1. The loader can start but cannot move.
First check the transmission oil limit valve and transmission pressure gauge. If it is found that there is a lack of transmission and torque oil, new oil should be added. But it is not advisable to add too much, otherwise it will cause the transmission to heat up. Then check whether the boom can rise and fall and whether it can turn. If the boom operates normally but the loader cannot walk, it is most likely caused by damage to the variable speed pump and lack of oil. The boom cannot operate normally and the loader cannot move. This situation is mostly caused by the steel plate connection of the torque converter being sheared by bolts or the elastic plate being broken. The diesel engine and gearbox must be lifted out together, then the connecting part of the diesel engine of the loader torque converter must be removed, the damaged parts must be identified, and the damaged parts must be replaced or repaired.
2. The loader can only move forward but not backward.
First check whether the pressure indicated by the variable speed pressure gauge is normal. If the reverse gear pressure decreases, there may be too much oil leakage from the reverse gear part. The gearbox must be lifted out and completely disassembled for inspection. Take out the reverse gear piston, replace the piston ring, check the damage of the friction plate, replace the seriously worn friction plate, and readjust the reverse gear space. If the reverse gear pressure does not decrease, the forward gear may become stuck. If the reverse gear friction plate slips and the reverse gear cannot travel, the gearbox must be lifted out and disassembled to check whether the isolation ring on the first gear inner ring gear is broken. Because the broken piece can block the friction plate, the reverse gear friction plate will slip and become ineffective, resulting in the fact that it can only move forward but not backward. The isolation ring can be taken out and replaced with a new one.
3.The loader drive is weak and stops every now and then.
Method 1: First check the oil limit valve next to the gearbox. If there is a lack of oil, add new oil. If the oil level is normal, the transmission pressure gauge should be checked. If the pressure gauge swings violently, it indicates insufficient oil supply. You can check whether the oil inlet pipe is blocked, whether the inner layer of the hose is aged, whether the torque converter filter is clean, and whether the filter element is clean. If it is due to the above reasons, clean and flush the clogged pipes and filter elements with compressed air several times until they are clear before use. Bubbled hoses need to be replaced. Method 2: Observe whether there are metal blocks, aluminum chips, etc. on the filter. If there are any, it indicates that there are damaged parts in the torque converter and gearbox. They must be disassembled and inspected, and the damaged parts must be replaced.
Finally, the above methods are for reference only. If a fault occurs, we should ask professional maintenance personnel to help us repair it to avoid making the fault worse due to unprofessional operations!
