Assemble the fuselage, Install the main landing gear – Great Planes Extra 300SP EP ARF - GPMA1188 User Manual
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ASSEMBLE THE FUSELAGE
Note: If you have not already fi gured out how to remove the 
canopy, the magnets at the rear of the canopy keep it locked 
in place. Lift the back of the canopy to remove it.
Install the Main Landing Gear
❏ ❏
1. Slide a 5 mm washer onto the axle. Insert a 4 mm axle
through the right main landing gear. Slide a 5 mm washer 
onto the axle followed by the 5 mm lock nut and the wheel. 
(All of these need to be slid into position before securing the
assembly to the wheel pant). Tighten the axle nut to secure 
the axle to the landing gear. Do this for both landing gears.
❏ ❏
2. Apply a drop of thread locker to two 6-32 set screws
and thread them into two 5/32" [4 mm] wheel collars. Slide 
one wheel collar onto the axle followed by the wheel and then 
the second wheel collar. Tighten the set screws against the 
axle. Be sure the wheel spins freely after the wheel collar is 
in place. Do this for both axles.
❏ ❏
3. Attach the main landing gear to the fuselage with
three 4-40  ½" SHC screws, #4 lock washers and #4 fl at 
washers. Note: The front of the main landing gear sweeps 
back, while the back of the gear is straight. Do this for both 
landing gear halves.