Small crane Rotary ineffective phenomenon was not obvious at first, just in section 4 arm stretched out after all, turning slightly card phenomenon.But with the increase of working time, load, when lifting heavy objects, boom will often stop at a particular location and cannot rotate in place.
By visual inspection, found that rotary valve priority and rotary hydraulic motor temperature is very high, can't touch by hand.Check the priority valve and resolution, but found no abnormalities.Then overhaul hydraulic motor, the persistence of the found needle roller bearing on the hydraulic motor drive shaft frame was damaged, after the needle loose in together.Due to heavy work load and time longer, resistance increases, the hydraulic oil temperature, at the same time because of needle roller in together, restore bearing stuck, cause the entire installation can't rotate.Change after the needle roller bearing, small crane slewing returned to normal.
According to analysis, form the reason for the problem is needle roller bearing smooth oil shortage.This is the defect should not attack, using personnel must inject smooth oil on time, and regular cleaning oil hole.The above problems illustrate the importance of equipment maintenance care.
Zhengzhou Kebu Technology Co.,Ltd. Is China's domestic engaged in the narrow space with mini crawler crane production research of professional manufacturers.Company production of mini crawler crane with independent intellectual property rights, patent number: ZL 2009 2009 X.And has a number of mini crawler crane patent production technology.Mainly used in the narrow space of the car engine workshop equipment maintenance, electric power maintenance, chemical workshop maintenance, building curtain wall installation, the construction of the high speed rail station, and cemetery stone industry situations in the narrow space.If you are interested in our products, please contact us, the hotline: 0371-6371, 6261
