Komatsu HD785-5, Operation & Maintenance Manual

Page: 187 / 307

.
MAINTENANCE
SERVICE PROCEDURE
When deciding the ratio of antifreeze to water, check the lowest temperature in the past, and decide from the mixing
table given below.
It is actually better to estimate and temperature about 10
°
C (18
°
F) lower when deciding the mixing ratio.
The mixing ratio depends on the ambient temperature, but it should always be a minimum of 30% by volume
(antifreeze/total amount of coolant x 100).
The freezing temperature of undiluted antifreeze is -15
°
C (5
°
F). Do not store undiluted antifreeze at a temperature
of below -15
°
C (5
°
F).
Mixing rate of water and antifreeze
Lowest ambient
temperature
°
C -10 -15 -20 -25 -30
°
F 14 5 -4 -13 -22
Amount of
antifreeze
Liters 68.4 79.8 95.76 102.6 114
US gal 18.06 21.07 25.07 27.09 30.10
Amount of water
Liters 159.6 148.2 132.24 125.4 114
US gal 42.13 39.12 35.12 33.10 30.09
WARNING
Antifreeze coolant is flammable, so keep it away from flame.
Antifreeze coolant is toxic. When removing the drain plug, be careful not to get water containing antifreeze coolant on you. If it
gets in your eyes, flush your eyes with large amount of fresh water and see a doctor at once.
Use antifreeze and appropriate water for diluting (for details, see "COOLANT AND WATER FOR DILUTION (PAGE
4-5)")
We recommend use of an antifreeze density gauge to control the mixing proportions.
Prepare a container whose capacity is larger than the specified coolant volume to catch drained coolant.
Prepare a hose to supply antifreeze coolant and water.
1. Stop the engine and close the valve (1) of corrosion resistor
cartridge.
2. Turn radiator cap (2) slowly to remove it.
4 - 22