The left brake of the Xuanhua 165 bulldozer failed

1. Analysis of possible causes.

1. It is the lack of necessary maintenance of the brake system, there are too many impurities in the brake master cylinder, the sealing is not tight, the vacuum booster pump fails, the brake oil is too dirty or the air resistance occurs after the mixing of several brake oils after heating, the brake master cylinder or sub-cylinder leaks, and the air leakage of the gas tank or pipeline interface;

2. It is due to improper operation that causes the failure of the parts;

3. Due to serious overload, under the action of gravitational acceleration, the inertia of vehicle movement is increased, which directly leads to brake failure.

Second, the treatment method.

1. Control the direction according to the road conditions and speed, disengage the high-speed gear, and at the same time quickly blast the empty fuel and shift the high-speed gear into the low-speed gear. In this way, the engine will have a lot of traction resistance and the speed of the vehicle will be reduced rapidly. In addition, the handbrake should be used in conjunction with the low-speed gear shift, but it should be noted that the handbrake should not be tightened or pulled too slowly.

If it is pulled too tightly, it is easy to make the brake disc "lock", and it is likely to damage the transmission parts and lose the braking ability; If it is pulled too slowly, the brake disc will wear and ablate and lose its braking effect.

2. Use the bumper, carriage and other rigid parts of the car to rub and collide with natural obstacles (rocks, trees or soil slopes) on the side of the road to achieve the purpose of forcibly stopping and getting out of danger, and reduce the accident loss as much as possible.

3. If the brake fails when going uphill, it should be reduced to medium and low gear in time to maintain sufficient power to drive uphill to the top of the slope and stop. If you need to park on a half-slope, you should keep the forward low gear, tighten the hand brake, and the personnel with the vehicle should use stones, skids and other objects to jam the wheels in time. If there is a backward slippage, the rear of the car should face the hillside or the safety side, and the headlights and emergency lights should be turned on to attract the attention of the vehicles in front and behind.

4. When the downhill brake fails and the speed of the vehicle cannot be controlled by the mechanism of the vehicle itself, the driver should decisively use natural obstacles, such as rocks and trees on the side of the road, to cause resistance to the car. If you can't find a suitable terrain or object to use for a while, in an emergency, you can move one side of the car closer to the side of the mountain, and gradually reduce the speed of the vehicle by rubbing to increase the resistance.

5. The vehicle should step on the brakes when going down a long slope or a steep slope, regardless of whether there is a situation or not. It can not only test the performance of the brakes, but also buy time to control the speed of the vehicle when the brakes are found to be out of order, also known as predictive braking.

3. Preventive measures.

Do not ignore the daily maintenance of the brake system, in order to prevent the occurrence of brake failure, please maintain the brake system in time, regular maintenance and overhaul is essential, for the safety of life, you must not ignore the regular maintenance.

Note: Check whether the brake shoes are in good condition, and do not overuse the brakes, hang the low gear when going downhill, use the brake of the engine to let the car drive, supplemented by the foot brake; Avoid severe overloading to prevent brake failure.

What to do if the bulldozer brakes fail.

Oil leakage from the left wheel brake cylinder.

It is estimated that there is a fastened large nut in the steering assembly in the rear axle that is loose or falling, resulting in the steering cylinder seal ring coming out, and the pressure oil leaks from here during steering, so that the oil volume of the walking system is insufficient and cannot walk. The diesel tank needs to be removed, the steering system on the faulty side needs to be disassembled, the nut is secured, and the fault is eliminated.

I don't know which manufacturer's 165 bulldozer you're looking for.

Shantui is the T160 ** and Shanghai Pengpu** is not much different from Qingshen.

Shanghai Pengpu is pd165Y-2 **Between 63-650,000 The main reason is that the engine is different, the Cummins engine is 10,000 yuan more expensive than the engine of Shangchai, and there are some other options.

I am answering for you according to the experience of the excavator I don't know if it is accurate Walking weakness can be divided into several points The drive wheel gear is seriously worn You can see if the teeth are too small and too small If it is, it will be replaced There is also the gear oil may not be replaced in time for a long time The big problem is these two.

