John Deere AH148776 Hydraulic Cylinder Seal Kit

The AH148776 hydraulic cylinder seal kit is engineered to restore sealing integrity on John Deere excavator bucket and tilt cylinders. Designed for rod diameter 75 mm and bore diameter 110 mm, the kit contains precision-molded seals manufactured from nitrile rubber (NBR), polytetrafluoroethylene (PTFE), polyurethane, and nylon compounds to withstand high-pressure hydraulic fluid, abrasion, and temperature extremes. This seal kit replaces John Deere OEM part number AH148776 and cross-references catalog number 4P1158 and NSN 3805-01-500-9393. It services hydraulic cylinders on John Deere 200LC, 2054, 330LC, 370 excavators and 653G feller bunchers. The kit includes all necessary piston seals, rod seals, buffer seals, wear rings, and O-rings for a complete cylinder rebuild. Installation follows standard hydraulic cylinder disassembly and reassembly procedures with proper lubrication and torque specifications.