All bearings, bushings and shaft components are installed on professional 20-ton hydraulic press equipment, following strict OEM pressure and depth standards — not by feel, and not by eye.
Worn valve bores are restored by professional re-sleeving technology instead of simple polishing, restoring precise clearance and the long-term hydraulic stability a polished-only bore cannot hold.
Press fit quality decides whether a bearing stays where it was put. Depth and pressure standards exist because clearance drift is invisible at assembly and expensive after shipment.