CASE 580C Loader Backhoe Service Manual, 1976 (P/N 9-66015)

This J I Case C.E. Division service manual covers the 1976 CASE 580C Loader Backhoe, February 1976 edition, P/N 9-66015. Shared engine repair sections cover 188 and 207 diesels; the general and detailed engine specifications are specifically for the 207 diesel.

PDF Access and Diagram Readability

Search, bookmarks, and small labels: Text search is limited to the added title page. Embedded PDF bookmarks provide section navigation. Small wiring labels require zooming, and some connector numbers remain blurred. Injector-test pages 3013-13 and 3013-14 appear out of sequence at PDF pp. 364–365.

Supplied as one printable English PDF with 773 pages, including one added title page and one blank page.

Diesel, Hydraulic, and Drivetrain Service

These selected topics outline the service coverage rather than reproduce the full contents list. Other sections cover ether injection and maintenance of noise-control materials.

• Engine repair: Step-by-step cylinder-head, valve-train, camshaft, crankshaft, oil-pump, wet-sleeve, piston, and connecting-rod procedures, with engine removal, installation, and run-in.

• Fuel system: Roosa Master DB injection-pump removal, timing, drive-gear backlash checks, governed-speed adjustment, injector isolation and servicing, filter replacement, and bleeding.

• Hydraulics: Pump overhaul, loader and backhoe control valves, three-point-hitch and stabilizer valves, boom lock, flowmeter diagnosis, hand-pump testing, relief-valve adjustment, and system flushing.

• Powertrain: Power Shuttle pressure diagnosis and overhaul, torque-converter replacement, two-speed mechanical-shuttle rebuilding, shuttle controls, transaxle service, differential-lock repair, driveshaft, and clutch work.

• Steering and brakes: Steering-pump, control-valve, and cylinder service; front-axle and wheel-bearing adjustment; master-cylinder repair; and self-adjusting differential-brake rebuilding.

• Electrical diagnosis: Starting- and charging-circuit troubleshooting, battery tests, starter and solenoid checks, alternator repair, instrument-panel service, wiring diagrams, and electrical accessories.

• Mounted equipment: Loader-arm and backhoe removal, swing-tower work, extendable-dipper service, hydraulic-cylinder resealing, and control-linkage adjustment.

Prepared as a shop reference for service technicians, this manual is suited to mechanics who understand diesel, hydraulic, and drivetrain service and have the lifting equipment, pressure gauges, measuring instruments, and injection-test equipment required for the repair.

Engine Diagnosis and Fuel-System Matching

The engine diagnosis chart works from hard starting, misfire, knock, overheating, power loss, oil consumption, and low oil pressure. Tune-up coverage connects these symptoms with compression tests, top-dead-center checks, valve adjustment, injector testing, pump retiming, and governor adjustment.

Inspection and maintenance: Tables provide component torques, clearances, wear limits, fits, capacities, approved lubricants, and test specifications. An interval-based maintenance chart covers the engine, hydraulic, shuttle, steering, transaxle, cooling, and brake systems.

Injector applications: Case and Roosa Master part numbers, nozzle construction, and color coding distinguish 188 and 207 injectors, helping prevent the mixing of similar-looking components. Filter-service and bleeding instructions distinguish arrangements prior to engine S/N 2718490 and starting with that number.

Named service equipment includes the M20520 injector tool kit, M20322 / Bacharach 65-934D injector test stand, and A41103 camshaft bushing tool kit.

Lubrication changes: Engine S/N 2072089 marks a change in rear camshaft-bushing oil-hole alignment and installed position; the rocker-arm section also distinguishes drilled mounting-bolt locations around this serial break. Mixing the layouts can restrict rocker-arm or camshaft lubrication.

Cooling service: Thermostat testing and replacement accompany radiator removal and installation. The water pump is serviced by unit replacement.

Shuttle Diagnosis and Transaxle Rebuilding

Power Shuttle oil-flow diagrams explain forward, reverse, and clutch-cutout operation. Gauge tests distinguish main-line, clutch, and converter-cooling pressures before internal inspection and clutch-component repair. The welded torque converter is replaced as a complete assembly; its internal parts are not individually serviced.

The installation section warns that forcing the Power Shuttle against the converter housing when the splines or pump-drive tangs are misaligned can damage internal parts.

Transaxle detail: Shaft and gear work extends to synchronizer and shifter assemblies, final drives, bearing preload, ring-and-pinion backlash, axle housings, and the differential lock. Separate center-wheel build-ups identify the 580C Loader/Backhoe, 480C Loader/Backhoe, and 580C Forklift arrangements. The 580C Loader/Backhoe side gears must not be substituted into the other applications described in the chapter because they will not mate correctly with the final-drive gears.

Hydraulic Fault Isolation and Attachment Work

Separate overhaul sections cover Cessna D48950 and TRW D49241 pumps. Flowmeter readings compare pump delivery with individual circuit performance to distinguish pump, valve, and cylinder-packing faults. Test-equipment drawings identify adapters 218-441 and 218-466.

Loader, backhoe, and three-point-hitch hydraulic diagrams accompany the troubleshooting charts. Exploded views show the pumps, loader, backhoe, and extendable dipper.

Attachment details: Bucket cutting edges and teeth, return-to-dig and antirollback linkage, stabilizers, control towers, and hand- and foot-swing arrangements receive separate treatment. Cylinder chapters cover disassembly, inspection, resealing, reassembly, installation, and post-repair bleeding for the applicable loader, backhoe, three-point-hitch, swing, boom, bucket, dipper, and stabilizer circuits.

Starting, Charging, and Wiring Coverage

Electrical procedures include starter no-load testing, armature and field-coil checks, solenoid tests, and battery capacity and cell tests. Prestolite and Delco-Remy alternators have separate disassembly, inspection, component-test, and reassembly coverage.

Wiring drawings include late-production Power Shuttle, mechanical shuttle, cab, and canopy-light circuits. Early-production Power Shuttle drawing missing: Printed page 8003-3 is absent; the Figure 1 component key remains in the file.

This is the factory service publication; the operator’s manual and parts catalog are separate references for certain operating information and replacement-part identification.

Before hydraulic testing or any repair beneath raised loader or backhoe equipment, relieve stored pressure and support the attachment with the prescribed stops or suitable stands.

Examples of Valve Clearances and Bearing Fits

For the 207 diesel, the specifications list cold valve tappet clearances of 0.012 inch for intake valves and 0.014 inch for exhaust valves. These values accompany the manual’s valve-adjustment coverage.

The same engine’s detailed specifications give a main-bearing oil clearance of 0.0012–0.0042 inch, alongside separately listed undersize service-bearing options for crankshaft repair.