707-99-57200 Arm Cylinder Seal Kit Fits Komatsu PC200-5 PC200-6 PC210-6 PC220-5

One New Aftermarket Replacement Arm Cylinder Seal Kit for Komatsu Excavators

This aftermarket replacement hydraulic cylinder seal kit restores proper sealing to the arm cylinder on Komatsu PC-series excavators, preventing hydraulic fluid leaks and maintaining full digging force. The kit covers arm cylinder applications across the PC200-5, PC200-6, PC210-6, and PC220-5 series and bucket cylinder applications on the PC400-5. Serial number restrictions apply -- verify your machine serial number against the fitment table below before ordering.

Cylinder and Serial Number Application Guide

• Arm -- PC200-5, PC200LC-5: Cylinder 205-63-02120, S/N 45001 and up
• Arm -- PC200-6, PC200LC-6: Cylinder 205-63-02521, S/N 80001-84384; S/N A80001 and up; S/N A82001 and up
• Arm -- PC200-6, PC210-6: Cylinder 205-63-02522, S/N 84385 and up
• Arm -- PC200LC-6: Cylinder 205-63-02522, S/N 84385-96513
• Arm -- PC210-6: Cylinder 205-63-02521, S/N 80001-84384
• Arm -- PC210-6, PC210LC-6: Cylinder 205-63-63340, S/N A82001 and up
• Arm -- PC210-6K, PC210LC-6K: Cylinder 20Y-63-K1170, S/N K30001 and up
• Arm -- PC210LC-6: Cylinder 205-63-02521, S/N A80001 and up
• Arm (Slf) -- PC220-5, PC220LC-5: Cylinder 205-63-02120, S/N 35001 and up
• Arm -- PC240-6K, PC240LC-6K: Cylinder 206-63-K1140, S/N K30001 and up
• Bucket (L/S) -- PC400-5: See cylinder reference for applicable S/N range

Compatible Models

Komatsu PC200 Series: PC200-5, PC200LC-5, PC200LC-5C, PC200LC-5S, PC200LC-5X, PC200-6, PC200LC-6, PC200LC-6H, PC200LC-6J, PC200LC-6S, PC200LC-6Z

Komatsu PC210 Series: PC210-6, PC210LC-6, PC210-6G, PC210LC-6G, PC210-6K, PC210LC-6K, PC210LC-6L, PC210LC-6LC

Komatsu PC220 Series: PC220-5, PC220LC-5, PC220LC-5C

Komatsu PC240 Series: PC240-6K, PC240LC-6K

Komatsu PC400 Series: PC400-5 (Bucket cylinder, L/S application)

Replaces Part Number(s):

707-99-57200, 707-99-57200-A, 7079957200

New aftermarket replacement part - not remanufactured, not used.