5-18
Engine cooling system
Maintenance instruction
Check the coolant level ...................................................................................... every day or every 10 hours of operation
Check the status of rubber hoses and clamps..................................................... every day or every 10 hours of operation
Clean radiator fins ................................................................................................ every 500 hours of operation
Replace the coolant ............................................................................................. once each in spring and autumn
Check the coolant concentration ......................................................................... every day or every 10 hours of operation
1. Check the coolant level
Check the liquid level position of the coolant in the
radiator before starting the new machine, and check it
every day or every 10 hours thereafter.
Remove the radiator (water tank) cap and check the level
of the coolant.
If the engine is cold, the coolant level shall be between
the highest and lowest water levels of balance tank.
Observe the position of the coolant level in the balance
tank.
If the engine is cold, the coolant level shall be between
the highest and lowest water levels.
Warning: the hot coolant will spray out when the radiator cover is unscrewed. How to
unscrew the cover: After the system cools down, loosen the cover slightly and wait for the
pressure to be completely released. If you unscrew the cover very quickly, the coolant will
spray out, possibly causing personal injury.
2. Check the status of rubber hoses
and clamps
Check every 10 hours or every day.
Check the rubber hose. If it is cracked or hardened due to
aging, replace it with a new hose.
Check whether the hose clamp is locked tightly. If it is
loose or damaged, replace it in time.
Radiator cover
Radiator
Lowest water
level
Highest water
level
Balance tank
Summary of Contents for U27
Page 1: ...U27Hydraulic Excavator Instruction Manual Guangxi Yuchai Heavy Industry Co Ltd...
Page 5: ...1 1 Preface...
Page 17: ...2 1 Safety regulations...
Page 44: ...3 1 Parts introduction...
Page 49: ...3 6 Panel meter Oil level pointer Timing display Water temperature pointer Indicator area...
Page 55: ...4 1 Operation guide...
Page 89: ...5 1 Maintenance...
Page 130: ...6 1 Accessories guide...