Case CX290B Seal Kits & Cylinders

Case CX290B Seal Kits & Cylinders parts list
Image	Fits Model	Description	Details	Part #	Price	Product Details
	See Details	CX240BLR, CX250C, CX260E LC, CX290B, CX300C	Dipper Arm Cylinder Seal Kit		MMV80090	$228.00	View Info

Hydraulic cylinder seal kits and cylinder components for the Case CX290B excavator, covering dipper arm cylinder rebuilds and related sealing applications across compatible C and B series machines.

Fits Models At A Glance

CX B Series: CX240BLR, CX290B
CX C Series: CX250C, CX300C
CX E Series: CX260E LC

Key Notes

Application: Dipper arm cylinder sealing and hydraulic cylinder rebuilds
Kit Contents: Rod seals, piston seals, wipers, and O-rings for full cylinder service
Fitment: Verify cylinder bore and rod dimensions before ordering
Condition: New replacement seal kits and cylinder assemblies available

Why Choose Broken Tractor

✅ Correct seal kits matched to Case cylinder specs
✅ Fast shipping from two US locations
✅ Knowledgeable staff for hydraulic part fitment

Frequently Asked Questions

What is included in the Case CX290B dipper arm cylinder seal kit?

The Case Excavator Dipper Arm Cylinder Seal Kit (SKU MMV80090) includes rod seals, piston seals, wipers, and O-rings for a full cylinder service. This covers the sealing components needed to rebuild the dipper arm cylinder rather than replacing the entire cylinder.

Does the CX290B seal kit fit other Case excavator models?

Yes, the dipper arm cylinder seal kit (SKU MMV80090) fits the CX240BLR, CX250C, CX260E LC, CX290B, and CX300C. Before ordering, verify your cylinder bore and rod dimensions to confirm the kit matches your specific machine.

How do I know if I need a seal kit or a new cylinder for my CX290B?

If the dipper arm cylinder body and rod are still in good condition but the cylinder is leaking, a seal kit like SKU MMV80090 can rebuild the sealing surfaces. If the rod is scored, bent, or the bore is damaged, a full cylinder assembly may be needed. Broken Tractor offers both new replacement seal kits and cylinder assemblies for the CX290B.

How do I confirm the right seal kit for my Case CX290B?

Match the part number and verify your cylinder bore and rod dimensions before ordering, since fitment can depend on cylinder specifications. If you are unsure which kit fits your machine, our parts team can help you confirm the correct match at (800) 909-7060.