The tractor broken waist maintenance tutorial teaches you to master the most difficult maintenance technology

For medium-sized tractors, the failure rate of waist breaking maintenance is about 9.3% due to engine problems (such as replacing the crankshaft rear oil seal), clutch (such as replacing the auxiliary friction plate), gearbox (such as replacing the first shaft oil seal, gear, housing, etc.) and rear axle failure (such as replacing the central drive driving and passive arc gears, rear axle housing, etc.), For the above reasons, the failure rate of large tractors requiring broken waist maintenance has reached about 11.3%. The amount of broken waist maintenance for tractors is still relatively large. What should we pay attention to in the operation of broken waist maintenance? What can be done to ensure that the broken waist maintenance of the tractor can be completed safely and quickly?

Tractor broken waist maintenance tutorial
Let's take the commonly used 1204 tractor as an example to introduce the operation process of replacing the clutch with the broken waist of the tractor (there are some differences between different models):
1、 First of all, choose a relatively open, flat and hard ground, preferably cement ground, and park the tractor on the selected ground. In principle, try to avoid directly breaking the waist in the field for maintenance. Various conditions are not available and the safety is poor. If it is necessary to break the waist in the field for maintenance, one should be considerate Do the safety work carefully.
2、 After stopping the tractor, turn it in the right direction, turn off the engine, and fix the front and rear weirs of the rear wheels with skids. The front wheels do not need to be fixed temporarily because the waist needs to be broken.

3、 Firmly support the "U" frame under the tractor gearbox with a mobile jack, and squeeze both sides of the front axle swing shaft with skids (it is mainly to prevent the engine from rotating left and right after disconnecting the waist; if you forget to cushion it, the engine will turn and tilt to one side after disconnecting the waist of the tractor. At this time, don't panic and fear, because the angle at which the engine can swing on the swing shaft is not very large, and it will be stuck and stopped after a slight rotation.) , so that the engine can not swing left and right, and firmly support it with a mobile jack under the engine.
4、 Remove the battery grounding wire to ensure the safety of the circuit.
5、 Do a good job of tractor oil drainage, remove all kinds of tractor oil pipes (pressure oil pipe of elevator, oil suction pipe of gear pump, steering oil pipe, fuel pipe of main and auxiliary oil tank, etc.), pull wires, disconnect electrical harnesses such as headlight linear speed and engine harness, and fix the hood, etc.
6、 Remove the fixing bolts and other accessories between the transmission and the engine.
7、 Before removing the connecting bolts between the gearbox and the engine and preparing to disconnect the waist, be sure to check and confirm the support position and confirm that the support of each part is firm. In order to ensure safety, wooden piers should be placed under the engine and the gearbox in advance (safety protection measures to prevent jack failure) Before the waist can be broken, disconnect the engine gearbox. When disconnecting, slowly push the engine straight ahead, and pay attention not to skew as much as possible.
8、 After the tractor is disconnected from the waist and the engine is moved forward to the required position, the wooden pier shall be padded and firmly supported under the engine. After confirming that the engine and swing shaft are firmly supported, the clutch shall be removed for maintenance and replacement.
Nine. When repairing and replacing the clutch and adjusting it, and when it is ready to close, confirm the swing shaft and the mobile jack support at the bottom of the engine. If it is confirmed, unscrew the wood piers below the engine, push the engine forward to the gearbox, adjust and maintain the center line of the engine clutch hole in a straight line, do not skew. Firstly, align the spline hole of the positive clutch with the spline of the first shaft and auxiliary clutch shaft, and then push the engine directly behind. In case of clamping stagnation, push the engine backward and gently shake the engine until it is completely closed. If the clamping lag cannot be completely and smoothly closed together during closing, it must be disconnected again, rechecked and adjusted, and then closed again until it can be completely and smoothly closed Do not forcibly use bolts to connect and close together, which may cause damage to clutch and other components.
10、 After closing, install the connecting bolts between the engine flywheel housing and the gearbox, tighten them according to the specified torque, and connect various oil pipes, cables, lines, hood gas springs and other accessories.
11、 Check the connection of each part. After confirming that the connection is firm and correct, remove the jack and wooden pier under the engine and gearbox.
12、 Refuel, install the negative grounding wire of the battery, test run after confirming that all parts are correct, and hand it over to the user for operation after confirming that all parts operate normally.

For professional maintenance personnel, they will also make special tractor waist breaking tooling. With the special waist breaking tooling, the safety and efficiency of waist breaking maintenance will be greatly improved, but we still hope that there will be fewer and fewer waist breaking faults of tractors.