When Required; Clean Inside Of Cooling System - Komatsu GALEO D155AX-5 Operation & Maintenance Manual

SERVICE PROCEDURE

WHEN REQUIRED

CLEAN INSIDE OF COOLING SYSTEM

Immediately after the engine is stopped, the coolant is at a high temperature and the radiator is under high internal pressure.
If the cap is removed to drain the coolant in this condition, there is a hazard of burns. Wait for the temperature to go down, then
turn the cap slowly to release the pressure before removing it.
Cleaning is carried out with the engine running. When standing up or leaving the operator's seat, set the safety lock lever and
the parking lever to the LOCK position.
For details of starting the engine, see "CHECK BEFORE STARTING ENGINE, ADJUST (PAGE 3-67)" and "STARTING ENGINE
(PAGE 3-86)" in the OPERATION section.
Never enter front the machine when the engine is running.
There is danger of touching the fan.
Clean the inside of the cooling system, change the coolant and replace the corrosion resistor according to the table
below.
Kind of coolant
Permanent type antifreeze
(All season type)
Non permanent type antifreeze
containing ethylene glycol
(winter, one season type)
When no using antifreeze
Stop the machine on level ground when cleaning or changing the coolant.
Use a permanent type of antifreeze.
If, for some reason, it is impossible to use permanent type antifreeze, use an antifreeze containing ethylene glycol.
The ratio of antifreeze to water depends on the ambient temperature, but to obtain the corrosion resistance effect,
a minimum ratio of 30% by volume is necessary.
When deciding the ratio of antifreeze to water, check the lowest temperature in the past, and decide from the mixing
rate table given below.
It is actually better to estimate a temperature about 10°C (18°F) lower when deciding the mixing rate.
Mixing rate of water and antifreeze
Min. atmospheric
temperature
Amount of antifreeze
Amount of water
4 - 20
Cleaning inside of cooling system
and changing coolant
Every year (autumn) or
every 2000 hours,
whichever comes first
Every 6 months (spring, autume)
(Drain antifreeze in spring,
add antifreeze in autumn)
Every 6 months or
every 1000 hours,
whichever come first
° C
-10 -15
° F
14 5
liter 32.1 38.5
US gal 8.48 10.17
liter 74.9 68.5
US gal 19.79 18.10
WARNING
-20 -25 -30
-4 -13 -22
42.8 49.2 53.5
11.31 13.00 14.13
64.2 57.8 53.5
16.96 15.27 14.13
MAINTENANCE
Replacing corrosion resistor
Every 1000 hours and when
cleaning the inside of the
cooling system and
when changing coolant
-35 -40
-31 -40
57.8 62.1
15.27 16.41
49.2 44.9
13.00 11.86