Jabiru J450, Руководство конструктора

Страница: 226 / 343

Jabiru J450 Constructors Manual
Post-Paint>Fuselage>Install electrical wiring
Tuesday, April 6, 2010 226 of 343
Engine wiring
All wires will need to be long enough to route from the respective sources, around the engine
in the manner shown, and either to a connection point on the firewall in some cases or through
the firewall plus about 300mm for connection to a multi-pin plug for the majority of cases.
All wires to multi-pin plugs must be labeled (use masking tape) to avoid later confusion.
Refer to the Electrical wiring diagrams task (found immediately before this task) to see where
each wire will be connected to and plan the lengths accordingly.
Careful consideration must be given to the routing of wires around the engine. All wiring in
the engine compartment must be kept well away from all hot and/or moving parts.
The supplied white wire is all aircraft grade and has high temperature insulation but care must
still be taken to route away from obvious heat sources such as the exhaust system.
Wire the oil temperature and pressure senders
These senders are located on the left front of the engine and the single wire from each unit is
routed back under the cylinders to the rear of the engine and zip tied to the pushrod tubes.
Strip 4mm of insulation from each wire and crimp a red
female spade connector and a black heat shrink tag to each.
You will need to cut the insulation from the oil temperature
connector as shown at right to allow it to fit over the „button‟
pin on the oil temperature sender. Note the black heat shrink
tag – this sender unit measures the resistance to earth.
Connect to the oil temperature sender unit, which is located
just above the drain plug on the sump. Crimp over the end of the connector when it has been
fitted to prevent it from slipping off the sender unit. Label each wire.
Fit the other connector to the oil pressure sender unit, which is located above the oil filter.
Note the black heat shrink tag – this sender unit also measures the resistance to earth.
Route both wires back under the cylinders and zip tie them to the pushrod tubes – you will
need to bend the zip ties into a “U” shape first in order to fit them around the pushrod tubes.
In the photos above you can see the 2 wires running back under the pushrod tubes and then up
behind the rear cylinder. You can also see the earth wire from the left magneto (with a black
tag again because it is used to earth the magneto to turn it off). These wires will all need to be
long enough to be routed around the rear of the engine and 300mm into the cabin.