Nanni T4.155 seriers, Workshop Manual

Page: 14 / 191

60300140 (
indice A
) 4 CYLINDERS WORKSHOP MANUAL 14/191
DANGER – Shut down the engine and turn off the battery isolation valve before performing any work on the
electrical system
Battery
- Check the condition of battery elements once per season.
- The density of the electrolyte must be between 1.270 and 1.285.
- Check the electrolyte level periodically. The level must be 1cm above the plates. Only add distilled water if
necessary.
DANGER – Never bring a flame close to the battery or check the battery with a spark, as the discharged
gasses are flammable and explosive. The electrolyte in the battery is highly corrosive. If the acid touches
the skin, immediately wash with soapy water. If splashed into the eyes, generously rinse with water and
immediately consult a physician.
-
Do not short circuit.
RECOMMENDATIONS
To ensure perfect operation of the alternator and the built-in regulator, never :
- Turn off the main battery isolation switch of the circuit when the engine is running (regulator can be
destroyed).
- Reverse battery terminals. The terminals are respectively (positive) and – (negative). The latter
indicated terminal is connected to earth. Cable terminals, as well as cables, must be correctly secured.
- Change the circuit load when the engine is running.
Install a load distributor (Consult a NANNI DIESEL representative) to use several batteries.
When starting with a spare battery and jumper leads, proceed as follows:
- Disregard the main battery circuit, connect the spare battery to the main battery by connecting the + to the
+ and the – to the -. As soon as the engine starts, remove the jumper cables and do not turn off the main
battery circuit.
You must disconnect the two battery cables when:
- you use a battery charger
- before any work on electrical equipment
- before performing welding work on a metal hull
Cooling circuit rinsing
Fresh water circuit
- Open the filling cap located on the exchanger.
- Open the draining plug under the turbo charger volute.
- Loosen the hollow screw coupling located under the exhaust manifold.
- Remove the block drainage plug located on the thermostat support.
- Drain old fluid from the temperature exchanger and the engine block.
- Fill the circuit with fresh water and allow the engine to run for a few minutes.
- Apply the filling/priming procedure described in the "Closed cooling circuit" paragraph.
- Drain the water and fill again with antifreeze/fresh water mixture.
- Top up the cooling circuit according to the specifications.
NOTE: If a hot water circuit is connected to the engine, fully drain it and refill taking into account the added quantity of
mixture. Make sure that the air in the circuit is fully evacuated during filling.
WARNING: Pressurized fluid. Do not open the cap when the engine is hot. Allow the engine to cool and
carefully open the cap.