Jabiru J450 Constructors Manual
Pre-Paint>Fuselage>Firewall forward>Firewall fittings
Tuesday, April 6, 2010
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Cabin heater
Measure up 180mm from the lower bend and in 340mm from the left hand side of the firewall
step and drill a pilot hole, then drill a 1 5/8” (41mm) hole for the cabin heater firewall fitting.
The fitting is in several parts: press the machined end of the short section of tube into the hole
on the side of the main body. Assemble the shaft, flap and actuating arm and then push the
threaded end of the main body through the firewall.
Turn the main body so that the pressed-in tube faces the left of the aircraft and fit a small
screw into the notch in the flange to prevent the main body from turning (circled above).
Drill a 1/8” hole in the firewall above the main body and directly below the shaft: pop rivet
the right-angled spring bracket into this hole and connect the spring to it. Drill a 5/16” hole
for the cable directly in line with the end of the actuating arm. Fit the retaining nut to the
threaded end of the main body on the inside of the firewall and tighten firmly.
Cable hole
Spring bracket
Spring bracket