Truck crane slewing ring

(A) Installation
     (1) Truck Crane slewing bearing (unit) clean. Prior to installation, carefully cleaned down to the mounting surface, the cleaning liquid can not enter inside the raceway.
     (2) Cranes and ask to be transferred bearing surface is machined. Slewing ring mating surface with the upper and lower ends of the circumferential surface of the whole range of requirements to achieve good bonding area above criteria.
     (3) slewing ring mounting holes with the mounting holes on the bottom ledge concentric ensure accuracy. Otherwise bearing easily deformed, affecting their Scissor lift support device failure will frequently generated.
     (4) the installation of slewing bolt length not less than 5d (d - bolt thread nominal size). If blind hole, then tighten the screws in the installation should not touch the bottom of the hole.
     (5) to prevent the bolt head and the nut is pressed stains material below, must pay attention to the compressive strength of the mounting surface.
     (6) the required number must be used to provide specifications of the tensile bolts.
     (7) of the bolt head and nut lower surface pressure dispersion, preferably using quenched forklift jacks washers.
     (8) bolts, threaded parts, the head, nuts and trapped between the pad friction surface must drip a little oil.
     (9) bolt preload must reach 70% of the material yield limit.
     (10) may not be used under any circumstances spring washers.
     (11) All nozzles shall be installed in an easily accessible area, and should be added to the required amount of lubrication sufficient punishment.