Model Spotlight

Case 580C Construction King: Specs, Parts & Common Issues

Produced 1975 through 1980 — the model where Case bumped the 580 line up to the larger G207D 207-cubic-inch diesel and replaced the external band brakes with bonded discs in drum. Also the production-transition era between split-piston (G3) and one-piece (G1) hydraulic cylinder designs.

BT

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

The Case 580C replaced the 580B in 1975 and ran through 1980. Three things changed between the 580B and 580C, and all three matter for parts buyers: the engine moved up from the G188D 188-cubic-inch diesel to the larger Case G207D 207-cubic-inch diesel; brakes moved from the external band design to hydraulically actuated bonded discs in drum housings; and Case began the production transition from two-piece (G3) split pistons to one-piece (G1) pistons in hydraulic cylinders mid-run.

This guide covers the verified specifications, where to find the serial number, the engine and drivetrain options, the new bonded-disc brake architecture, the G1 vs. G3 piston identification protocol that determines which seal kits fit your machine, the failure modes 580C owners report most often, and the parts we stock with confirmed 580C fitment.

At-a-glance specifications

Where to find the serial number plate

The 580C tractor serial is stamped on a data plate on the left side of the dashboard inside the cab, or alternately on the left frame rail under the cab door. The G207D engine serial is stamped separately on the left side of the engine block.

Production years and serial numbers

The Case 580C was produced from 1975 through 1980. The 1975 model-year run was short — only about 150 units before the model-year break.

Engine and powertrain

The defining engine change on the 580C is the move from the 580B's G188D 188 cubic-inch diesel up to the larger Case G207D 207 cubic-inch diesel. Both are inline four-cylinder naturally aspirated indirect-injection engines, but the G207D has a larger bore (4.00 in vs. 3.82 in) and produces approximately 50 HP net / 55 HP gross at 2,100 rpm with about 160 lb-ft of torque. Fuel system is the Roosa Master / Stanadyne DBG rotary injection pump.

Two transmission options were offered factory:

• 4-speed mechanical shuttle — single dry clutch, manual shuttle lever.
• 4-speed power shuttle — torque converter and hydraulic clutch packs. Tip for identifying power-shuttle 580Cs: look for two small hydraulic lines at the lower radiator tank (cooler feed and return for the TC).

Bonded-disc brakes (new on the 580C)

The 580C introduces a major brake architecture change: out go the external contracting band brakes that the 580B, 580CK, 480B, and earlier Construction King models used, and in come hydraulically actuated bonded discs running inside drum-style housings. Two master cylinders at the operator station each feed a slave cylinder on the rear axle that applies a bonded disc against the drum.

This is not the same as the multi-plate wet-disc system that arrived on the 580K and 580 Super L generations later — the 580C disc runs dry inside a sealed housing. Common 580C brake failures: master cylinder seal failure (sponge pedal), slave cylinder leakage, brake-side oil contamination from worn axle seals (kills friction), and lining glaze on machines that haven't been worked regularly.

G1 vs. G3 hydraulic piston identification

The 580C straddles Case's production transition from two-piece (split) hydraulic cylinder pistons to one-piece pistons. Early-build 580Cs (1975 through ~1977) commonly carry two-piece G3 pistons identical to 580B parts; late-build 580Cs (1978–1980) commonly carry one-piece G1 pistons. Seal kits are not interchangeable.

Identification: the G1/G3 stamp is on the flat face of the gland nut on each cylinder. The transition is not strictly serial-bound — a single mid-production 580C may have a mix of G1 and G3 cylinders. Read each cylinder's stamp individually before ordering its seal kit.

Loader and backhoe capacities

Common problems documented by owners

Power shuttle forward clutch burn-up

Most-reported 580C drivetrain failure on power-shuttle units. Forward clutch wears first (it does all the loader work); reverse pack typically looks new at teardown. Always flush the oil cooler when rebuilding and replace the torque converter — debris from a burned forward clutch contaminates the entire shuttle.

