How to replace the slewing bearing in the excavator

2019-12-25

Excavators are widely used in daily life, and slewing bearings are also widely used on excavators. However, the excavator slewing bearing is very easy to cause fatigue and tooth collapse of the abs gear ring due to the large slewing half-warp and overloading work. In the face of such work, the replacement of the slewing bearing can no longer be delayed. Today, Tianyue slewing bearing is here to explain the disassembly, replacement and assembly methods of excavator slewing bearings.

Move the excavator to a level spot. For convenient assembly and disassembly, you can use special tools such as small wind guns to extend the rear arm first, and then use rope and the upper lifting hole to tie to the rear weight to prevent the rear arm from falling off. , The fixed screw at the back needs to be turned in two places to remove two, if the arm is dropped, it will be a mess.

Use the base to fully disassemble the seat of the driving seat. When disassembling, you can see the middle rotary connector. Separate the three upper oil pipes, pump one oil, and move four back and forth. Slewing bearing butter pipes can be arranged in series with thin iron wires, that's right. Then the slewing motor can be disassembled and extended, so that the whole excavator can rotate. Remove the back circle of screws first, then you can move the upper part to another area.

Remove the upper part, you can see that all the slewing bearings are owned. Check and see, it is confirmed that many teeth have broken. Generally, you will hear noises when the teeth are broken, or you can not move when you rotate to a certain position. I found that this situation needs to be suspended. Do not compulsory construction for fear of damaging the general process of the rotary motor. First disassemble the fixed screw of the inner ring, move the slewing ring aside, and treat it as scrap metal for value. Then clean the butter and clean it with car gasoline to clean the iron pins.

Install the slewing bearing and tighten the screws. The screws need to be disassembled again to avoid concealed injuries and cracks. Due to small losses and large losses, the screws need to be high-toughness. Generally, the Chinese standard 12.9 level is selected. Each screw needs to be grasped with a KG wrench. , Exceed the uniform working pressure. Tighten the screws of the inner ring, wipe the butter on the rack, and evenly spread each tooth. After wiping, reinstall it according to the direction of the upper half of the fork, point to the positioning nails of the service platform and the slewing ring together, and then reinstall them one after the other.