If it descends naturally from the excavation, check and determine whether the cylinder sealing ring is damaged or whether the main valve has internal leakage.
1. Check the cylinder seal.
Check the boom and bucket cylinders.
① Adjust to the state when measuring natural descent, and turn off the engine. The excavator shall be repaired in a firm, flat and less dangerous environment; The shovel teeth shall be on the ground; Stop the engine and remove the key; Safety measures such as block shall be taken for crawler.
2. The operation control of the mobile arm control lever is in the lifting position or the main valve fails.
Check the bucket barrel. Solid, flat and low risk environment shall be selected for inspection and maintenance of excavator; The shovel teeth shall be on the ground; Stop the engine and remove the key; The crawler machine shall only adopt the safety measures of blocking. From the appearance, the excavator maintenance consists of three parts: working device, upper turntable and traveling mechanism. According to its structure and application, it can be divided into crawler, tire, crawler, full hydraulic, semi hydraulic, full rotation, non full rotation, general type, special type, hinge type, telescopic arm type, etc.
① When the boom cylinder is fully retracted, the engine stalls.
Do not operate the lever to the stick digging position (about 95 >; charge the accumulator).
1: Feel free to use butter.
2: Install new cylinder liner and piston 名媛直播 without selection.
3: Do not check the piston stroke allowance.
4: When measuring the cylinder clearance, it is impossible to measure the piston skirt perpendicular to the piston pin hole, nor other directions.
5: Do not heat the piston with an open flame. The repair materials of modern excavators are mainly soil, coal, silt and pre loosened earth rock. With the development of construction machinery in recent years, the development of excavator repair is fast. Excavator repair has become one of the most important construction machinery in engineering construction. The three most important parameters for excavator maintenance are: working weight, engine power and bucket capacity.
6: Avoid grinding the bearing with abrasive cloth.
7: Do not tighten the bolts too tightly.
8: Don't blow the forum too much.
9: Do not add cold water to the water tank.
10: Change the oil frequently.
If the engine stalls automatically after the above points are completed, we can first check that the transmission shaft of the engine fuel pump is not broken.
Check the engine idle spring assembly, oil pipe and valve drive rod.
Generally, the failure phenomenon of excavator repair and trailer is caused by the hydraulic pressure of excavator repair.
