Installation of oil seal and sealing pad for Chinese tractor front end loader and matters of attention
The installation and disassembly of a loading machine parts requirements, here tells the loader seal disassembly, loading gasket and gasket disassembly requirements, also talked about the requirements of assembly and part of loader brake booster and brake pump in the assembly should pay attention to the problem.
The requirements for the disassembly and disassembly of the oil seal of the loader:
1. when installing and loading the oil seal, the oil seal lip should be placed on the required side, and no reverse loading should be made. Loading oil seal lip should be placed into Yirui angle, in order to meet the needs of oil seal. Therefore, when the oil seal is disassembled and loaded, it must be treated carefully and carefully, and the lip must not be damaged. The oil seal should be lubricated before the seal is pressed into the oil seal. Otherwise, the oil seal of the loader may be rubbed out because of the friction of the dry friction surface at the beginning of the work.
2., the correct way of installation is to slide the oil seal into the seat with a tube. If there is no such catheter, a pipe can be made temporarily by using brass slices, and when there is a keyway or shoulder on the shaft, it is more necessary to use a catheter. Special tools must be used to make the pressure evenly placed on the end of the oil seal when the oil seal is loaded and loaded. The diameter of the pressure mounted oil seal tool should be 0.5-1.0mm smaller than the seat hole. Its free end should have a shape suitable for hammering. The shaft surface of the oil seal should be smooth and no scratch and scratch are available. In this way, the installation of the oil seal of the loader is basically completed.
The requirements for the disassembly and dismantling of classified gaskets and pads:
1. the copper liner removed from the loader should not be reused. If this type of pad is in good condition, it can be reused after annealing. Paper pads, pads, seal pads and so on can not be reused.
The 2. leather liner should be immersed in the lubricating oil before installation, so that it can be softened and then installed. Do not damage the surface of the O and V - shaped seals, and do not allow the wire to be wound on the surface of the seal. When installing and loading the classified cushion, the two sides of the seal should be coated with binder.
Assembly requirements for the brake part of the loader:
The 1. air compressor should ensure that when the engine speed is 2000r/min, the pressure of the air tank in 15min should reach 686kPa and the volume of the exhaust is 135-142L/min.
All parts of the 2. air road shall not leak, and the piping arrangement is uniform. Pipe filled and fixed firmly between pipe and pipe is not mutual friction and collision.
The air pressure of the 3. gas path should be kept at 784-882kPa. When the gas pump does not exhaust, the pressure of the gas tank is 882kPa, and the pressure drop can not exceed 9.8kPa in 5min.
The assembly of the adding force and the brake sub pump should be paid attention to:
1. before assembly, all parts should be cleaned, especially the total hydraulic pump and the sub pump. Because rubber seals are easily corroded by mineral oil, it is not used for cleaning gasoline or diesel oil, and alcohol cleaning is used in order to prevent the damage of rubber parts.
2. after assembly, the air brake chamber, the hydraulic brake master cylinder and the sub pump should be mobile and flexible. When pushing or pulling the pump push rods, the piston shall be able to reset flexibly, and the stroke of the piston should be enough.
The main item of the 3. loading device inspection is the effect of increasing force and the sealing. The effect of reinforcement of ZL50 loader brake booster for brake chamber when the pressure is 588kPa, hydraulic booster exit should be 147kPa. The sealing test includes two parts: the air pressure seal and the oil pressure seal. It mainly depends on the pressure drop rate of the gas chamber and the oil chamber after a certain time under certain pressure.
When the sub pump is tested, the sub pump will be attached to the rear of the afterburner and the dynamometer is connected after the sub pump. The requirements of the sub pump inspection: one is the thrust of the pump, and the two is the sealing performance of the pump.