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8.6
THE BOOM
8.6.1 Lubrication of the lifting boom
- The bearing is lubricated by squeezing the grease in until it is forced out.
* The bearing pipe of the upper end of the turning columnhas one grease nipple.
* The bearing pipe of the joint between the lifting and transfer boom has two grease nipples.
* The bearing pipe of the joint in the lifting beam is lubricated from the grease nipple located below
the boom.
The Draw bar has three grease nipples.
* The joint bearings of the lifting and transfer cylinder (4) must be lubricated on a regular basis
8.6.2 Lubrication of the transfer booms
* The rear sliding pads of the extension are lubricated from the grease nipple located on the trans-
fer boom. In this case, the extensions must be retracted.
*In a 2 - fractional model, the chain wheel (2) bearings are lubricated from the lubrication nipple at
the end of the shaft (extensions must be retracted).
* All the grease nipples of the crane can be lubricated at one time when the transfer boom is turned
so the extensions inside under the lift boom are downwards. In this position, the inner surfaces of
the extensions and the internal chain are lubricated through the rear end of the transfer boom.
* Finally, the extensions are run completely out and top, bottom, and side surfaces of the exten-
sions are lubricated or brushed with the lubrication grease.
53
MAINTENANCE
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