During the operation of the mucking loader, its operation efficiency is often affected by the failure of the transmission system. Now, some typical faults and troubleshooting methods of the mucking loader transmission system are introduced as follows for the reference of the colleagues.
1. The first gear and reverse gear are normal, and the second gear has no driving force.
First check whether the shifting lever is in place, if it is not in place, readjust it. Then check whether the transmission pressure gauge is depressurized in the second gear position. If depressurization, you must check whether there is pressure oil flowing out of the periphery of the 8-shaped end cover of the gearbox. If there is leakage, you can tighten the surrounding bolts. The above method still cannot eliminate the fault, you must remove the figure-eight end cover, and replace the o-ring and paper gasket. If there is no pressure oil overflow at this time, it proves that there is a problem with the second gear member in the gearbox, and the second gear member must be removed. First check whether the external oil seal of the second gear is damaged, then disassemble the components of the second gear, take out the piston, and check whether the piston ring, oil seal ring and friction plate are damaged. Finally, check whether the guide pin in the second gear oil cylinder falls off. If the guide pin falls off, a large amount of pressure oil in the second gear will flow out from here, causing the pressure in the second gear to decrease and driving cannot be performed. For reasons of pressure drop, replace seals or repair or replace parts.
2. The speed change pressure, boom, bucket and steering are all normal, but the slag loader still cannot move forward or backward
Check whether there is oil shortage in the gearbox and whether the oil inlet line is blocked, and then check the gearbox oil pan and torque converter filter. If you find metal fragments, etc., you can be sure that the internal parts of the large overrunning clutch in the gearbox are damaged. If aluminum chips are found in the gearbox oil pan and the torque converter filter, it is certain that the parts inside the torque converter are damaged. At this time, the gearbox and torque converter must be disassembled and inspected, and the damaged parts must be repaired and replaced. Excluding the above reasons, if the car still cannot travel, it can be determined that the bolts around the second gear member in the gearbox have been cut off, or the intermediate shaft output gear has fallen off, and the power cannot be output. Remedy: You can disassemble the 8-shaped end cover of the gearbox, take out the second gear component, and replace the cut bolts. The bolt material is 40Cr, which must be quenched and tempered, and can never be replaced by ordinary bolts.
3. Weak in first gear and reverse gear, slow driving in second gear
Check whether the pressure indicated by the variable speed pressure gauge is normal. If the pressure reaches 108KPa, increase the throttle to check whether the pointer of the pressure gauge is swinging; if it swings violently, it proves that the turbine oil in the gearbox is too dirty or the amount of oil is insufficient. Check the gearbox oil level check plug to see if the turbine oil can flow out . If there is oil flowing out, the fault is caused by too dirty oil, the gearbox and filter should be cleaned, and then replaced with new oil; if the amount of oil is normal and the transmission pressure gauge indicates normal, the fault may be the gearbox and torque converter The input secondary gear in the middle is broken, so that the power of the secondary gear of the torque converter cannot be output, and only the power of the primary gear can be output. Remedy: Remove the connection between the torque converter and the gearbox, and replace the damaged input secondary gear.
4. The first gear drive is weak, the other gears are normal
Check the pressure of the speedometer to see if there is a drop in pressure at the first gear position. If the pressure is below 98.1KPa, the first gear drive will be weak. Cause these phenomena? Excessive exposure makes the first gear drive weak; in addition, the o-ring seal on the outside of the first gear cylinder may be damaged, causing a large amount of pressure oil to leak; if the failure is caused by the above reasons, the gearbox must be lifted out , Disassemble and replace the damaged piston ring and sealing ring; if the pressure of the transmission pressure gauge is not reduced in the first gear position, it is likely that the transmission lever has not been adjusted in place, making the first gear drive weak, and the transmission lever should be re-adjusted to make it reach Specify the location.
5. The engine is working normally, and the muckineck the oil limit valve of the gearbox and the variable speed pressure gauge. If it is found that there is a lack of variable-speed torque-changing oil, add new oil. But it is not advisable to add too much, otherwise it will cause heating of the variable speed variable box, generally add until the limit valve flows out of the oil. Then check whether the boom can be raised and lowered and whether it can be steered. If the boom can be raised and lowered, it can be steered, but the slag raking machine cannot run. This is caused by the damage of the variable speed pump and lack of oil. The boom cannot be raised, lowered or turned, and the slag scraper cannot move. This situation is mostly caused by the steel plate connection of the torque converter being cut by the bolt or the elastic plate is broken. The diesel engine and the gearbox must be lifted out together, and then the connecting part of the diesel engine of the torque converter must be removed, the damaged part must be found out, and the damaged part must be replaced or repaired.
