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OP001015
Inspection, Maintenance and Adjustment
4-80
Fan Motor Pressure and Fan rpm
The motor intergrates a proportional pressure relief valve, the
fan speed (and thus the cooling performance) can be infinitely
controlled depending on two different simultaneous input signals
from temperature sensors.
The cooling fan controller processes the two input signals and
controls the valve coil current. The proportional relief valve has a
fail safe characteristic, this means, max. relief valve setting is
adjusted automatically if the voltage supply is interrupted (e.g.
broken wire). This results in a max. fan speed and therefore in a
max. cooling performance.
Fan Motor Pressure
Standard
100+5/-0 kg/cm
2
(1,422 +70/-0 psi)
Fan rpm
1,200
7
8
4
3
2
9
1
6
5
FG014480
Figure 116
Reference
Number
Description
1
Engine
2
Cooling Pump
3
Cooler
4
Cooling Fan Controller
5
Fan Motor
6
Cooling Fan
7
Temperature Sensor (T/M Oil)
8
Temperature Sensor
(Coolant Water)
9
Transmission
Reference
Number
Description
Содержание DL220
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