3 © 2001 3.3 Monitoring Operation Engine Operation © 24 985 2 When the V-belt is torn, the pressure pin 1 of electrical switch is actuated by the ten- sion roller and an audio signal or a light signal is emitted. Switch off the engine immediately to avoid overheating. 3.3.3 Cooling fan drive Engine Temperature Gauge The engine temperature gauge pointer should remain in the green sector most of the time. It should rarely enter the yellow- green sector. If the pointer enters the or- ange sector, the engine is overheating. Turn off and establish the cause from the Fault Table (see 7.1). 3.3.2 Engine temperature © 24 985 2 © 24 985 2 © 24 590 2 © 24 590 2