Case Excavator Flywheel & Ring Gear

Case Excavator Flywheel & Ring Gear parts list
Image	Fits Model	Description	Details	Part #	Price	Product Details
	See Details	650K, 750K, 850D, 855D, 850K, 1150E, 1155E, 1150G, 1150H, 1550, 680L, 780C, 780D, 688, 888, 1088, 9010, 880D, 9010B, 9020, 9020B, 9030, 9030B, 9040, 9040B, 9045B, CX130, CX160, CX210, CX240, CX290, 1085B, 1085C, 1086B, 1187C, W14B, W14C, W36, 621, 62	Flywheel Ring Gear (127-Teeth)		J905427	$74.00	View Info

Flywheel ring gears for Case excavators, providing the starter engagement teeth that drive engine cranking across a wide range of crawler excavator models. Replacement ring gear J905427 restores worn or damaged teeth without requiring a full flywheel assembly.

Fits Models At A Glance

688 Series: 688, 888, 1088
9000 Series: 9010, 9010B, 9020, 9020B, 9030, 9030B, 9040, 9040B, 9045B
CX Series: CX130, CX160, CX210, CX240, CX290

Key Notes

Application: Transfers starter motor rotation to the engine flywheel for reliable cranking
Part Type: Replacement flywheel ring gear
Condition: New and used options available depending on model
Reference SKU: J905427

Why Choose Broken Tractor

✅ Wide Case excavator coverage from a single source
✅ Fast shipping from two US locations
✅ Knowledgeable staff to confirm correct fitment

Frequently Asked Questions

What Case excavator models does ring gear J905427 fit?

Ring gear J905427 fits a wide range of Case excavators, including the 688, 888, and 1088, the 9010, 9010B, 9020, 9020B, 9030, 9030B, 9040, 9040B, and 9045B, and the CX130, CX160, CX210, CX240, and CX290. Because coverage spans many models and serial ranges, match the part number or confirm your model with our parts team before ordering.

Can I replace just the ring gear or do I need a whole flywheel?

You can replace just the ring gear on many Case excavators. J905427 restores worn or damaged starter teeth without requiring a full flywheel assembly, which is why we offer it as a standalone replacement ring gear.

What are the signs of a worn flywheel ring gear on a Case excavator?

Common signs include grinding, a starter that spins without engaging, or difficulty cranking the engine, all of which point to worn or damaged teeth on the ring gear. The ring gear transfers starter motor rotation to the flywheel, so damaged teeth interrupt reliable cranking. Replacing the ring gear with J905427 restores proper starter engagement.

Are new or used flywheel ring gears available for Case excavators?

Broken Tractor offers both new and used options depending on the model. Availability varies by machine, so confirm which condition fits your excavator by matching the part number or checking with our parts team.

How do I confirm the correct ring gear for my Case excavator?

Match your machine to reference SKU J905427 and verify your model and serial number, since fitment can depend on the serial range. Our knowledgeable staff can confirm the correct part for your excavator at (800) 909-7060.