Case 580 Super L Backhoe Loader: Specs, Parts & Common Issues
Produced 1995 – 2000 as the turbocharged version of the L-generation Construction King. Cummins 4T-390 turbocharged four-cylinder diesel, approximately 86–91 HP gross, the redesigned L-generation cab, and the critical Series I vs. Series II drivetrain split at serial JJG0258465 — the latter introducing the optional Powershift transmission. Same chassis as the 580L; engine, exhaust, hydraulic tank, and filter kits are where they diverge.
The Case 580 Super L is the turbocharged version of the L-generation Construction King small-frame backhoe loader. It came to market in 1995 alongside the naturally aspirated 580L and ran through 2000. The Super L carries the Cummins 4T-390 turbocharged four-cylinder diesel forward from the 580 Super K — output rated at approximately 86 HP net / 91 HP gross — paired with the redesigned L-generation cab and the same 17-spline hydraulic pump architecture used on the 580L.
The defining factual distinction within the 580 Super L production run is the Series I vs. Series II split at serial JJG0258465. Series II introduced an optional Powershift transmission, a different hydraulic tank configuration, and revised filter kits. Several major service parts have different part numbers between Series I and Series II — the filter maintenance kit, hydraulic tank, and Powershift controller being the most consequential.
At-a-glance specifications
Case 580 Super L — factory specifications
- Production years
- 1995 – 2000
- Series split
- Serial JJG0258465 — Series I (before) / Series II (after)
- Sibling (same era)
- Case 580L (naturally aspirated)
- Predecessor
- Case 580 Super K (1987 – 1994)
- Successor
- Case 580 Super M (2001 – 2008)
- Engine
- Cummins 4T-390 (4BT 3.9L, turbocharged)
- Displacement
- 239 cu in (3.9 L)
- Cylinders
- 4, turbocharged, liquid-cooled, direct-injection diesel
- Power
- ~86 HP net / ~91 HP gross
- Transmission (Series I)
- Case 4-speed power shuttle, single-stage torque converter
- Transmission (Series II option)
- Powershift transmission with electronic controller (336551A1)
- Drive
- 2WD standard; 4WD optional (Carraro)
- Brakes
- Wet-disc multi-plate
- Hydraulic system
- Open-center, gear pump (17-spline shaft, shared with 580L and 580M)
- System pressure
- ~3,000 psi
- Operating weight
- ~15,000 – 17,000 lb (varies with configuration)
- Backhoe dig depth
- Up to ~14 ft (standard) or ~18 ft (Extendahoe)
- Loader breakout
- ~10,000 – 11,000 lb
- Cab
- Redesigned L-generation cab; optional A/C
How the Super L differs from the 580L
The Super L and 580L share their chassis, transmission base architecture, axles, brakes, hydraulics, cab, and most loader and backhoe iron. The differences are confined to the engine and supporting systems:
- Engine — Super L uses the Cummins 4T-390 turbocharged 4-cylinder; 580L uses the naturally aspirated 4-390. Same 239 cubic inch (3.9 L) block, same Bosch in-line injection pump architecture, but with different connecting rods, pistons, and head specifications to handle the turbo's pressure and heat.
- Turbocharger — only on the Super L. Wastegated turbo, oil supply and return lines, and exhaust plumbing are all Super L-specific.
- Muffler — Super L Series I uses 192483A1 (turbo muffler labeled "Series I ONLY"); Super L Series II uses a different exhaust configuration; 580L uses the 192928A1 non-turbo muffler. Three machines, three different mufflers.
- Filter kits — Super L Series I uses CS-580LI-FK; Super L Series II uses CS-580LIIT-FK. 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 — Super L Series I uses 130050A1 (Series I hydraulic tank); Series II uses a different tank configuration.
- Cooling system — slightly larger or higher-flow on the Super L to handle the turbo's heat load. The 185377A1 Super L fan is Super L-specific.
How the Super L differs from the Super K
The Super L is the L-generation continuation of the Super K turbocharged line. The defining changes:
- Cab and operator station — completely redesigned L-generation cab vs. the Super K's pre-L cab. Better visibility, refined controls, improved HVAC.
- 17-spline hydraulic pump shaft — the Super L (like the 580L) uses a 17-spline pump shaft. The Super K uses a different spline configuration. Pumps do NOT interchange between K and L generations.
- Refined hydraulic plumbing — updated hose routing and control valve refinements.
- Series II Powershift option — Super L Series II introduced an optional Powershift transmission with electronic controller. The Super K was power-shuttle only.
- Same engine — Cummins 4T-390 continues unchanged from Super K. Engine internals interchange.
