580K, 580SK, 580L, 580SL, 580M, 580SM, 590, 590SL

Front axle 2WD parts for Case backhoe loaders, covering axle beams, spindles, king pins, steering cylinders, wheel hubs, bearings, and pivot pins across the 580K through 590 Super M series machines.

Fits Models At A Glance

• 580K Series: 580K, 580 Super K
• 580L Series: 580L, 580 Super L
• 580M Series: 580M, 580 Super M, 580M Series I
• 590 Series: 590 Turbo, 590L, 590 Super L, 590 Super M

Key Notes

• Application: Two-wheel-drive front axle steering and suspension components
• Coverage: Axle beams, spindles, king pins, bushings, and pivot pins
• Steering: Power steering cylinders, eyelets, jam nuts, and link pins
• Wheel End: Front hubs, lug bolts, wheel bearings, and oil seals
• Condition: New, OEM, and rebuilt assemblies available

Why Choose Broken Tractor

• ✅ New, rebuilt, and OEM front axle options
• ✅ Verified fitment across 580 and 590 series
• ✅ Fast shipping from two US locations

Frequently Asked Questions

Does the Case 590 Turbo use the same 2WD front axle as the 580K, 580L and 580M?

No, the 590 Turbo, 590 Super L and 590 Super M use a different two-wheel drive front axle than the 580K through 580 Super M. For the 580K, 580 Super K, 580L, 580 Super L, 580M and 580 Super M, Broken Tractor carries the new bare beam D138954, the replacement assembly D138954A, the rebuilt kit D138954R and the rebuilt axle with steering DC580KFAC. For the 590 Turbo, 590 Super L and 590 Super M Series I, we offer the new axle D148413-Assy and the rebuilt kit D148413R. Some 580M, 580 Super M and 590 Super M applications are marked for verification, so confirm your model and serial number before ordering.

Which power steering cylinder fits a Case 590 Super M?

The 590 Turbo, 590 Super L and 590 Super M Series I built before serial number N4C309000 use power steering cylinder 1986518C2, which we carry new and as a rebuilt unit, 1986518C2R. The 580K, 580 Super K, 580L, 580 Super L and 580M Series I use a different cylinder, G107720, which we offer in both aftermarket and OEM versions (G107720-OEM). Check your serial number against these breaks before ordering, since a later 590 Super M will not match 1986518C2.

What parts do I need to replace the king pins on a Case 580K or 580L 2WD backhoe?

We carry the Case two-wheel drive king pin kit D103626, which fits the 580K, 580 Super K, 580L, 580 Super L, 580M, 580 Super M, 590 Turbo, 590 Super L and 590 Super M. If you are rebuilding the spindle area piece by piece, we also offer the king pin D123865, spindle bushing D127507, king pin O-ring 271624 and front axle spindle bearing 138712. If the spindles themselves are worn, we carry the right hand spindle D125340 and left hand spindle D125341.

Which front axle pivot pin fits a Case 580K versus a 580L or 580M?

The 580K, 580 Super K and 590 Turbo use the greasable front axle pivot pin D127445. The 580L, 580 Super L, 580M, 580 Super M, 590 Super L and 590 Super M use pivot pin 378290A1 or 138616A1, which is 436.5 millimeters long. For the matching bushings, D137345 covers the 580K through 590 Super M range, D127542 fits the 580L, 580 Super L, 580M and 580 Super M, and the rear bushing D135075 is for early 580K Series I machines. If you are unsure which applies to your serial number, call (800) 909-7060 and the parts team can confirm.

Do the steering cylinder eyelets on a Case 580 or 590 2WD backhoe have left hand or right hand threads?

There is one of each, so we carry both a left hand thread eyelet, G106832, and a right hand thread eyelet, G106813. Both fit the 580K, 580 Super K, 580L, 580 Super L, 580M, 580 Super M, 590 Turbo, 590 Super L and 590 Super M. Pair each eyelet with the correct jam nut, using 86625063 for the left hand thread side and 86636806 for the standard steering cylinder jam nut. To finish the steering linkage, we also offer the steering link pin D150155, link D123806 and snap ring 643522.