Most of the three-wheeled farm car rack just block the fuel pump inspection window or the oil limit bolt, which gives the pump removed from the engine or loaded with a lot of inconvenience, it is best to overhaul the fuel injection pump when the locomotive overhaul. However, usually only if the fuel pump failure will all the engine out, too mistakenly mistakenly. Here to talk about how to disassemble the fuel pump.
First turn off the oil switch, remove the fuel injection pump and the high-pressure tubing, unscrew the fuel pump 3 fastening nut. If it is I pump, you can easily remove the fuel pump. If it is A-type pump, you need to slowly move the throttle to remove the fuel pump; if you can not get out, you can tighten the pump 3 stud out, and then turn the pump back and forth the left hand, the right hand throttle , You can remove the fuel injection pump.
When the fuel pump is repaired and installed, the nameplate of the diesel engine should be removed first. If it is a type A pump, use your right hand to move the accelerator arm on the vertical axis of the governor and the left hand finger to touch the speed-regulating fork in the machine. When the fork-lift fork is aligned with the notch on the machine body, the right-hand fixed speed- , And then hold the hand pump has been tuned (rack in the middle position) to inject the fuel pump smoothly. Relatively speaking, I pump easy to remove, when installed is not so simple. First of all before loading the right hand to dial the speed arm back and forth, record the trip, and then let go, so that the throttle in a free position, the fuel pump plunger arm dial in the middle position into the machine. And then check the speed arm travel, if the trip is the same as the original, the plunger arm has been loaded into the speed fork; if the trip becomes smaller, that is not installed, the fuel pump should be removed to observe the position of the plunger arm, according to In the specific situation, it is determined that the plunger arm is turned to the position of a large throttle or a small throttle, and the piston arm is reloaded until the stroke of the plunger speed regulation arm is the same as before, and the fastening nut and the tubing are finally installed.
It should be noted that, no matter what type of fuel pump, installed inside the machine, with one hand to move the speed arm, and the other hand touch the fork does not move, it should not be installed inside the machine. This situation shows fork positioning pin off, or speed ball out of the slot, should be installed before troubleshooting.
Excavator Cylinder Piston Seals
Precautions for the installation of hydraulic cylinder piston seals in excavators
1. The sealing of the oil cylinder piston should use products of reliable quality to ensure good sealing performance.
2.Before installing the oil cylinder piston seal, the seal and sealing groove should be cleaned to ensure that the sealing surface is free of impurities.
3. When installing the seal, the correct installation sequence and direction should be carried out according to the drawing requirements to ensure the correct installation of the seal.
4.When installing the seal, special tools should be used to avoid using sharp tools and hard objects to damage the seal.
5. When installing the seal, attention should be paid to whether the seal groove is damaged or worn. If so, it should be replaced or repaired in a timely manner.
6. When installing the seal, an appropriate amount of lubricating oil should be applied to avoid friction damage to the seal during installation.
7.When installing the seal, it should be ensured that the compression of the sealing ring meets the requirements to avoid excessive or insufficient compression leading to seal failure.
8.After installing the seal, a sealing test should be conducted to ensure that the sealing performance meets the requirements.
Hydraulic cylinder piston seals, hydraulic cylinder seal, boom seal
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