- Same wet-disc brake architecture — continues from Super K.
The Cummins 4T-390 turbocharged engine
The Super L's Cummins 4T-390 is the same turbocharged 4BT used on the Super K, with calibration refinements for emissions and durability targets. The wastegated turbocharger is the most common engine-service item that distinguishes the Super L from the naturally aspirated 580L. Symptoms of turbo wear: blue smoke at startup or under throttle, oil consumption, audible whine outside the normal pitch range, or visible shaft play. Plan on a turbocharger rebuild or replacement as a baseline restoration step on any unrestored Super L.
The broader Cummins 4BT parts ecosystem applies to the Super L: pistons, rings, bearings, head gasket sets, water pumps, oil pumps, and many valve train components source through both Case-branded and Cummins B-series industrial channels. This is one of the more parts-supportable older Case backhoe engines.
Series II Powershift transmission
The Super L Series II introduced an optional Powershift transmission — a meaningful upgrade from the standard Power Shuttle. The Powershift uses an electronic controller (336551A1 in our catalog, explicitly labeled "580 Super L Series II, 590 Super L Series II") to manage clutch-free shifting under load, with direction changes accomplished electronically rather than through the column-mounted shuttle lever.
If your Super L is Series II and has the Powershift option, the 336551A1 controller is the standard fix when the transmission goes into limp mode or refuses to shift cleanly. The Power Shuttle remained the standard transmission on both Series I and Series II machines; the Powershift was an additional-cost option on Series II.
Verified top-selling 580 Super L parts
The parts table below leads with the items our 580 Super L customers actually buy, ranked by 12-month sales volume. Many parts cross-fit with the 580L, the 580M, and certain 590 Super L items — those cross-references are clearly labeled.
| Part # | Part | Why it's relevant |
|---|---|---|
| 232366A1 | Upper radiator hose (580SL) | Our #1 Super L parts seller — 68 units sold over the last 12 months. 45 mm × 270 mm upper radiator hose. Original hoses harden and crack over 25+ years. |
| 175978A1 | Needle bearing (pack of 10) | 42 units sold. Wide-fitment needle bearing for 570LXT, 580L, 580M, 580SL, and 585G/586G/588G forklifts. Small-dollar high-volume service item. |
| CS-580LIIT-FK | Filter maintenance kit (Super L Series II) | 30 units sold at $7,322 revenue. Series II filter set — engine oil, fuel, air, and hydraulic filters. ONLY for Super L machines after JJG0258465. |
| CS-580LI-FK | Filter maintenance kit (Super L Series I) | 30 units sold at $7,260 revenue. Series I filter set — for Super L machines before JJG0258465. Do NOT use on Series II machines. |
| 100753A1 | Backhoe spring (multi-machine) | 25 units sold. Wide-fitment spring — cross-fits 580L, 580 Super L, 590 Super L, and 570LXT. Small but high-frequency service item. |
| 185377A1 | Super L fan | 18 units sold. Super L-specific cooling fan. Larger or higher-flow than the 580L fan to handle the turbo's heat load. |
| 192483A1 | Turbo muffler (Super L Series I + 570LXT) | 17 units sold at $3,051 revenue. Series I ONLY turbo muffler — also fits 570LXT and 580L turbo-equipped configurations. Do NOT order for Super L Series II. |
| 139808A1-R | Rebuilt swing cylinder (580SL) | 12 units sold at $15,803 revenue. Rebuilt swing cylinder for the Super L. The swing cylinder cycles every time the boom moves laterally — high-cycle hydraulic component. |
| 87433897 | Hydraulic pump (580SL + 580SM) | 8 units sold at $11,317 revenue. The Super L hydraulic pump that crosses to the Super M. High-dollar service item. |
| 233817A1 | Hydraulic oil cooler (580L / 580SL / 590SL) | 4 units sold at $4,422 revenue. New hydraulic oil cooler with steel flanges. Cross-fits 580L, 580SL, and 590SL. |
| D138954R | Rebuilt 2WD front axle (580K / SK / L / SL) | 4 units sold at $14,500 revenue. Complete rebuilt 2WD front axle. Cross-fits 580K, 580SK, 580L, and 580SL — same axle architecture across K and L generations. |
| 130050A1 | Hydraulic tank (Super L Series I) | 3 units sold at $7,395 revenue. Series I ONLY hydraulic tank. Series II uses a different tank configuration. |
| 144200A1-R | Boom cylinder (rebuilt OEM, Super L) | 3 units sold at $5,973 revenue. Rebuilt OEM boom cylinder for the Super L. The boom cylinder cycles every dig and lift operation. |
