Daewoo ST Series Instruções de Operação Página 27

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4.3.2. Contamination check of the coolant and the quantity of the anti-freeze
We recommend the engine coolant for DAEWOO marine engines should be mixture of fresh
water and additional agent (35 ~ 40% anti-freeze and 3 ~ 5% anti-corrosion agent).
Check the quantity of the anti-freeze every 600 hours. From time to time, refill the anti-freeze
as much as required.
You can check the quantity of anti-freeze and anti-corrosion agent by using a FLEETGUARD
test kit simply as follow. (Fleetguard CC2602M : DHI No. ; 60.99901-0038)
1) Contamination check
How to use test kit (Striped pad)
(1) Collect half of a coolant sample cup from a drain plug at the lower side of the oil cooler
or cylinder block. Coolant must be between 10°C and 55°C when tested. Room
temperature is preferred.
Do not collect the coolant from the expansion tank or overflow system.
The collected sample is less contaminated, so it can not be substituted for the quality of
whole coolant.
(2) Shake the bottle filled with sample coolant to mix well and take out one strip from bottle
of the test kit. Then dip the strip in coolant sample for 3~5 seconds, take it out and shake
it briskly to remove excess liquid.
Do not touch the pads on the end of the strip. Discard the kit if unused strips have
turned brown for the nitrite test pad.
(3) Wait for 45 seconds after taking the strip out in the bottle of the sample coolant, then
compare the color of the pads with the standard color chart of the test kit label and record
the result as follows.
Caution : All three pad readings must be completed no later than 75 seconds after
dipping strip.
Do not touch the stripe with fingers.
How to judge the strip
a) Compare FREEZEPOINT (end pad) to chart and record result.
b) Next compare MOLYDATE (middle pad) to chart and record result.
c) Finally compare NITRITE test to chart and record result.
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strip
c) b) a)
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