Case CX300D Seal Kits & Cylinders

Hydraulic cylinder seal kits and complete cylinder assemblies for Case CX300D excavators, covering boom, arm, and bucket cylinders in new and remanufactured form.

Fits Models At A Glance

• CX300D Series: CX300D, CX300D LC

Key Notes

• Application: Boom, arm, and bucket hydraulic cylinder service and replacement
• Seal Kits: Rod seals, piston seals, wipers, O-rings, and backup rings
• Cylinders: Complete assemblies available for full replacement
• Compatibility: Matched to CX300D cylinder bore and rod dimensions

Why Choose Broken Tractor

• ✅ Fast shipping from two US warehouse locations
• ✅ Verified fitment for Case CX300D excavators
• ✅ Knowledgeable support for hydraulic cylinder repairs

Frequently Asked Questions

What is included in a Case CX300D hydraulic cylinder seal kit?

A Case CX300D seal kit typically includes the rod seals, piston seals, wipers, O-rings, and backup rings needed to service a hydraulic cylinder. These parts cover the boom, arm, and bucket cylinders. Broken Tractor carries seal kits matched to the CX300D cylinder bore and rod dimensions.

Should I replace the whole cylinder or just reseal it on a Case CX300D?

If the cylinder barrel, rod, and mounts are still in good condition, a seal kit is usually enough to stop leaks and restore performance. If the rod is scored or the barrel is worn, a complete cylinder assembly is the better choice. Broken Tractor offers both seal kits and complete cylinder assemblies in new and remanufactured form for the CX300D.

Do these seal kits and cylinders fit the Case CX300D LC?

Yes, Broken Tractor carries seal kits and cylinders for the CX300D Series, including the CX300D and CX300D LC. Because fitment depends on the specific boom, arm, or bucket cylinder and can vary by serial number, match the part number to your cylinder or confirm with our parts team before ordering.

How do I know which Case CX300D cylinder seal kit I need?

Identify whether you are servicing the boom, arm, or bucket cylinder, then match the seal kit to that cylinder's bore and rod dimensions. Serial number breaks can affect which kit fits, so matching the part number to your cylinder is the most reliable method. Our knowledgeable support team can help confirm the right kit; call (800) 909-7060.

Are remanufactured Case CX300D cylinders available?

Yes, Broken Tractor offers complete cylinder assemblies in both new and remanufactured form for the CX300D. Remanufactured assemblies are a full replacement option when a cylinder is too worn to reseal. Confirm the part number against your existing cylinder to ensure correct fitment.