Yuchai U35, Руководство оператора

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5-18
Open the engine hood and use high-pressure water or compressed air to blow away debris
such as dust or leaves that clog the radiator fins, oil cooler fins. At the same time, clean the
protective strainer in front of the oil cooler. For machines equipped with air conditioning, it is
also necessary to clean the condenser fins.
Warning: If compressed air, high-pressure water, and steam directly hit the
body, or are used to blow away dust or dirt, there is a risk of serious injury.
Therefore, it is necessary to use goggles, dust masks, and other protective
masks.
Attention: To prevent damage to the heat sink, the distance between the nozzle of
high-pressure water or compressed air and the surface of the radiator (water tank) should be
over 500 mm.
Damaged heat dissipation fins can cause water leakage or overheating. In dusty areas,
check the heat dissipation fins daily, which shall not be limited by the maintenance intervals.
4. Replace the coolant
After 50 hours of operation, perform the
first replacement. Replace twice a year
thereafter, once each in spring and
autumn.
1) Remove the radiator (water tank)
cover, unscrew the water valve, and drain
the coolant;
2) Clean the cooling circuit, close the
drain valve, fill up the special cleaning
fluid, then start the engine, operate the
engine at low speed for 10 minutes, and
then stop the engine to discharge the
cleaning fluid;
3) Close the drain valve again;
4) Fill up the coolant, make the engine
idle for a few minutes, so that the coolant
fills the entire cooling circuit;
5) Check the coolant level and replenish
the coolant.
Warning: Do not open the radiator (water tank) cover from a hot engine. The
radiator cover should not be opened until the coolant temperature drops
below
50
℃
. Otherwise, the spraying of high-temperature coolant or steam
may cause personal injury!
5 Check the coolant level
Before the start of the cold season, check the concentration of the coolant. The coolant
should be able to operate at an ambient temperature of minus 20 degrees Celsius. If the
ambient temperature is lower, the amount of the antifreeze should be increased.
Radiator
(water tank)
cover
Radiator (water
tank)
Water
drain
valve