KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
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With the headlights switched off, the voltmeter voltage shall not be less than 24.5V. If the
voltage is less, it is necessary to take off the battery and charge it from a fixed charger.
If the voltage is higher than or equal to 24.5V, then start the engine up. Run the engine for at
least 2 minutes at idle. Then increase the speed to 1500 RPM and give the full load (service
lights, headlamps, salon heaters are on). If the voltmeter readings are between 27.2V and
28.8V, the generator is operating normally.
Maintenance of air conditioning system
In operation with the use of air conditioner, it is necessary to do the following:
1. Every day perform an inspection of the condenser and remove chaff, vegetation
particles, stuck dirt from the plates and interplate cavities and blow the condenser
down with compressed air, as well as check the tension of V-belt of the compressor
drive.
2. When performing M-1, M-2, M-3, check the tension of the compressor drive belt
and, if necessary, make adjustments. When the force of 4±0.2 kg is applied at point
“P”, belt deflection (Fig.48) shall be within 9...14 mm.
3. In winter season it is necessary to take off the compressor drive belt from the
sheaves.
4. Dehydration filter of the moisture and oil separator must be changed once a year.
5. The frequency of air filter replacement in the air conditioning system shall be once
in every 500 engine hours but at least once a year.
6. The frequency of air filter cleaning and purging in the air conditioning system shall
be once in every 125 engine hours during M-1.
CAUTION!
During operation of the tractor it is necessary to take into account the fol-
lowing features of the air conditioning system.
1. At the ambient temperature below 0°С the system does not operate (the system is
deactivated by the sensor).
Fig. 48 Adjustment of the tension of the
compressor drive belt