Case 580C Backhoe Loader 1975–1980 Service Manual (P/N 9-66018)

J.I. Case service manual for 1975–1980 Case 580C backhoe loaders, P/N 9-66018. The contents and introduction are dated April 1981; individual service sections carry their own issue and revision dates.

PDF Access, Wiring Detail, and Page Count

Search and section access: The service chapters have no searchable text layer. Embedded section bookmarks provide access to the main service areas, although two parent entries have no page destination. Small wiring labels require zooming.

One printable PDF contains 803 pages: 797 manual pages, one added cover, and five PDF navigation pages. All six added front pages are included in the total.

Diesel Engine, Shuttle, and Loader-Backhoe Service

These selected service topics show the repair and diagnostic coverage. Additional subjects include ether injection and spark arresting muffler service.

• Engine repair: Engine diagnosis and removal, cylinder-head reconditioning, valve-train and camshaft service, crankshaft bearings, oil seals, and diesel engine lubrication.

• Fuel system: Roosa Master Model DB pump removal, installation, drive-gear service and timing, plus injector testing, servicing, and adjustment.

• Power train: Power shuttle overhaul, torque converter replacement, two-speed mechanical shuttle service, clutch and pressure plate repair, and transaxle work.

• Hydraulic systems: Flowmeter testing, relief-valve checks, hydraulic pump repair, control-valve service, cylinder overhaul, stabilizers, and the boom lock system.

• Steering and brakes: Steering pump, control valve and cylinder repair, front axle service, master cylinders, brake bleeding, and self-adjusting differential brakes.

• Electrical diagnosis: Starting- and charging-circuit tests, battery checks, starter and alternator service, wiring diagrams, and instrument panel and cluster information.

• Mounted equipment: Loader and backhoe removal, return-to-dig and antirollback adjustments, dipper extension service, three-point hitch work, and ROPS cab and canopy inspection.

This manual is suited to experienced service technicians equipped for pressure testing, precision measurements, and supported removal of heavy assemblies.

Engine Inspection and Diesel Fuel Service

The 580C specifications identify the 207 diesel engine; several component chapters also address the 188 diesel. The cylinder block, sleeves, pistons, and connecting rods section specifically covers the 207, with inspection limits and step-by-step replacement procedures.

Cylinder-head and camshaft instructions distinguish changes in rocker-arm lubrication and rear camshaft bushing installation. Detailed engine specifications, component torque references, and lubrication information support inspection and reassembly.

Injection equipment: Pump coverage centers on removal, installation, drive components, inlet-filter service, and timing rather than internal injection-pump overhaul. Injector coverage extends to opening-pressure, seat-leakage, spray-pattern, and leak-off tests, followed by servicing and adjustment.

Injector testing requires an approved test stand, identified as Case M20322, with injector tool kit M20520. The governed engine-speed adjustment instructions are expressly designated for authorized Case dealers.

The pump installation section warns that missing copper washers at the high-pressure line connectors can allow the connector bolts to enter too deeply and cause pump seizure.

Hydraulic Testing and Power Train Repair

Loader Hydraulic Diagrams, Backhoe Hydraulic Diagrams, and the Steering Hydraulic Diagram accompany system-specific troubleshooting. Flowmeter check sheets support recorded comparisons of pump efficiency and individual circuit leakage.

Separate repair instructions cover the Cessna D48950 and TRW D49241 hydraulic pumps. On the TRW pump, the end-cover seal package is serviced with the cover assembly.

Shuttle diagnosis: Power shuttle oil-flow diagrams and pressure-test interpretations distinguish regulator faults, clutch-circuit leakage, and converter-cooling restrictions before selecting an assembly for removal.

The welded torque converter is replaced as a complete unit; its internal parts are not individually serviceable. Forcing a misaligned power shuttle into position during installation can damage the assembly.

Chassis, Brakes, and Working Equipment

Transaxle procedures extend through gear and bearing inspection, differential lock service, and assembly adjustments. Front axle coverage includes wheel bearings, spindles, king-pin bearings, and toe-in adjustment.

Brake instructions distinguish power-shuttle and mechanical-shuttle pedal arrangements. Brake relining requires the specified riveting equipment; the manual directs this work to a suitably equipped service shop when those tools are unavailable.

Backhoe coverage includes swing-tower work, dipper extension removal, wear-strip replacement, and guide-block installation. Loader sections address cutting edges, bucket teeth, return-to-dig, and antirollback linkage.

Electrical Circuits and Component Tests

Power Shuttle Wiring Diagrams distinguish early and late production arrangements, alongside a separate Mechanical Shuttle Wiring Diagram. Wiring color keys and component references accompany the circuits.

Component sections cover the Nippondenso starter and both Prestolite and Delco-Remy alternators, with bench tests, inspection procedures, and repair information.

Preview: Thermostat and Injection-Drive Inspection Data

The diesel cooling-system inspection specifies that the thermostat should be fully open at 202°F.

The injection-pump drive inspection gives a maximum drive-gear-to-idler-gear backlash of 0.007 inch and explains that excessive backlash can cause erratic pump operation.

Working on heavy equipment presents inherent physical hazards. Always verify load limits, use proper lifting gear, and consult a certified heavy machinery technician before initiating major teardowns or servicing pressurized hydraulic networks.