Case Trencher Flywheels & Ring Gears

Case Trencher Flywheels & Ring Gears parts list
Image	Fits Model	Description	Details	Part #	Price	Product Details
	See Details	480E, 480E LL, 480F, 480F LL, 580K, 580M, 580SE, 580SL Series II, 590SL Series II, 590SM, 584E, 585E, 586E, W11B, W14C, 550, 650, 450C, 455C, 650K, 750K, 1840, 1845C, 40XT, 60XT, 70XT, 75XT, 85XT, 90XT, 95XT	Flywheel Ring Gear (159 Teeth)		J901774	$48.00	View Info

Flywheels and flywheel ring gears for Case trenchers, providing engine starting engagement and rotational balance across common trencher engine platforms.

Fits Models At A Glance

Trencher Applications: Case trenchers using shared Case diesel engine platforms

Key Notes

Application: Transmits starter engagement and maintains engine rotational balance
Ring Gear: Precision-cut teeth for reliable starter pinion mesh
Fitment: Confirm tooth count and flywheel bore before ordering
Condition: New replacement components available

Why Choose Broken Tractor

✅ Fast shipping from two US warehouses
✅ Verified fitment help from our parts team
✅ New and used options to fit your budget

Frequently Asked Questions

How do I know if my Case trencher flywheel ring gear is worn out?

A worn ring gear often shows chipped, cracked, or rounded-off teeth where the starter pinion engages, which can cause grinding or a failure to crank. Inspect the gear teeth for damage and check for a starter that spins without turning the engine. If the teeth are visibly worn, replacing the ring gear restores reliable starter engagement.

Will the flywheel ring gear (SKU J901774) fit my Case trencher?

The Flywheel Ring Gear SKU J901774 fits Case trencher applications built on shared Case diesel engine platforms, along with several backhoe, skid steer, and other machine models. Because fitment depends on tooth count and flywheel bore, confirm those before ordering. Our parts team can verify the correct part for your machine at (800) 909-7060.

What should I check before ordering a Case trencher flywheel ring gear?

Confirm the ring gear tooth count and the flywheel bore so the new gear meshes correctly with your starter pinion. Matching these specs to your existing flywheel is the most reliable way to get the right part. If you are unsure, match the part number or confirm with our parts team.

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

If the flywheel itself is in good condition and only the ring gear teeth are damaged, replacing the ring gear alone is often possible. Broken Tractor carries the Flywheel Ring Gear SKU J901774 for Case trencher applications. Inspect the flywheel surface and bore for damage before deciding, and confirm tooth count for a proper fit.