09370-00090 Packing Fits Komatsu ModelsOne New Aftermarket Replacement U Packing for Komatsu Excavators This aftermarket replacement U packing (part number 09370 00090) is a hydraulic sealing component used in the track adjuster (track tensioner) cylinder on Komatsu excavators. The U packing seals the piston within the track adjuster hydraulic cylinder, maintaining proper grease pressure and track tension for smooth undercarriage operation. This style of packing is also catalogued as a
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