A stick cylinder on a CAT 330D rarely fails all at once. Usually the stick starts drifting under load, the cycle slows down, or the rod comes back with a wet film on it. By the time the wiper stops keeping grit out, the rod seal and piston seals are already taking damage.
This 231-6845 seal kit is for that repair. OEM reference: 231-6845 / 2316845. It covers the rod, piston, and static sealing points. PU is used for the pressure lips, Viton for heat resistance, and NBR for oil-side and static sealing. Profiles are molded to OEM groove dimensions, so they install without trimming or stretching.
Seal kit only. Cylinder barrel, rod, and piston are not included.
Fitment:
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CAT 330D stick cylinder
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OEM reference: 231-6845 / 2316845
Check the machine model, cylinder part number, and serial number before ordering. A 330D can use more than one cylinder configuration, so the model alone may not be enough.
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