Instruction Manual
68 2954 2510 03
4.10 Coolant check
In order to guarantee the lifetime and quality of the product, thus to optimise engine protection,
regular coolant-condition-analysis is advisable.
The quality of the product can be determined by three parameters:
Visual check
• Verify the outlook of the coolant regarding colour and make sure that no loose particles are
floating around.
pH measurement
• Check the pH value of the coolant using a pH-measuring device.
• The pH-meter can be ordered from Atlas Copco with part number 2913 0029 00.
• Typical value for EG = 8.6.
• If the pH-level is below 7 or above 9.5, the coolant should be replaced.
Glycol concentration measurement
• To optimise the unique engine protection features of the PARCOOL EG the concentration of the
Glycol in the water should be always above 33 vol.%.
• Mixtures with more than 68 vol.% mix ratio in water are not recommended, as this will lead to
high engine operating temperatures.
• A refractometer can be ordered from Atlas Copco with part number 2913 0028 00.
Never remove the cooling system filler cap while coolant is hot.
The system may be under pressure. Remove the cap slowly and only when
coolant is at ambient temperature. A sudden release of pressure from a heated
cooling system can result in personal injury from the splash of hot coolant.
In case of a mix of different coolant products this type of measurement might
provide incorrect values.
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