5 Maintenance 5.7.2. Maintenance upon demand Checking the air-conditioning system Check the air-conditioning system twice a year, in spring and autumn. Cleaning the condenser of air conditioning NOTE Do not wash the condenser with a steam cleaner. Otherwise, the condenser will get hot and may break down. If there is mud or dust sticking to the air conditioner condenser, clean it with water. If the water pressure is too high, the fins may get deformed. When washing with a high pressure washing device, apply the water from a reasonable distance. Checking the coolant level If the liquid gets into your eyes or on your hands, it may cause loss of sight or frostbite:
Therefore never loosen any part of the refrigerant circuit. Operate the cooler of the air-conditioning system for 5 - 10 minutes, then touch the high pressure portion and low pressure portion of the compressor (or high pressure hose and low pressure hose joint) with your hand. At the same time, inspect the flow of coolant (R134a) through the sight glass to check the gas level. Sight glass Contact your Komatsu dealer for this inspection. The sight glass is installed next to the receiver at the side of the condenser. To this end the ladder at the right must be removed and the condenser folded out. Receiver GK100335 5-34 WA90-5 – VEAM270100 WARNING WARNING