Installing The Gear Bracket; Installing The Wheel Pants; Adjusting The Wheel Pants - Model Tech Extra 300 Instructions For Final Assembly

INSTALLING THE GEAR BRACKET

1) Using a modeling knife, remove the cover-
ing from over the three predrilled gear mounting holes.
Two holes are located 15/16" forward of the front
bulkhead and 7/8" in from each side of the fuselage.
One hole is located 1/2" forward of the front bulk-
head and 1-13/16" in from the fuselage sides.
2) Install the prebent aluminum gear bracket
using the three 3mm x 15mm machine screws and
three 3mm flat washers. Three 3mm blind nuts have
been preinstalled inside the fuselage. Tighten the
screws completely. See photo # 17 below.
Photo # 17
Washer
Gear
Bracket

INSTALLING THE WHEEL PANTS

3) Working with one wheel pant at a time, use
a very sharp modeling knife and remove the plastic
that covers the wheel opening on the bottom of the
wheel pant.
4) Using a pen and a ruler, locate and mark the
location of the axle hole on one side of the wheel
pant. The hole should be located 1/4" up from the
bottom of the wheel pant opening and centered in the
middle of it.
5) Using a 1/8" drill bit, drill a hole through the
wheel pant at the location you marked.
6) Using a modeling knife, cut a slot from the
hole down to the wheel pant opening. See photo #
18 below.
Photo # 18
Drill Hole
Cut
Opening
Machine
Screw
Cut Slot
12
7) Slide one 3mm flat washer onto one 3mm x
35mm machine screw. Slide one 50mm diameter
wheel onto the machine screw, up against the washer.
8) Slide one 3mm nylon spacer up against the
wheel, then thread one 3mm nylon insert nut up
against the nylon spacer.
9) Tighten the nut against the nylon spacer as
tight as it can be, but still allow the wheel to spin free
on the axle. Apply a couple of drops of Kwik Bond
Thin C/A to the nut to prevent it from turning. See
photo # 19 below.
Photo # 19
Nylon
Insert
Nut
Nylon
Spacer
10) Slide one 3mm flat washer over the machine
screw and up against the nylon insert nut. Carefully
slip the wheel and axle assembly into the wheel pant.
The machine screw should slip firmly into the slot in
the wheel pant and the flat washer should be posi-
tioned inside the wheel pant.
11) Slide the machine screw through the pre-
drilled 3mm hole in the aluminum gear bracket and
secure in place using one 3mm nylon insert nut.
Tighten the nylon insert nut completely while hold-
ing the inner nylon insert nut in place with pliers.
Double check that the inner nut has not moved and
that the wheel does not bind when rotated.
12) Repeat steps # 1 - # 12 for the second wheel
pant assembly. Be sure to make one right and one
left wheel pant assembly.

ADJUSTING THE WHEEL PANTS

13) With both wheels and wheel pants installed
on the gear bracket, set the airplane on it's wheels on
a level surface. Adjust the wheel pants so that the
bottom rear portion of the wheel pants are level with
the ground. Double check that both wheel pants are
level with each other.
14) When satisfied with the alignment, secure
the wheel pants in place by installing one 2mm x 8mm
wood screw through the predrilled hole in the gear
Machine Screw