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5-27
2. Remove the water and dirt from the hydraulic oil
tank
Drain the water and dirt from the hydraulic oil tank every
250 hours.
1) After stopping the machine until the oil temperature
drops or before starting work every day, discharge the air
from the oil tank.
2) Slowly loosen the drain valve or the drain plug at the
bottom of the fuel tank (as shown in the figure).
3) Drain water or dirt until the clear and clear hydraulic oil
is discharged. Close the drain valve again or tighten the
screw plug.
4) Fill oil if the oil in the oil tank is insufficient.
3. Change the hydraulic oil and clean the oil suction screen
See Fig. 5-31 for changing the hydraulic oil.
Warning: 1) In order to avoid burns, drain the oil only after the hydraulic oil has cooled down or the
oil is cold before daily work.
2) During removing the oil filler flange cover, in order to prevent the oil from spraying out,
slowly turn the cover to release the internal pressure.
3) During replacing the oil, be careful not to let water, dirt, sand, etc. enter the oil tank.
Clean the oil tank
1) Drain the hydraulic oil when the hydraulic oil is hot.
2) Fully extend the piston rod of the hydraulic cylinder.
3) Stop the engine.
4) Remove bolts 1, cover 3, and washer 4.
5) Remove the screen 5 when the hydraulic oil tank is
drained.
6) Carefully clean the filter screen and reinstall it.
7) Reinstall the drain plug.
8) Fill the hydraulic oil to the maximum level.
9) Operate the engine.
10) Extend and retract each cylinder of the excavating
device.
11) Extend the piston rod of the hydraulic cylinder.
12) Fill the oil tank to the highest oil level.
13) Close the oil tank again to make the engine work.
Air filter (fuel filler port)
Oil return filt
er
Oil drain
seat
Oil suction
filter
Hydraulic
oil dipstick
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...