Doosan GL08K, Руководство по эксплуатации и техническому обслуживанию

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Technical Information - 28 -
2.3.19. Coolant pressure cap

Check the pressure valve opening
pressure using a expansion tank cap
tester.

Replace the filler cap assembly if the
measured valve does not reach the
specified limit.
CAUTION :
Because it is dangerous to open the
pressure cap quickly when coolant is
hot, after lowering the inside pressure of
the tank by slow-opening at first open it
fully.
2.3.20. Cooling water

Regarding the cooling water that is to be used for engine, the soft water not the hard water must be used.

The engine cooling water can be used diluting it with antifreezing solution 40% and the additive for
rust prevention (DCA4) 3 ~ 5 %.

The density of above solution and additive must be inspected every 500 hours to maintain it properly.
NOTE :
During the comparison, if uncertain about color match, pick the lower numbered
block. (example : if the color of NITRITE pad is between standard color “D” and “F”,
then use column E)

Since GL08K cylinder liner is dry type, particularly the cooling water control should be applied thoroughly.

The density of antifreezing solution and additive for rust prevention is able to be confirmed by the
cooling water test kit. (Fleetguard CC2602M or DOOSAN Infracore 60.99901-0038)

How to use the cooling water test kit
(1) When the cooling water temp. of engine is in the range of 10 ~ 55
°C
, loosen the plug for
cooling water discharge and fill the plastic cup about a half.
NOTE :
In taking the cooling water sample, if the water in auxiliary tank were taken, it is hard
to measure the accurate density. Take the cooling water sample necessarily
loosening the cooling water discharge plug.
(2) At the state of a test paper soaked in the sampled water, after taking the paper out through
water agitation, shake off the water.
(3) Wait for about 45 sec. till the color change of test paper.
EG9OM027
Radiator Cap
Radiator
Drain valve