More than 90% of the oil leakage is caused by the corrosion and aging of the oil seal. Especially for cars that are more than three years old. Because the rubber seal will lose the plasticizer due to the influence of the temperature change of cold and warm for a long time, the consequence is that the seal shrinks and hardens and loses elasticity, and even breaks seriously (this degree is far from reaching, and oil leakage will be found during maintenance), and the problem of oil leakage is inevitable.

This problem is not recommended for dismantling and repairing, and it can range from hundreds to thousands or even tens of thousands at a time. But it may not solve the problem and hurt the car. It is recommended that the majority of car owners and friends use the method of "solving car oil leakage without dismantling and repairing" to solve car problems without dismantling and repairing.

The operation of the 165 bulldozer is very simple, the throttle is reversed, that is, stepping on the small throttle, and refueling when loosened is to refuel, the process is as follows: start the engine (step on the throttle) close to the seat is to move forward when the 123rd gear, pull to the first gear and slowly release the foot throttle, the bulldozer will go forward and step on the throttle, the bulldozer will stop, continuously variable speed. Very simple.

I don't know which manufacturer's 165 bulldozer you're looking for.

Shantui is the T160 type**, which is similar to that of Shanghai Pengpu**.

Shanghai Pengpu is PD165Y-2 **Between 63-650,000 The main reason is that the engine is different, the engine of Cummins is 10,000 yuan more expensive than the engine of Shangchai, and there are some other options.

1. The cooling water in the engine water tank reaches the boiling point, and produces a large amount of water vapor, which will produce a large number of bubbles, and a part of the cooling system is occupied by bubbles, which will make the cylinder wall around the serious water deficit, so that the engine lacks cooling, and will reduce the strength of the piston, piston ring, connecting rod and other components, and even deform, and can not bear the normal load, and at the same time, it will also destroy the normal gap between the parts, so that the normal oil film can not be maintained between the parts, and the engine will pull the cylinder and pull the swag. In other cases, the entire engine can be damaged or even scrapped.

2. Selection of antifreeze: the freezing point of antifreeze is 10 lower than the minimum temperature in winter in the place of residence. The mainstream brand products of antifreeze are basically 40-60 yuan a barrel, with a capacity of 4 liters (the volume of the general car water tank is almost 4L).

The ** of the original concentrated antifreeze may be slightly more expensive, generally about 80 yuan a bottle, and the capacity is about that. When replacing the antifreeze, it is necessary to add it in proportion, and in general, the ratio of antifreeze to water is 1:1 or 1:

A ratio of 2 is sufficient.

3. The replacement cycle and replacement method of antifreeze.

The recommended replacement cycle of the original antifreeze will vary from manufacturer to manufacturer, but the vast majority of them recommend that car owners replace the vehicle antifreeze every 2 years, and some manufacturers show that their original antifreeze replacement cycle is 4 or 5 years. But no matter what, in short, it has to be replaced, which is nothing more than the length of the replacement cycle.

4. When replacing the antifreeze, the first and most important thing is to wait for the vehicle to cool down, and do not replace the antifreeze when the engine is at a high temperature. First, there will be a risk of burns, and secondly, the release of antifreeze during the "hot car" will also affect the cooling of the vehicle.

5. When filling with new antifreeze, you can directly pour about about (depending on the model) of antifreeze into the storage tank, and stop filling after the liquid level height reaches the upper limit max position. At this time, unscrew the drain screw next to the "water pipe", and continue to start filling the antifreeze, see the antifreeze gushing out of the drain screw continuously and without bubbles, and then tighten the drain screw, so far the first time to fill the antifreeze and release the air The work is basically completed.

After starting the vehicle, idle for 3-5 minutes to let the vehicle enter the normal working temperature, and make the new antifreeze can be fully circulated in the waterway in the car, and then turn off the engine, open the reservoir will find that the liquid level height has decreased, then only need to add an appropriate amount of antifreeze to keep the liquid level between max and min.