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1. Disassembly of the control valve assembly Run the engine at a low idle speed, operate the cylinder to the end of its stroke without overflowing the oil circuit, lower the working device to the g...
The traveling system is composed of traveling hydraulic motor, two-speed hydraulic motor regulating valve, parking brake, brake valve, traveling reducer (final transmission), etc. 1. Walking hydrau...
1. Hitachi excavator main hydraulic circuit The main hydraulic circuit is composed of a suction circuit, an output circuit, an oil return circuit and an oil discharge circuit. The structure diagram...
1. Rotary parking brake system When the front boom, forearm and other accessories are lifted off the ground when parking on a slope, if oil leaks in the rotating circuit, the upper structure may mo...
In today's society, whether it is subways, high-speed rails or trains, the routes they travel must pass through some tunnels in the middle. Everyone knows that there is no light in the tunnels ...
Rollover accidents of concrete pump trucks are now more common in construction. The most important reason is that the outriggers are not well laid. The construction site is rugged and uneven, and m...
Concrete is a building material, and the quality of concrete often determines the service life and quality of the building. How to control the quality of concrete? Concrete mix ratio is an importan...
