The XCMG PN 801902820 (model YLJ-19C, old drawing 5012983) is a rubber shock absorber / vibration isolator for XCMG road rollers — primarily YZ12JC, YZ14JC, YZ16JC, YZ18JC, with some distributor listings also covering XS122 / XS123. It sits at the drum suspension interface as the elastic member that absorbs vibration energy transmitted from the vibrating drum to the frame. Being a rubber-bonded component, it is not a structural load-bearing part but an aging-consumable item, normally replaced in pairs/sets during scheduled maintenance to keep vibration isolation within design spec.
Material Description:
YLJ-19C Shock Absorber