Finish The Radio Installation - GREAT PLANES RV-4 Instruction Manual

2. Now is the time to decide if you are going to fill the tank
through a fuel filling valve or whether you are going to use a
third line as a fill line. If you choose to use a fill valve, insert
two 12" [305mm] lengths of silicone fuel tubing through the
holes in the firewall. Pull the tubing into the radio
compartment of the fuselage. If you are going to use a third
line for filling, drill 1/16" [1.6mm] hole in the center of the
third nipple on the fuel tank. Clean any debris from inside of
the tank. Then insert three 12" [305mm] lengths of silicone
fuel tubing through the holes in the firewall. Attach the lines
to the fuel tank following the instructions with the fuel tank.
3. Remove the fuel tank top cover from the engine mount box.
This will assist you as you install the fuel tank. Pull the tank into
the fuselage by pulling on the fuel lines where they exit from the
firewall. Position the tank against the firewall by reaching into the
top of the engine mount box. Re-install the engine. Attach the
vent line to the muffler and the fuel pickup to the carburetor. The
lines from the fuel tank should be just long enough to reach the
carburetor and the muffler. Cut the lines as needed. When
everything is positioned, re-attach the fuel tank cover.

Finish the Radio Installation

1. Locate the 2-56 x 12" [305mm] wire pushrod. Cut it to a
length of 10-1/2" [267mm]. On the threaded end of the
pushrod attach a clevis retainer and clevis by turning it onto
the threaded end approximately 25 turns. Slide the wire into
the outer pushrod tube in the firewall. Attach the clevis to the
throttle arm and slide the clevis retainer in place on the clevis.
RETAINER
2. Install the brass Screw Lock Set onto the end hole of
the servo arm of the throttle servo. Assemble it as shown in
this sketch.
3. Slide the throttle pushrod into the screw lock set on the
servo arm. Turn on the transmitter and receiver. Advance the
throttle servo to the full throttle position. Open the carburetor
on the engine to the fully opened position Tighten the set
screw on the screw lock set onto the throttle pushrod wire.
Turn the radio system off when finished.
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