Model Tech Sukhoi SU-31 Assembly Instructions Manual page 19

IMPORTANT Depending on the length of your throttle servo lead, you may need to use a 12" long servo extension lead to reach
the radio hatch.
Step 2: inStallinG the adJuStaBle puShrod ConneCtor
Step 3: inStallinG the throttle Control linkaGe aSSeMBlY
❑ Connect your radio system and check that the throttle servo output shaft is rotating in the correct direction, then position the throttle
control stick and the throttle trim lever to their lowest positions.
❑ Open and close the throttle several times to ensure that the carburetor opens and closes completely. You may need to adjust your
transmitter EPA settings to achieve perfect settings.
❑ Install the throttle servo into the mounting hole on the right side of the
fuselage, making sure to drill 1/16" (1.6mm) diameter pilot holes for the
mounting screws.
IMPORTANT The servo output shaft should be toward the back of the
fuselage.
❑ Cut away all but one arm from a "4-point" servo horn, then enlarge the
third hole in the servo arm, using a 5/64" (2mm) diameter drill bit.
❑ Install the adjustable pushrod connector onto the servo arm, making sure
not to tighten the nut too tightly. You don't want the pushrod connector loose,
but it should be able to rotate without binding.
IMPORTANT To prevent the nut from loosening during flight, apply a
drop of thin C/A to it. Allow the C/A to fully cure before proceeding.
❑ Attach the Z-Bend in the pushrod wire into the outermost hole in the
throttle arm.
☞
You may need to enlarge the hole in your engine's throttle arm, using a
5/64" (2mm) diameter drill bit, to accommodate the wire.
❑ Slide the adjustable pushrod connector assembly onto the pushrod wire,
then install the servo horn onto the servo, making sure that it's angled back
about 30 degrees.
❑ While holding the carburetor fully closed, install and tighten the machine
screw in the adjustable pushrod connector.
❑ Cut away the excess pushrod wire, then install and tighten the servo horn
retaining screw to hold the servo horn securely to the servo.
Page