GREAT PLANES Waco YMF-5 Instruction Manual page 20

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3. Fit a screw-lock pushrod connector to the outermost
hole on short servo arm. Choose the arm that is 90° to the
servo case at 1/2 throttle. Clip off the unused servo arms.
Use a nylon retainer to secure the pushrod connector to the
servo arm. Place a drop of thread locking compound on the
screw threads and fit a 4-40 x 1/8" [3.2mm] SHCS. Fit the
servo arm onto the servo. Install the throttle servo in the
servo tray so that the end of the servo arm is in line with the
pushrod tube.
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4. Position the pushrod tube about 4" [102mm] from the
servo. Cut the pushrod tube 3/8" [9.5mm] forward of the
firewall. Fit the wooden pushrod tube standoff inside the
fuselage at the former that lines up with the leading edge of
the lower wing. Mark the position of the standoff with a felt
tipped pen. Remove the pushrod tube and sand the outside
of the tube at the place that you marked and at the firewall
end of the tube.
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5. Glue the pushrod tube in place at the firewall using epoxy.
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6. Thread a nylon clevis onto a 36" [914mm] pushrod and
fit a silicone retainer. Insert the pushrod into the pushrod
guide tube. Slide the pushrod into the screw lock pushrod
connector. Connect the clevis to the throttle arm. Secure the
clevis with a silicone retainer. Do not tighten the screw lock
pushrod connector yet.
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7. Turn on your radio and check to see that the servo
moves in the proper direction. With the throttle servo and
the throttle set to full, tighten the screw on the screw lock
pushrod connector. Cut off any excess pushrod and test the
operation of the throttle. Glue the wooden standoff to the
former as shown so that the pushrod tube is supported.
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8. Install the servo arm retaining screw. Use this
opportunity to set up a throttle cutoff and a flight timer on
your transmitter.
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