In a recent operation, DIMO's service engineers dismantled three crane columns. They were all transported to Saunesmarka for an overhaul, which involves service procedures such as line boring and overhauling of all six gears.
Over time, environmental factors and usage can cause wear and tear, leading to slack crane column bolt bores. This slackness can have a significant impact on the movement and performance of the jib or crane arm.
By performing line boring combined with bore welding, the bores are restored to their original dimensions, providing a secure and accurate fit for the bolt, as the new hole is seamlessly integrated into the component.
First, line boring is carried out to clean and prepare the area for welding. During the welding process, the diameter of the bolt bore is reduced. Finally, line boring is performed to achieve an exact match with the original dimensions, eliminating the need for inserts.
All six gears were dismantled as part of the maintenance process.
The pinions were replaced due to significant wear on their teeth, the slewing gears got new seals and bearings and the slewing ring was completely replaced.
