Jabiru J450 Constructors Manual
Post-Paint>Fuselage>Install electrical wiring
Tuesday, April 6, 2010
232 of 343
Wire the fuel pump
Two fuel pump wires were fitted through the console to the fuel pump in the
Pre-Paint>
Fuselage>Fit control cables and lines
task: one wire will be the positive and one wire will be
the negative or earth to the fuel pump. Determine which wire will be the positive wire and
which will be negative or earth wire and label each end of each wire with masking tape. The
forward or firewall end of both wires will be fitted to Connector
D
.
Route the firewall end of both wires so that there is enough length for Connector
D
and then
trim the rear ends of both wires so that they end beside the fuel pump.
Fit a red female spade connector and a red heat shrink tag to the positive wire and a red male
spade connector and a red heat shrink tag to the red wire from the fuel pump. Connect the
positive wire to the red wire from the fuel pump.
Crimp one 4mm ring terminal with a black heat shrink tag to each of the following wires:
1.
The negative or earth wire from Connector D;
2.
The black wire from the fuel pump;
3.
A 100mm length of 16 gauge wire – this will earth the header tank quick drain:
4.
2 lengths of 16 gauge wire 100mm longer that the fuel lines – these wires will earth
the wing tank quick drains. Crimp both wires into the one ring terminal.
Drill a 4mm hole through the floor near the fuel pump and fit a 4mm countersunk screw with
a Tinnerman washer from under the fuselage, then place all 4 ring terminals over the screw
and secure them with an M4 Nyloc nut and washer. Tighten firmly. This will ensure a secure
fixed earth point for the entire fuel system that cannot accidentally become disconnected.
Feed the 100mm length of 16 gauge wire
under the header tank, out of the quick drain
hole and through a small hole in the side of
the quick drain fairing, trim to length and fit
a 4mm ring terminal with a black heat shrink
tag and fix to the side of the quick drain
fairing with a stainless steel self tapping
screw as shown at right.
Run a length of twisted lock wire from the quick drain fitting to the same point, fit a 4mm
ring terminal with a black heat shrink tag and connect it under the same self tapping screw as
shown above. This will lock the quick drain fitting in place and also earth the header tank.
Run the wing tank earth wires along the outside of the protective sheath with the fuel lines to
the wing tanks and zip tie the wires in place. These wires will be connected when the wings
have been fitted. Label both wires [Earth] with masking tape.
Wire the flaps and optional landing lights
Run a pair of 16 gauge wires from the firewall through the console, along the back of the front
seats and up behind the door to the flap motor. Fit male and female spade connectors to
connect to the flap motor.
Landing light wires follow the same path through the console and are then routed out through
the floor and up inside the left hand wing strut.
Label each pair of wires for later fitting to Connector
D
.