Pressure, Vacuum and Temperature Specifications

A/C Compressor Cycleing:
Start Of Pulse (see footnote [3]) 121 - 123° C
Emergency Off 126 - 128° C
Electric Auxiliary Fan:
1st Stage On/Off (see footnote [1]):
A/C Pressure 14
Coolant Temperature 95
2nd Stage On/Off (see footnote [2]):
A/C Pressure 20
Coolant Temperature 115°C
Pressure Cap Opens:
1st Stage On/Off 1.3 - 1.5 bar
2nd Stage On/Off 1.8 - 2.2 bar
Maximum Coolant Temperature 130/137°C
Thermostat:
Start Of Opening 85 - 89°C
Maximum Opening 102°C
Viscous Fan Clutch:
Cut In Temperature 96-104°C
Safety Cut Off Speed:
Engine Speed 4500 RPM
Fan Speed 3250 RPM

[1]: At refrigerant pressure in bar.
Cut in 1st stage speed responsive: compressor switched on
< 40 km/h on
> 70 km/h off
[2]: At coolant temperature in degrees C.
[3]: Pulse duration: 50% on time, 20 seconds on, 20 seconds off