| Before operating the air conditioning system after recharging with refrigerant |
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| When a new compressor is mounted or the refrigerant oil is replaced (e.g. after blowing out the refrigerant circuit with compressed air), the compressor pulley must be turned 10 full turns by hand before stating the engine. This will prevent damage to the air conditioner compressor. |
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| In 5 and 10 cylinder diesel engines, turn the compressor 10 full turns by hand at the overload protection. Then, mount the compressor. This will prevent damage to the air conditioner compressor. |
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| With the air-conditioner turned off (electromagnetic coupling for air-conditioner -N25- and regulating valve for air-conditioner compressor -N280- are not activated), start the engine. |
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| Once the engine starts idling at a stable speed, turn on the air-conditioner and let it run for at least 10 minutes at maximum cooling power. |
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