Recently, enter the hottest dog days of the year, the surface temperature reaches 40 °, in such hot weather and do not forget to engineering machinery maintenance problems in the job, and today we come together to share backhoe loaders in the summer heat Notes environment job:
1, operating techniques
First, make sure that the situation around. When the backhoe swing operation, around obstacles, terrain to be aware of safe operation; the job, make sure the front and rear direction of the track, to avoid tipping or impact; try not to make the final drive face excavation direction, otherwise Walking is easy to damage the motor or hoses; the job, to ensure that the left and right track in full contact with the ground, improve the dynamic stability of the machine.
2, the effective mining methods
When between Backhoe bucket cylinder and linkage, the arm cylinder and the arm each 90 degrees, the maximum digging force; Bucket teeth and the ground to maintain a 30 degree angle, the best cut in the soil digging force of least resistance ; when digging arm, should ensure arm angle in the range of angles from the front to the back of 30 degrees 45 degrees. Using both boom and bucket, can improve the efficiency of mining.
3, mining rock
Use bucket digging rocks would cause greater damage to the machine, shall be avoided; when you must dig, should be based on the rock of crack direction to adjust the position of the body, smooth shovel into the bucket, excavation; insertion of the bucket teeth crevices in mining (bucket should carefully slip teeth) with a stick and bucket digging force; and not fractured rock, re-use should be broken bucket digging.
4, the slope smooth operation
Planar trimming machine should be flat on the ground, preventing the body shaking, motor coordination to grasp the boom and arm, the control of both the speed of the plane trimmed crucial.
5, the loading operation
Backhoe level body should be in a stable position, otherwise it is difficult to accurately control the rotary unloading, thereby extending the operating cycle time; the body and the truck to keep an appropriate distance, to prevent rotation of 180 degrees when the rear body and truck collide; try turning counterclockwise loaded On doing so broad vision, high efficiency, while correctly grasp the rotation angle, in order to reduce the time for rotation; excavator truck position lower than the forest in order to shorten the boom lifting time, and the line of sight is good; the first load of sand, gravel, then place large stones, thus reducing the impact on the wagons.
6, soft water areas or jobs
When soft soil with job, they should understand the real extent of the soil loose and be taken to limit the scope of the bucket excavation, to prevent landslides, landslides and other incidents as well as the body deep subsidence.
When operating in the water, should pay attention to the body to allow the water depth (water should be at the center of care sprocket or less); if the water level is high, slewing ring will cause water to enter the internal cause poor lubrication, engine fan blades hit by water leads to fold damage, electrical circuit components due to water intrusion short circuit or open circuit.
7, lifting operations
Acting hydraulic excavator lifting operation proceeds, should confirm the lifting around Live, using high-strength hook and wire rope hoists, to try to use special lifting equipment when lifting; practices should select micro mode of operation, action to slow balance; sling length appropriate long will swing hanging objects large and difficult to precisely control; to correctly adjust the bucket position to prevent slippage steel rope; construction workers try not to close to lifting objects, in order to prevent the risk of improper operation occurs.
8, smooth operation method
When the backhoe work, stability of the machine can not only improve efficiency, extend machine life, and to ensure safe operation (the machine on relatively flat ground); the drive sprocket ratio on the front side of the stability of the rear side Well, and it can prevent final drive subjected to external impact; track wheelbase on the ground is always greater than the tread, so forward work stability, to avoid lateral operation; to maintain the excavations close to the machine, in order to improve stability and excavators; if mining point away from the machine, causing the center of gravity forward because the job is unstable; worse than the forward lateral stability mining excavation, if the mining center point away from the body, the machine will be more unstable, excavations and the body center It should maintain an appropriate distance to allow balancing operations efficient.
9, it is worth noting that the operation
Backhoe cylinder with internal buffer means capable of gradually releasing the back pressure in the near end of the stroke; if subjected to impact load after reaching end of stroke, the piston will directly hit the cylinder head or cylinder bottom, likely to cause an accident, so that by the end of stroke We should try to leave a clearance.
Use rotary operation of dozing will cause abnormal stress bucket and the working device, causing distortion or weld cracking, and even pin broken, you should try to avoid such action.
The use of the body weight of the excavation will cause abnormal stress slewing ring state, while the chassis will produce a strong vibration and shock, so the application of hydraulic cylinders or hydraulic lines facilitate greater damage.
When rocks and other heavy material handling, should be near the bottom of the truck bed discharge, or to load soil, then loaded rock, prohibit aerial unloading to reduce impact damage to the truck.
Track deeper into the mud, the bottom of the bucket underlying piece of wood, use a bucket of support from the track, then mat board at tracks, pulled out of the machine.
10, the right traveling operation
When the excavator, working equipment should be put away and close to the center of the body, in order to maintain stability; the final drive on the back to protect the final drive.
To avoid as much as possible to pass through obstacles such as stumps and rocks to prevent twisting track; if you must pass through an obstacle, you should make sure that the obstacle on the track center.
Crossing the mound, always prop chassis with a working device, in order to prevent the body shaking or tilting.
Should avoid prolonged idling stop on the steep slopes of the engine, otherwise they will change the angle of the oil level and lead to poor lubrication.
Machine to walk long distances, make final drive rollers and internal rotation to produce high temperature for a long time, oil viscosity decreases and poor lubrication, therefore should always stop to cool down, to extend the life of the lower body.
Prohibition against the driving force of excavation work carried out walking, or excessive load will lead to early final drive, get off track and other parts of wear or damage.
When walking uphill, it should drive wheels after touchdown track to increase adhesion.
When walking downhill, it should drive wheels in front, the upper track tension to prevent stopping the vehicle slip forward under the force of gravity and dangerous.
When walking on the ramp, equipment should be placed in front to ensure security, parking, and gently put the bucket into the ground, and the stopper on the track decentralization.
When walking the steep turn, it should slow down, turn left, turn left back when track, turning the right track turn right back, which can reduce the risk of turning pro on the slopes when.
11, correct crushing
First make vertical Backhoe hammer on the object to be crushed. At the start of crushing, lift the front of the vehicle about 5cm, crushing, crushing head should have been pressed on the broken material, not broken was broken operation has to be stopped immediately after being broken.
When broken, the vibration hammer will gradually change direction, it should be ready to adjust the bucket cylinder, so that the hammer perpendicular to the broken surfaces.
When the backhoe hammer hit into detritus, broken position should change; in what place sustained broken not more than one minute, otherwise it will damage not only the hammer, and the oil temperature rises abnormally; for hard objects, should edge He began to break.
Prohibited under the swing broken hammer inserted after twisting, horizontal or upward hydraulic hammer hydraulic hammer and chisel when available.
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