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Sensors and switches

2.14.1 Coolant temperature switch


Switch H has circuit N/O with closing temperature of +110 °C ±3°C, re-opening +85 °C / +100 °C.
R indicates the pin regarding the switch.
With high temperatures, the switch closes the circuit and sends a signal to the control panel, which stops the engine.
Fig 2.39

2.14.2 Oil pressure switch

Oil pressure switch N is situated on the crankcase. 

 

It is a N/C switch, calibrated at 0.4 bar ± 0.1 bar.

With low oil pressure, the switch opens the circuit and sends a signal to the control panel, which also stops the engine.
Fig 2.40

2.14.3 Coolant temperature sensor

 

Tab 2.29

°C R Ω
37.7 1125
65.5 405
93.3 170
100 140
121.1 80

 
Fig 2.41

2.14.4 Oil pressure sensor

 

S indicates sensor connection.

 

 

bar R Ω
0 240
2 170
4 113
6 70
8 30

 

Fig 2.42

 

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