Doosan G625XF, Руководство по эксплуатации и техническому обслуживанию

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50 Hz: G625 - G690 - G750XW/XF
OPERATION & MAINTENANCE MANUAL 40 60 Hz: G655 - G750 - G800 - G850XW/XF
MEASUREMENT OF COOLANT CONCENTRATION
• Special Tools
The coolant concentration can be measured as follows:
1. If the engine coolant temperature is within a range of
10 ~ 55°C, drain the coolant and fill half a plastic cup
with it.
CAUTION
When taking out a sample of coolant from the
supplementary tank, it is difficult to measure the
precise concentration. Always take out sample by
opening the drain plug of coolant.
2. Soak the test sheet in the coolant and take it out after
3 ~ 5 seconds. Shake the sheet to remove the
remaining coolant.
3. Wait for approximately 45 seconds until the test sheet
changes its colour.
CAUTION
Measurement time should not exceed 75 seconds.
The colour changes as time passes.
4. Check the colour on test sheet.
1) Compare the colour of part (A) on the test sheet to
the colour of GLYCOL/FREEZEPOINT (End pad) of
the standard colour table.
2) Compare the colour of the test sheet (B) to the
colour of MOLYBDATE (Middle pad) of the standard
colour table.
3) Compare the colour of the test sheet (C) to the
colour of NITRITE of the standard colour table.
5. Compare and confirm the parts with identical colours
on the test sheet and the standard colour table.
1) Compare the changed pink colour part A of the test
sheet with the GLYOOL/FREEZEPOINT (End pad) of
the standard colour table on top of the container and
confirm the concentration. The concentration
indication has to be within the colour scope of
33~50%
2) The state of additives for anticorrosion is shown on
the point where the colour of MOLYBDATE (Middle
pad) on the standard colour table (which is identical
with the Middle (B) of the test sheet) is crossed with
the colour of NITRITE on the standard colour table
(which is identical with the (C) of the test sheet). It
should be maintained at the optimum range, in the
green section between 0.3 to 0.8.
3) If the measurement result is below 0.3, replenish
anticorrosion additives (DCA4). If it is above 0.8, drain
a little coolant and then add clean tap water to adjust
the concentration.
CAUTION
If the colour on the test sheet does not match the
colour of the standard colour table, find a middle
colour on the standard colour table. For example, if
the colour of (C) of the test sheet matches D and F on
the NITRITE of the standard colour table, select E.
To prevent corrosion inside of the engine cooling
unit, drain the coolant and replace it with new
coolant once a year.
Figure Product Number/Name
60.99901-0038 CC2602M
Coolant test sheet
test sheet
test sheet
EDL0213002A
EDL022154A
SCA Units per litre
NITRITE
MO
L
YBD
A
TE
(MIDDLE
P
AD)
TEST
SERVICE
PRE CHARGE
% GL YCOL / FREEZEPOINT (°C)(End Pad)