21W-70-41440 Seal-Dust Fits Komatsu ModelsOne New Aftermarket Replacement Dust Seal for Komatsu Excavators This aftermarket replacement dust seal (part number 21W 70 41440) fits the bucket linkage assembly on Komatsu compact and mid size excavators. Dust seals in the bucket linkage protect pin and bushing joints from contamination, extending the service life of linkage components under demanding construction conditions. Compatible Models Komatsu Excavators: PC60 7, PC78US 6, PC78UU 6, PC78UU
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