After long-term use of agricultural machinery, there will inevitably be problems such as loose parts. It is very important for agricultural machinery operators to develop good maintenance habits. Moreover, any machinery will always have some failures after use. How to identify the common failures of the tractor is very important for the maintenance of the tractor. A tractor driver not only needs to be able to identify faults, but also needs to have the skills to repair and troubleshoot.

1. High pressure oil pipe is worn out and leaks oil　

If the connection between the protruding head of the tractor's high-pressure oil pipe and the fuel injector and the oil outlet valve is worn and leaked, you can cut a round copper sheet from the waste cylinder gasket and tie a small hole in the middle of the grinding pad between the convex pits. Solve the urgent need.

2. Sudden fuel shortage

Insufficient fuel supply during tractor operation, such as exhausting air, replacing the plunger, and the fuel injection nozzle, is still not effective, that is, the small steel ball in the fuel injection needle ejector rod of the fuel injector is eccentrically worn and the fuel injection cannot be atomized. At this time, a small steel ball should be replaced or a bicycle flywheel steel ball should be used instead.

3. Steering wheel shaking, front wheel swinging

The phenomenon of steering wheel shaking and front wheel shaking is mainly caused by improper positioning of the front wheel and the too small caster angle of the kingpin. In the absence of instrument testing, try to plug a wedge-shaped iron plate at the rear end of the leaf spring and the front axle support plane to make the front axle rotate backward and increase the caster angle of the kingpin to return to normal after trial operation.

4. Automatically skip gears after shifting

The phenomenon of automatic gear skipping after shifting in tractor operation is mainly caused by the wear of the fork shaft groove, the weakening of the fork spring, and the excessive gap between the connecting rod joints. At this time, it is necessary to repair the positioning groove, replace the fork spring, and reduce the gap of the connecting rod joint to ensure the normal speed change.

5. Poor oil pump performance

To solve the problem of poor performance of the oil pump after overhaul or overhaul, the oil pump does not come up when the locomotive is started for the first time. The oil filter or oil outlet pipe can be removed and then filled with oil from the oil outlet of the engine body with an oiler. When the indicator oil pipe is activated, the oil will be pumped up.

6. Fatigue breakage of hydraulic tubing

Due to frequent oil pressure changes and high oil temperature, hydraulic oil pipes are prone to fatigue and breakage and cause accidents due to frequent slackening of the pipe wall. In order to effectively extend the service life of the hydraulic oil pipe, it is best to use thin iron wire to be fired into a spring shape and put into the oil pipe for support.

7. Hydraulic brake locomotive brake failure

Carefully check the brake master cylinder and the sub-cylinder to see if the brake fluid has been replaced on time and the air in the brake pipeline has been completely exhausted, and the brake pedal is in compliance with the scientific height.

8. Diesel engine burns oil and emits blue smoke

Check whether the cylinder liner piston assembly is worn, whether the elasticity of the piston ring is weakened, whether the oil pan is added excessively, whether the oil level of the air filter is too high, etc. After solving the cause, if the blue smoke is still emitted, pay attention to check the cooperation of the valve rod and the valve guide Whether the gap is too large is a potential cause.

9. Excessive scale causes the engine temperature to be too high

Excessive water scale on the engine cooling pump will cause the engine temperature to be too high and accelerate the wear of the parts and reduce the power consumption of the lubricating pump oil. The elimination method is: select 2 large loofahs, remove the skin and seeds, clean them, put them in the water tank and replace them regularly to remove the scale. The water in the water tank should not be changed frequently. This will increase the formation of scale.

There are many specific methods for tractor failure analysis, inspection, diagnosis, and judgment. In short, the principles of failure analysis and inspection methods should be used flexibly, specific failures should be analyzed in detail, and the mechanism of the machine should be contacted to find out the signs of failure. Adhering to the principle of “from the outside to the inside, from simple to complex”, try to minimize disassembly, do not blindly dismantle and dismantle, and rough dismantling, in practice, strengthen our experience in discovering, analyzing, judging, and troubleshooting in time. ability.