Case Backhoe Idler and Primary Shaft

Click on each number to jump to the product page. Each number on the image is a "Ref #" that can be matched on the table below.

Case Backhoe Idler and Primary Shaft parts list
REF #	Image	Fits Model	Description	Price	Product Details
Kit	See Details	570LXT (Before Serial Number JJG0225755), 580L, 580 Super L (Before Serial Number JJG0239260), 590 Super L (Before Serial Number JJG0210575)	Transmission Overhaul Kit (4WD)	278836A1	$694.00	View Info
Kit	See Details	570LXT (*All Series I), 580L, 580 Super L, 590 Super L	Two Wheel Drive Transmission Service Overhaul Kit	278302A1	$675.00	View Info
2	See Details	570LXT, 580L, 580 Super L, 590 Super L	Circle Clip	0	A48041	$4.00	View Info
3	See Details	570LXT, 570MXT, 570N EP, 570NXT, 580L, 580 Super L, 580M, 580 Super M, 580N, 580 Super N, 585G, 586G, 586H, 588G, 588H, 590 Super L, 590 Super M, 590 Super N	Ball Bearing, Transmission Input Shaft	181128A1	$18.00	View Info
3 & 5	See Details	570LXT, 580L, 580 Super L, 590 Super L	Pinion Idler Gear (27 Teeth)	0	181186A1	$135.00	View Info
4	See Details	570LXT, 580L, 580 Super L, 590 Super L	Reverse Idler Shaft	0	181181A1	$125.00	View Info
9	See Details	580L, 580 Super L, 590 Super L, 570LXT, 585G, 586G, 588G	Third Gear	181188A1	$124.00	View Info
10	See Details	580L, 580 Super L, 590 Super L, 570LXT, 585G, 586G, 588G	Transmission Fourth Gear	181187A1	$155.00	View Info
11	See Details	580L, 580 Super L, 590 Super L, 570LXT, 585G, 586G, 588G	Primary Transmission Shaft	181184A1	$340.00	View Info
11	See Details	580L Series II, 580 Super L Series II570MXT, 580M, 580 Super M590 Super L Series II590 Super M	Primary Shaft	358646A1	$845.00	View Info
	See Details	570LXT, 580L, 580SL, 580M, 580SM, 585G, 586G, 588G	Seal Ring, Transmission Shaft	358645A1	$12.00	View Info

Idler and Primary Shaft Case 580L, 580SL, 590SL, 570LXT Carraro Transmission Assembly

Idler gears, primary shafts, reverse idler shafts, and related gear train components for Case backhoe Carraro transmissions, covering 580L and 580M series machines along with 570LXT and 590 Super L backhoes. New and used parts are available for both 2WD and 4WD gear trains.

Fits Models At A Glance

580L Series: 580L, 580 Super L, 580L Series II, 580 Super L Series II
580M Series: 580M, 580 Super M, 590 Super M
590 Series: 590 Super L, 590 Super L Series II
570 Series: 570LXT, 570MXT

Key Notes

Application: Idler gears, primary shafts, and reverse idler shafts inside the Carraro transmission gear train
Gear options: Third gear 28 tooth, fourth gear, and 27 tooth pinion idler gears offered
Hardware: Circle clips, ball bearings, and shaft sealing rings included in the range
Drive setup: Parts suit both 2WD and 4WD Carraro transmissions
Fitment note: Some parts vary by serial number, so match part numbers before ordering

Why Choose Broken Tractor

✅ New and used Carraro transmission parts in one place
✅ Fitment help from a knowledgeable parts team
✅ Fast shipping from our US locations

Frequently Asked Questions

What primary shaft fits a Case 580L?

The Carraro primary shaft SKU 181184A1 fits the Case 580L, 580 Super L, 590 Super L, and 570LXT. A separate primary shaft, SKU 358646A1, covers the 580L Series II, 580M, and 580 Super M backhoes. Match the part number to your machine to confirm the correct fit.

How many teeth is the pinion idler gear for a Case 580 Super L?

The pinion idler gear for the 570LXT, 580L, 580 Super L, and 590 Super L has 27 teeth, SKU 181186A1. We also carry a third gear with 28 teeth and a fourth gear for the same models.

Do these idler and shaft parts fit both 2WD and 4WD transmissions?

Yes, we carry idler gears, primary shafts, and hardware for both 2WD and 4WD Carraro transmissions. Some 4WD parts vary by serial number, so confirm your machine details before ordering. Call our parts team at (800) 909-7060 if you need help matching a part.

Will a 580L reverse idler shaft fit a 590 Super L?

Yes, the reverse idler shaft SKU 181181A1 fits the 570LXT, 580L, 580 Super L, and 590 Super L. Confirm the part number against your existing shaft to be sure of the fitment.