G207D head gasket weeps and sleeve cracking

Recurring failure point on the G207D, especially after overheating from radiator scale buildup. Coolant in the oil or external seepage at the deck. Sleeve protrusion height is critical on rebuild — if sleeves don't protrude correctly, the new gasket fails in hours. Cracked sleeves between cylinders can leak coolant into the cylinders themselves.

Brake master cylinder failure

Sponge pedal, won't hold, fluid loss. By machine age, master cylinder bores are pitted from corrosion or wrong-fluid use. Replacement (not rebuild) is the practical fix. Both masters and the matching slaves typically need to go together.

Brake-side oil contamination

Rear axle seal failure lets oil migrate into the brake housing. Friction lining glazes, brakes fade or fail entirely even with new cylinders. Always check the axle-side seals when servicing the 580C brake assemblies.

Wrong seal kit ordered for cylinder piston style

The G1/G3 piston transition mid-production means the first parts return on the 580C is often "wrong seal kit." Verify the gland nut stamp before ordering.

Hydraulic pump coupler spline wear

Deteriorated rubber motor mounts allow the engine to sag, which misaligns the pump drive coupler and strips the splines. Replace mounts whenever servicing the pump.

Steering motor / orbital wear

Loss of lock-to-lock control, drift, or excessive play at the wheel. The 5-line hydraulic steering motor (D89898 cross-fits 480C / 480D / 580C) is the common replacement.

Pin and bushing wear

Loader pivots, swing tower, dipper and bucket links — universal at this age. Complete pin and bushing kits for every joint on the 580C backhoe and loader are stocked.

Verified replacement parts

Browse by 580C-fit category

• Brakes — 480C, 580C, 584C, 585C, 586C
• Hydraulic Cylinder Seal Kits — 580C, 580D, 580E, 580 Super E
• Split-Piston Seal Kits — 580B and Early 580C
• Rear Axle & Differential — 480C, 480D, 580C, 580D
• 580C Pin Kits — all joints
• Case 580C Backhoe Filters
• Case Backhoe Parts — full catalog

Maintenance schedule

Related Case Construction King models

Frequently asked questions

What years was the Case 580C made?

1975 through 1980. The 1975 model year was a short partial run — about 150 units — before the model-year break.

What engine is in a Case 580C?

The Case G207D — a 207-cubic-inch four-cylinder naturally aspirated diesel rated approximately 50 HP net / 55 HP gross at 2,100 rpm. This is the engine-upsize point on the 580 line; the 580B used the smaller G188D 188 ci.

Is the 580C engine the same as the 480C?

No. The contemporary 480C kept the smaller G188D 188-cubic-inch diesel. The 580C moved up to the G207D 207 ci. The two engines share the same family but pistons, sleeves, head gasket, and connecting rods are different.

Does the 580C have a power shuttle?

Both options were offered factory. 4-speed mechanical shuttle with dry clutch, or 4-speed power shuttle with torque converter and hydraulic clutch packs. Look for two small hydraulic lines at the lower radiator tank to identify power-shuttle units.

What kind of brakes does the 580C have?

Hydraulically actuated bonded discs running inside drum housings — new on the 580C and replacing the external band brakes that the 580B used. This is not the same as the multi-plate wet-disc system that arrived later on the 580K and 580 Super L.

What is the G1 vs. G3 stamp on Case cylinders?

G3 marks a two-piece (split) piston, common on early-production 580Cs from 1975 through about 1977. G1 marks a one-piece piston, common on late-production 580Cs from 1978 through 1980. Seal kits are not interchangeable. Read the gland nut stamp on each cylinder before ordering its kit.

How deep does the 580C backhoe dig?

14 feet with the standard backhoe attachment. The Extendahoe option extends the dipper hydraulically for greater reach.

Where is the serial number on a Case 580C?

Stamped on a data plate on the left side of the dashboard inside the cab, or alternately on the left frame rail under the cab door. The G207D engine serial is stamped separately on the left side of the engine block.