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Trekker - Squab
16
ELECTRIC EQUIPMENT
a
d
b
c
1
110 Ω
750 Ω
0,4 Ω
0,7 Ω
Value flywheel control
1 - Flywheel
a - ignition
b - sensor
c - alternative current
d - battery charge current
1 - Yellow wire
2 - Green-black wire
3 - Heating resistance (PTC)
4- Wax
5 - Membrane
6 - Intermediate fluid
7 - Push piston
8 - Return piston
9 - Return spring
10 - Air throttle valve
11 - Needle
12 - Needle well
13 - Needle spring
14 - “O” ring seal
2
3
4
5
7
8
9
10
11
12
14
6
13
1
Note :
The rear bulb is composed of 2
filaments, one 5W filament supplied
with alternating current for the taillight,
one 21 W filament supplied with direct
current for the stop light.
1/ Solving lighting faults
- Check the bulbs; power, voltage,
compliance with European standards
(El).
- Check the connections (especially
those of the regulator).
- Check the voltage
using a multimeter (MX40) set to the
AC voltmeter position.
check at the terminale of a bulb
(brown wire), that voltage does not
exceed 12 volts ± 0.5V when
accelerating the engine. If the voltage
is over 13V, check the regulator
connection (especially the green earth
wire). If necessary, change the
regulator (it is not possible to check
the regulator when static).
2/ Checking
Check the continuité capacities of the
three coils of the flywheel. Engine
stopped.
Lighting and starter: yellow wire and
earth wire = 0.4 ohm.
CHOKE
1. Operating principle
Cold starting: the choke is
automatically in opération: the
carburettor’s mixture enrichment
circuit is open.
As soon as the vehicle is switched on,
the heat résistance which is supplied
by the flywheel magneto causes the
continuons wax to expand in its
capsule. The diaphragm pushes the
master and intermediate pistons which
cause the air duct to the throttle valve
to close gradually and to progressively
block fuel flow with the needle. When
the engine is warm, with the ducts
blocked, the enriching circuit is not
operational.
2. Checking
- Average résistance value of the
choke alone - 5 ohms.
Note :
The résistance value varies depending
on résistance température: the colder
the température, the lower the
résistance value and vice versa.