Model Spotlight

Case 580L Backhoe Loader: Specs, Parts & Common Issues

Produced 1995 - 2000, the 580L is the naturally aspirated L-generation Construction King. Cummins 4-390 four-cylinder diesel carrying 75 HP gross forward from the 580K, paired with redesigned L-generation hydraulics, a new cab with substantially improved operator station, and a 17-spline hydraulic pump that defines the L-generation drivetrain. Most service parts cross-fit with the larger-volume 580M that succeeded it.

BT

Broken Tractor Editorial Team• Updated May 2026• 10 min read

The Case 580L is the naturally aspirated version of the L-generation Construction King small-frame backhoe loader. It came to market in 1995, replacing the 580K, and ran through 2000 alongside the turbocharged 580 Super L. The 580L carries the same Cummins 4-390 four-cylinder 3.9 L naturally aspirated diesel forward from the 580K - output rated at approximately 75 HP gross - and pairs it with the L-generation cab, refined hydraulics, and a new 17-spline hydraulic pump configuration that distinguishes the L-generation drivetrain from the earlier K-generation 9-spline arrangement.

For owners maintaining a 580L today, the most useful single fact is that many service parts cross-fit with the 580M (2001-2008) that succeeded it. The 580L and 580M share the same cab, the same backhoe iron, the same hydraulic architecture (with the 17-spline pump shaft), and most pin and bushing wear points. Catalog labels reading "580L, 580M" reflect this commonality. The 580 Super L (turbocharged variant of the 580L) sits on the same chassis but with engine and exhaust differences.

At-a-glance specifications

How the 580L differs from the 580 Super L

The 580L and 580 Super L share their chassis, transmission architecture, axles, brakes, hydraulics, cab, and most loader and backhoe iron. The differences are confined to the engine and supporting systems:

• Engine - 580L uses the naturally aspirated Cummins 4-390 (~75 HP gross); 580 Super L uses the turbocharged 4T-390 (~86-91 HP gross depending on Series I or II).
• Turbocharger - only on the Super L. The wastegated turbo, mounting brackets, oil supply and return lines, and exhaust plumbing are all Super L-specific.
• Muffler - 192928A1 non-turbo muffler is the 580L's exhaust component; 192483A1 is the turbo muffler for Super L Series I (Series II uses different exhaust).
• Filter kits - Super L uses Series I (CS-580LI-FK) or Series II (CS-580LIIT-FK) filter sets depending on serial number. The 580L uses a non-turbo filter configuration.
• Power output - Super L approximately 11-16 HP higher with substantially more low-end torque under load.
• Hydraulic tank capacity - Super L Series I uses a dedicated hydraulic tank (130050A1) that differs from the 580L's tank configuration.

Everything else - drivetrain, chassis, brakes, cab, loader, and backhoe - interchanges with the Super L. Many parts labeled "580L, 580 Super L" in our catalog fit both machines.

How the 580L differs from the 580K

The 580L is a substantial platform refresh over the 580K rather than a minor evolution. The notable changes:

• Cab and operator station - completely redesigned L-generation cab with improved visibility, better operator controls, and refined HVAC architecture.
• Hydraulic pump spline change - the 580L uses a 17-spline hydraulic pump shaft (257953A1 in our catalog); the 580K used a different spline configuration. This means 580K hydraulic pumps will not fit the 580L and vice versa.
• Refined hydraulic plumbing - updated hose routing, control valve refinements, and improved cooling integration.
• Loader and backhoe iron refinements - minor structural updates to the loader frame and backhoe components for improved durability.
• Same engine block - Cummins 4-390 carried forward from the 580K. Engine internals interchange.
• Same wet-disc brake architecture - wet-disc multi-plate brakes continue from the 580K.

Cummins 4-390 engine (naturally aspirated)

The 580L's Cummins 4-390 is the same naturally aspirated 4BT 3.9 L engine used on the 580K Phase I (and other Phase III variants). The engine carries forward unchanged from the K generation - the 580L's engine changes are calibration and emissions-control refinements rather than fundamental architecture changes. That means 4-390 service parts (pistons, rings, bearings, head gasket sets, water pumps, oil pumps) source through Cummins 4BT industrial channels as well as Case-branded parts.

The 4BT's broad industrial-engine ecosystem is one of the most useful single facts about the 580L's parts availability. The same engine appears on Dodge Ram pickups, industrial generator sets, marine pumps, and a long list of construction equipment.

Power shuttle and wet-disc brakes

The 580L uses Case's four-speed Power Shuttle transmission with single-stage torque converter, with refinements over the K-generation shuttle. Wet-disc multi-plate brakes continue from the 580K with the same general architecture. Service items follow the same wear pattern as the K generation: hydraulically actuated clutch packs wear, the shuttle control valve gets sticky, and the torque converter charge pump weakens with age.

Routine service parts for the 580L

The parts table below covers the routine service and high-cross-fit parts for this model. Many parts cross-fit with the 580M, increasing the effective parts pool.

For a comprehensive Case 580L parts inventory beyond these top-sellers, browse the Case backhoe loader parts hub or consult the related Case 580M spotlight for cross-fit items.

Common issues and what to expect

Hydraulic cylinder seal failure

The 175251A1 loader bucket tilt cylinder seal kit and 131750A2 580L cylinder seal kit are the two most-replaced 580L parts. The most-common service item on a 580L is hydraulic cylinder seal degradation. 25-plus-year-old seals dry out and weep - every cylinder on an unrestored 580L is a candidate for reseal.

Hydraulic pump wear

The 257953A1 17-spline hydraulic pump wears over time. Symptoms: lazy boom and dipper, weak stabilizers, longer cycle times under load.

Bucket and dipper cylinder wear

The bucket cylinder (128760A1-R rebuilt, 175238A1 loader bucket cylinder) and dipper cylinder (233114A2 new) are the highest-cycle hydraulic components on the backhoe. Plan on cylinder rebuild or replacement at 5,000-8,000 hour intervals depending on service severity.

Swing tower wear

The swing tower takes the full load of every dig cycle. The 326806A1-KIT swing tower pin and bushing kit covers the wear items at the bottom-of-tower interface. Symptoms of wear: slop in the boom under load, audible knock during swing reversals.

Stabilizer cylinder wear

The 195503A1 / 195504A1 stabilizer cylinders are routine replacement items. Stabilizers get hammered every time the operator sets down - particularly on hard surfaces.

Power shuttle clutch wear

The Power Shuttle's hydraulically actuated clutch packs wear with age. Symptoms: harsh direction changes, slow engagement, slipping under load.

Wet-disc brake wear

Continued from the 580K. After 6,000-8,000 hours of service, wet-disc brakes wear out. The L-generation brake architecture is similar to the K-generation, with the same general service profile.

Cab and HVAC service

The redesigned L-generation cab introduced more sophisticated HVAC and operator-station electronics. Common items on 25-plus-year-old cabs: weather seal degradation, A/C compressor wear, and gauge cluster aging.

Where the 580L sits in the Construction King family

The 580L is the L-generation naturally aspirated Construction King small-frame backhoe loader. It sat alongside the turbocharged 580 Super L from 1995 through 2000. Above it in the L generation was the larger-frame 590 Super L. Before the 580L came the 580K with the same engine family but the earlier 9-spline hydraulic pump and pre-L cab. After the 580L came the 580M (2001-2008) with the Case 445T/M engine replacing the Cummins 4-390 and refined hydraulics carrying the 17-spline pump configuration forward.