Coolant Check - Atlas Copco QAS 100 Instruction Manual

Coolant check

Monitoring coolant condition
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.
Long service intervals
!
5-year drain interval to minimize
service costs (when used in accordance
with the instructions).
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.
In case of a mix of different coolant
!
products this type of measurement
might provide incorrect values.
Topping up of coolant
– Verify if the engine cooling system is in a good
condition (no leaks, clean,...).
– Check the condition of the coolant.
– If the condition of the coolant is outside the limits,
the complete coolant should be replaced (see
section "Replacing the coolant").
– Always top-up with PARCOOL EG.
– Topping up the coolant with water only, changes
the concentration of additives and is therefore not
allowed.
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Replacing the coolant
Drain
– Completely drain the entire cooling system.
– Used coolant must be disposed or recycled in
accordance with laws and local regulations.
Flush
– Flush twice with clean water. Used coolant must
be disposed or recycled in accordance with laws
and local regulations.
– From the Atlas Copco Instruction book, determine
the amount of PARCOOL EG required and pour
into the radiator top tank.
– It should be clearly understood that the risk for
contamination is reduced in case of proper
cleaning.
– In case a certain content of 'other' coolant remains
in the system, the coolant with the lowest
properties influences the quality of the 'mixed'
coolant.
Fill
– To assure proper operation and the release of
trapped air, run the engine until normal engine
operation temperature is reached. Turn off the
engine and allow to cool.
– Recheck coolant level and add if necessary.