Lu Hongliang Jinyun County Agricultural Machinery Management Station adopts the 130-pharynx brake system. Double line hydraulic wheel brake.
0 The failure of the brake system will endanger the safety of pedestrians and drivers, so the operational reliability and safety of the brake system must be inherited. This paper mainly introduces some methods for rapid diagnosis and hyun repair when the hydraulic brake system of the hand-held transporter has a brake failure or the like.
Tap the brake pedal with your toes. If the pedal is moved to the timing of 23, the brake resistance is felt, indicating that the pedal is too free, or the gap between the brake shoe and the brake drum is too large. Should be adjusted.
If the brake pedal can be stepped to the end without resistance. And even when I step on a few feet, I still feel that it is especially resistant. The pedal position also cannot be raised.
It is said that there is a lack of brake fluid in the master cylinder, or that the reservoir lid is clogged, or the brake cup is ruptured. Brake fluid should be added to the tank, the vent hole should be removed, and the brake cup should be replaced. The threaded connection accounts for a large proportion in various mechanical connections. Because the threaded connection is not only simple and reliable, but also adjustable, it can be disassembled multiple times without replacement, and some people think.
The assembly of the threaded connection is quite simple, but in practice there are many questions. In the assembly of the threaded connection, the correct assembly method is used. The use of a suitable tool and the application of the six corners of the fixed nut nut causes the wrench to slip and cannot be tightened. Excessive tightening forces will break the bolts. If the tightening force is too small, the pressing force of the bolt will be insufficient and the connection will not be strong.
Do not use a large adjustable wrench to tighten small bolts or small nuts like a wrench. Press the applicable Screw. If the brake pedal can pedal to the end, squatting after a few steps, feel the pedal position rises, the line becomes smaller, and the interval is asked. When the time is stepped on the pedal again, the pedal can be stepped on. This indicates that the brake pipe output is too low, which may be due to aging deterioration of the brake cup. The return valve is not tightly sealed. The piston and cylinder wall of the master cylinder or sub-pump are too large due to wear clearance. The brake cup piston should be replaced. Clean the return valve.
If the free-stroke stroke is small when the brake pedal is quickly depressed, the brake is effective, and when the brake pedal is slowly depressed. If the free stroke is large and the brake is invalid, the brake master cylinder is worn. When braking the pedal down the road slowly.
The brake fluid flows through the wear and the piston chamber. The master pump skin should be replaced.
Press the brake pedal hard and keep the braking force unsatisfactory. At this time, if you feel the pedal river continues to sink to 7. It shows the leakage of 6 in the brake pipe.检查 Check that the brake pipe has a special bolt. The size of the nut and the wrench can be made to properly tighten the threaded connection without causing the torque to be too large and causing the bolt to be broken. When tightening ordinary bolts, avoid using large adjustable wrenches to tighten small bolts or small nuts. Otherwise, it is not only easy to round the six corners of the bolt head nut, but also because the handle of the large active wrench is long, the tightening torque will easily exceed the bolt when pulling, and the bolt and nut should not be tightened on the wrench. 3. Gradually tighten in the order they are set.
Crack, pipe joints are not loose; then check the master pump push rod dust jacket and wheel brakes for brake fluid leakage. If there is, it means that the master pump or the sub-pump cup is aging or rupture, and should be replaced; if the brake pedal is pressed, it feels soft and elastic. It means that the brake fluid is leaking. The pipe joint should be tightened. Exhaust as required.
7 If the brake pedal is depressed, the pedal feels very hard. I can't walk. This indicates that the brake fluid is too arrogant, or the inside of the pipeline is too thick, or the brake fluid is impure, and the brake master cylinder and the split chest are swollen and deformed to cause seizure.
The brake fluid and brake cup should be replaced. Clean the brake line.
3 Release the brake pedal and release it. If the pedal does not, it will be in place. It means that the brake master cylinder return valve or oil return hole is blocked; if the master pump is accompanied by a squeaking sound, the total 51 skins are stepped over, should be newly assembled or replaced.
Some parts are connected by a lot of bolts, such as the cylinder head cover. For the assembly of these bolts, in addition to the above-mentioned original, it must be tightened step by step in a fixed order, otherwise it will easily cause the cylinder head or cover plate, etc. For these parts, the bolts and nuts in the middle of the parts are first screwed up, and then Tighten the bolts and nuts alternately or diagonally on both sides. At the same time, the bolts and nuts must be tightened step by step, that is, the bolts and nuts are first tightened to the 3 tightness in the first pass, and then fully tightened in the first pass.
Chen Xiaoshu
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