Excavator - repair and maintenance skills of the rotary turntable

Maintenance of the rotary turntable

The rotating large turntable part includes components such as a rotating ring gear, a speed reducer, and a center joint. Usually we open the cover next to the base of the boom to observe the lubrication in the large ring gear cavity and the ring gear wear. With the use of the machine, the dust ring at the center of the slewing will be aging. If it encounters rain, the rain will seep into the large ring gear at the sag of the center of the slewing ring, causing water in the turntable. This will greatly affect the service life of the rotating ring gear of the love machine.

excavator

During the operation of the excavator, the butter in the cavity is diluted by water, the lubrication effect is not up to standard, and the wear of the ring gear will be aggravated. In addition, the long time soaking will cause the iron on the ring gear to peel off, eventually leading to the rotation. Abnormal sound. The most serious is the ring gear failure.

Inspection and maintenance: General rotary gear inspection and lubricant replacement cycle is every 2000 hours or one year, and the 20-ton machine butter filling amount is about 36 liters (two barrels). Regularly open the boom base and the square front cover to check the ring gear and lubrication. Maintain or find accumulated water to open the cover in the X-cavity cavity at the bottom of the excavator to release accumulated water.

Slewing bearing maintenance and maintenance

There is a common misunderstanding in the maintenance of the slewing bearing. It is believed that the lubricating oil of the slewing bearing is the same as the lubrication cycle of the large and small arms, and is played every day. In fact, such an action has the opposite effect. If the lubrication cycle is too short, the lubricating oil in the bearing will be too much, and the dust ring will be leaked out. When there is a leak, impurities will enter the inside of the bearing and damage the normal operation of the bearing. Caterpillar recommends that the lubrication interval of the slewing bearing is every 250 hours. Batter the butter up and down at the same time. Rotate the machine while playing. It is enough to fire a full gun at 15°. In different applications, the lubrication cycle can be adjusted according to the strength of your work. Generally, it can be lubricated once every week.