| 336551A1 | Powershift controller (Series II option) | 3 units sold at $1,944 revenue. Series II Powershift option ONLY. Cross-fits Super L Series II and 590 Super L Series II. Standard fix when the Powershift transmission goes into limp mode. |
| 244536A1-U | Inner dipper (used, 580SL + SM) | 2 units sold at $5,690 revenue. Used inner dipper stick for the Super L and Super M Extendahoe configurations. |
| K3592015R | Super L turbocharger (reman) | 2 units sold at $1,382 revenue. Remanufactured turbocharger for the 580SL turbo engine. The most important Super L-specific service item that distinguishes it from the 580L. |
| 119129A1K | Loader lift cylinder to chassis pin kit (580L + Super L) | 2 units sold. Pin and bushing kit for the loader lift cylinder mount at the chassis. Cross-fits 580L and 580 Super L. |
| 113629A1K | Loader lift cylinder to loader frame pin kit | 2 units sold. Pin and bushing kit for the loader lift cylinder mount at the loader frame. Cross-fits 580L and 580 Super L. |
| 175251A1 | Loader bucket tilt cylinder seal kit (580L + 580M) | Major-volume seller (136 units across the 580L family last 12 months). Loader bucket tilt cylinder seal rebuild kit. Cross-fits 580L, 580M, and works on the Super L chassis. |
| 199721A1 | Stabilizer cylinder (Super line) | Stabilizer cylinder. Cross-fits 580SK, 580SL, and 580SM — the full Super-line. |
For a comprehensive Case 580 Super L parts inventory beyond these top-sellers, browse the Case backhoe loader parts hub or consult the related Case 580L spotlight for cross-fit items that work on the Super L chassis.
Common issues and what to expect
Turbocharger wear (Super L-specific)
The 4T-390 wastegated turbocharger is the most common service item that distinguishes the Super L from the naturally aspirated 580L. The K3592015R reman turbo is the verified replacement. Replace at the first sign of bearing wear — a failed turbo can ingest its own compressor wheel.
Series I vs Series II parts ordering
The most common parts-ordering mistake on a Super L is ordering the wrong-series part. Filter kits, hydraulic tanks, mufflers, and Powershift parts differ between Series I and Series II. Always confirm serial number against the JJG0258465 split.
4T-390 engine wear
Same engine family as the Super K. Common items on 25-plus-year-old turbo engines: head gasket failure, injector wear, lift pump diaphragm failure, water pump shaft bearing wear, and the turbocharger items called out above.
Hydraulic cylinder seal failure
Every cylinder on a 25-plus-year-old Super L has seals well past expected service life. The 175251A1 loader bucket tilt cylinder seal kit is the highest-volume seal kit; the broader Super L cylinders (boom, dipper, swing, stabilizer, bucket) all benefit from periodic reseal.
Cooling system service
The 232366A1 upper radiator hose is one of our top Super L sellers — 25-year-old hoses harden and crack. Replace the lower hose at the same time, and inspect the 185377A1 cooling fan and the hydraulic oil cooler (233817A1).
Powershift transmission service (Series II option)
If your Super L Series II has the optional Powershift, the 336551A1 controller is the standard service item when transmission shifting becomes erratic. The Powershift's internal mechanical components are durable; controller failures or wiring harness issues account for most service complaints.
4WD front axle wear
Carraro 4WD front axles see heavy steering loads under loader work. The D138954R rebuilt 2WD front axle is the cost-effective fix for 2WD machines past piecemeal repair; 4WD axles have their own service items and rebuild paths.
Wet-disc brake wear
Continued from the K-generation. After 6,000–8,000 hours of service, wet-disc brakes wear out — the L-generation brake architecture is similar to the K-generation.
Working on a Case 580 Super L?
The Super L's Series I vs Series II split is the most consequential parts-ordering fact about the machine. Our parts specialists can verify series and turbo fitment by serial number and walk you through cross-references to the 580L, 580M, and 590 Super L.
Mon – Fri, 7:00 AM – 5:00 PM CT
Request a PartWhere the 580 Super L sits in the Construction King family
The 580 Super L is the L-generation turbocharged Construction King small-frame backhoe loader. It sat alongside the naturally aspirated 580L from 1995 through 2000. Before the Super L came the 580 Super K with the same 4T-390 engine on a pre-L cab. After the Super L came the 580 Super M (2001–2008), which replaced the Cummins 4T-390 with the Case 445T/M engine and continued the L-generation cab and hydraulics forward. The 590 Super L sat above the Super L on a larger chassis with the same 4T-390 engine.
