truck craneslewing bearingIs an important crane"Joint", so its maintenance is very important. When carrying out maintenance work, be aware of the risk of being squeezed and sheared by the pinion being pulled into the swing. When carrying out maintenance work, it must be ensured that when starting the engine to perform the necessary steering and luffing actions, no maintenance personnel are in the dangerous area between the main arm, between the boarding and the reel, or between the alighting and the reel, except for the crane operator. Slewing bearing maintenance should do the following aspects:

Checkslewing bearingBolts:1Visual inspectionslewing bearingBolts on the crane before each work;2Check whether the bolts are loose.1secondary work100hours later; then No.300Check again every working hour, and then every working hour500Check once every hour; the inspection interval should be shortened if it is under harsh working conditions. If the bolts are found to be loose during the inspection, please stop the construction work, and immediately contact the local after-sales service department, and the factory or professional technicians will check and decide whether to disassemble and inspect immediately;3Fill the slewing bearing with lithium base grease before installation;42. Wipe the bolts clean. When replacing the bolts, apply thread fastening glue and tighten them. According to the requirements, check the fastening bolts regularly, and use the crane according to the requirements of the operation manual and the lifting performance table to avoid the danger of fatigue damage of the bolts.

Rotary routine inspection:14. Regularly check the flexibility of rotation; if noise and impact are found, stop the machine immediately for inspection and troubleshooting, and remove it if necessary;23. Regularly check the meshing tooth surface for biting, gnawing and flaking, and check the rotating gear ring for cracks or damage;3Check the integrity of the seal regularly. If the sealing band is damaged, it should be replaced in time. If it is dropped, it should be reset in time.

Lubrication of slewing bearing tooth surface: the slewing ring gear ring has been coated with anti-rust oil before leaving the factory. The validity period of this anti-rust oil is generally3 ~ 6Months. After the expiration date, anti-rust oil should be applied in time. In addition, during use, avoid direct exposure of the slewing bearing to sunlight. It is forbidden to directly flush the slewing bearing with water to prevent water from entering the raceway and prevent hard foreign matter from approaching or entering the tooth meshing area.

Lubricate the slewing bearing raceway: The raceway must be filled with grease regularly according to the working environment. Work50After hours, the raceway should be filled with grease, and then every300Inject once every working hour. The slewing bearing should be filled with grease before and after long-term placement. If the crane is cleaned with a steam jet cleaner or a fixed water jet, care must be taken to ensure that water does not penetrate the slewing connection, and then the slewing connection must be lubricated. Special working environments, such as tropical, high humidity, dusty, large temperature changes and continuous work, should shorten the lubrication cycle.