7.3 Circuit Protection. M92B only.
There are two circuit breakers mounted within a steel enclosure that is mounted on the right hand side of the
engine behind the alternator.
The 10A circuit breaker is to protect the instrument and control panel/panels mounted away from the engine.
The 80A circuit breaker is to protect the negative line during momentarily grounding the engine whilst of the
glow plugs are operating. This protects the engine harness in the event of a stray positive supply accidentally
nding its way to the block. This is most likely to happen during installation.
Voltage Sensitive Equipment
The M92B contains two components that are voltage sensitive and therefore require an additional piece of
equipment when the voltage is outside of their operating range. They are:
The stop solenoid tted to all engines is for 24v operation.
The fuel lift pump tted to all engines is for 12v operation.
M92B – 12v models are supplied with a voltage inverter that inputs 12v and outputs 24v. This allows the stop
solenoid to function when required. The inverter is coloured red.
M92B – 24v models are supplied with a voltage converter that inputs 24v and outputs 12v. This allows for the
continuous operation of the fuel lift pump when the engine is running. The converter is coloured black.
Both the inverter and converter are supplied with an extension lead so that they can be mounted away from
the engine.
Inverter/Converter Fitting Instructions
Note: The inverter/converter must not be engine
mounted.
Select a cool, dry and ventilated position.
Use the bracket to mark the position of the holes.
Drill 3.5mm holes.
Fix the clip using screws provided.
Click the unit onto the clip.
First connect both input wires. Second connect the
output wires.
Max. temp. 55
O
C. Mount unit remote from engine in
a cool, dry and ventilated position.
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