What it is: kit 4217004 for the Hitachi EX60 excavator.
Cross-reference numbers listed with it: 4194434.
The bucket cylinder curls the bucket in and dumps it out, short strokes under load all day.
The compounds are polyurethane (PU), Viton and NBR. PU copes with pressure spikes, Viton with heat, and NBR is the usual oil-resistant rubber.
Before you order: Match the part number of your cylinder with 4217004 before ordering, and use the machine serial number if the part number is unreadable.
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