary.
Incorrect control spring for the range desired
…
check the spring in use. Or the control spring
has taken some permanent set and should be
replaced.
Valve not mounted, or in use, on a flat surface.
Pedal pivot pinpoint and/or pin worn.
Inlet and exhaust valve assembly and/or
exhaust valve seat (items 13 & 8 on page 8 of
service bulletin) have been reseated and are out
of dimensional tolerance. It is recommended
that these units be fully replaced with new parts
when necessary.
1. Place valve with mounting feet firmly on a flat
surface, bolting the valve down if necessary.
2. Adjust eccentric pin (24), page 8, (adjustment A)
so that top of pedal rests about
1.75”
above the
flat surface as shown below.
3. Depress pedal to contact with the flat surface and
adjust the travel stop bolt (8), page 10, to contact
the body at this point (adjustment B). Tighten
lock nut (9), page 10.
H
-
1
-
A Controlair ® Valve
Adjustment
“
C
”
Graduated Pressure Adjusting Screw (1)
Adjustment
“
A
”
Eccentric Pin (24)
Adjustment
“
B
”
Travel
Stop 8 and Lock Nut 9
