Feature Application: For Backhoe Loaders 480D, 480D LL, 580D, 580 Super D, 580 Super E. For Crawler / Dozers 850C, 855C with Backhoe Models 35A, 35C, 35C WL, 35 WL, 850D with Backhoe Models 35C, 35C, WL, W14, W14L, W14H. Advantage: This kit covers all of the seals for the complete hydraulic unit. Seal kits provide quick repair of cylinder leaks and facilitate rebuilding of standard hydraulic cylinders. These seals will never wear out and reseal without issue. Rebuild your unit easily and save your time & money. .