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Jabiru J450 Constructors Manual
Pre-Paint>Fuselage>Undercarriage>Assemble main gear
Tuesday, April 6, 2010
39 of 343
Adjust the brakes
The objective is to have a wheel that will turn freely while at the same time not having the
brake pads too far away from the disc.
In order to achieve this it may be necessary to slightly bend the brake mounting plate away
from the disc – loosen the main bolts just enough that the outer pads are 1 or 2mm away from
the disc and check just the clearance between the inner backing plate and inner pads.
If the inner pad is rubbing and making it difficult to turn the wheel, gently bend the brake
mounting plate slightly away from the disc until the wheel can turn freely but with the pad
just touching the disc.
Repeat the process for the other caliper.
Now tighten the main bolts up until the outer pad just starts to bind on the disc and then back
the bolts off slightly, perhaps one third to one half of a turn. At this point the wheel should
turn freely and the brake pads should still be very close to the disc.
In the photo at right you
can see the finished brake
assembly, fully adjusted.
Note that there is very little
clearance between the disc
and the brake pads.
Note also the springs on
the bolts that hold the pads
apart.
At the left of the photo you
can see the spat bracket
with the captive nut visible.
This completes the
Pre-Paint>Fuselage>Undercarriage>Assemble main gear
task.
Brake disc
Inner pad
Outer pad
Brake caliper
Brake mounting
plate
Tire
Main bolt