Hangar 9 B25J Mitchell ARF Assembly Manual page 52

Step 24
Route the air lines from the retract unit through the nacelle
loosely. If you are installing the retracts and the wing
extensions are already in place, then you will need to use
a string and a weight to fish the air lines through the wing.
Both sets of these air lines will be hooked up later using
the Robart air installation diagram which we have included
on page 73 of this manual)
Section 8: Retractable Landing Gear Installation
Step 25
Install the main wheel onto a wheel axle and then install
and axle into the strut. The washers act as spacers to keep
the wheel from rubbing against the strut leg. Temporarily
tighten the setscrew and then cut off the excess axle using
a rotary tool and cutoff wheel. File a flat area on the axle
for the wheel strut setscrew and then install the wheel and
axle to the main wheel strut.
Step 26
Repeat Steps 17 through 25 for the remaining main gear.
Note: Use threadlock on all screws to keep
them from coming loose during flight.
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