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4. Exhaust the air in the hydraulic system
A. Exhaust the air in the pump
1) Loosen the exhaust screw plug in the exhaust port, and check whether there is oil flowing
out. The exhaust is completed.
2) Tighten the screw plug after the exhaust is completed.
Note: If the pump is operated if the pump is not full of oil, it will be abnormally heated
and cause premature damage to the pump.
B. Discharge the air between the pump and the hydraulic oil tank
1) Start the engine and keep it running at medium and low speeds.
2) Operate the working device slowly for about 5 minutes to exhaust air.
Note: If the air between the pump and the fuel tank is not discharged to allow the
engine to run at a high speed, it will also cause the pump to be heated and damage
the pump.
C. Discharge the air in the oil cylinder
1) At low engine speed, extend and retract the oil cylinder to the position about 100mm from
the stroke end for 4-5 times. (Be careful not to extend or retract to the stroke end).
.
2) Then, operate each cylinder to the end of its stroke 3 to 4 times.
3) Finally, operate each cylinder to the end of its stroke 4~5 times to completely exhaust the
air.
Note: If the engine is operated at high speed or the oil cylinder is operated to the end
of the stroke immediately after starting the machine, the air in the oil cylinder will
damage the piston seal and damage the oil cylinder.
D. Discharge the air in the swing motor (when the oil in the housing of the swing
motor is discharged)
Note: During the exhaust, the machine cannot be rotated under any circumstances.
1) Run the engine at idle speed, loosen the exhaust plug, and check whether the oil flows
out from the exhaust plug.
2) If there is no oil flowing out, remove the exhaust plug and fill the motor housing with
hydraulic oil.
3) After the exhaust is completed, tighten the exhaust plug.
4) Finally, run the engine at a low idle speed and slowly turn the upper part of the car body
left and right at least twice. So that the air is completely exhausted.
Note: If the air in the motor is not exhausted, the bearings of the swing motor may be
damaged.
Summary of Contents for U35
Page 5: ...1 1 1 Preface...
Page 15: ...2 1 2 Safety regulations...
Page 45: ...3 1 3 Introduction of components...
Page 70: ...4 1 4 Operation guide...
Page 90: ...4 21 6 After the engine shuts down reset the shutdown lever...
Page 104: ...5 1 5 Maintenance...
Page 147: ...6 1 6 Accessories guide...