KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
55
16
– Engine hour meter / voltmeter
The instrument shows the number of engine hours during the first 3...5 s after switching on the
battery master switch.
In the course of operation the instrument reading range shall be 22.8
–30.0 V. The increase or
decrease of readings indicate afault of the generator or voltage regulator.
17
– Keylock switch of the starter and instruments
The lock has the following positions:
zero position (fixed)
– the key is inserted vertically;
first position (fixed)
– the key is turned in the clockwise direction. Power is supplied to the
generator excitation winding;
second position (non-fixed)
– with the key being turned further in the clockwise direction
power is supplied to the generator excitation winding, voltage regulator and starter drive
relay. In case of the key being released from this position, it will return to the first position;
third position (fixed)
– the key is turned in anticlockwise direction from the zero position.
This position is provided at the operation of the radio equipment on the tractor.
18
– Indicator lamp of alarm signaling of the emergency engine parameter (yellow)
Yellow-colored
indicator lampcomes on in the following cases:
the rotational speed of the engine shaft is 300 RPM;
the cooling fluid temperature has reached the limit permissible value;
the engine oil level is the limit permissible one;
the engine oil level is the limit permissible one;
abnormal operation (break) of the CAN electrical circuit;
abnormal operation (program error) of the ADMFR electronic unit.
In case when the yellow indicator lamp comes on, it is necessary to check the readings of
gauges by temperature, pressure, oil level (by the indicator lamp) and perform the required
maintenance of the engine.
In case when the yellow indicator lamp comes on at the normal readings of the above-
mentioned gauges, it is necessary to check the operation of PLD and ADM units by the efforts
of Mercedes Benz servicing specialists.
25
– Indicator lamp of oil overheating of the hydraulic system
