Landing Gear Installation; Engine Installation - Hangar 9 Extra 300 X 120cc Manuel D'utilisation

LANDING GEAR INSTALLATION

1. Attach the landing gear to the fuselage using four 8-32
x 3/4-inch socket head cap screws, four #8 washers
and four 8-32 lock nuts. Use a 1/8-inch hex wrench and
11/32-inch nut driver to tighten the hardware. The gear
will angle forward slightly when installed.
2. Fit the landing gear fairing to the landing gear. There is
a right and left fairing, so make sure to check each side.
The front edge of the fairing will be roughly 3/4-inch
(19mm) rearward of the front edge of the fuselage to
allow clearance for the cowling.
3. Apply a bead of silicone adhesive ONLY where the fairing
fi ts against the fuselage. Slide the fairing into position,
and use low-tack tape to hold it in position until the
adhesive fully cures.
4. Attach the axle to the landing gear using the nut supplied
with the axle. With the fl at areas of the axle facing down,
tighten the axle using a 10mm and 1/2-inch wrench.
5. Slide a 5/32-inch wheel collar on the axle. Use the
supplied wrench to tighten the setscrew so the collar
is centered on the fl at area closest to the landing gear.
Make sure to use thread lock on the setscrew to prevent
it from vibrating loose.
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6. Place a drop of light machine oil on the axle, then slide
the wheel on the axle. Secure the wheel using a 5/32-
inch wheel collar, tightening the setscrew on the outer
fl at area. Make sure to use thread lock on the setscrew to
prevent it from vibrating loose.
7. Check the threads in the blind nut using a 4-40 x 1/2-
inch socket head cap screw. Attach the wheel pant to the
landing gear using two 4-40 x 1/2-inch socket head cap
screws, two #4 lock washers and two #4 washers. Use
a 3/32-inch hex wrench and thread lock when installing
the screws.
8. Repeat steps 2 through 8 to complete the opposite side of
the landing gear.

ENGINE INSTALLATION

1. Mount the engine to the fi rewall using the two hardwood
spacers, four 1/4-20 x 2-inch socket head bolts and four
1/4-inch lock washers. Use thread lock and a 3/16-inch
hex wrench when installing the bolts.
2. Place the throttle servo in the opening in the bottom of
the engine box with the output facing the front of the
fuselage. Use a pencil to mark the locations for the servo
monting screws.
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