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

• Covers the 1976 CASE 580C Loader Backhoe in a 773-page PDF, published by J I Case C.E. Division as Form No. 9-66015 in February 1976. Engine repair sections are labeled for both 188 and 207 diesel engines, while the general and detailed specification sections are specifically labeled for the 207 diesel.
• Details engine diagnosis and tune-up, cylinder head and valve-train work, camshaft service, crankshaft and main bearings, flywheel and oil seals, oil pump, wet sleeves, pistons and connecting rods, cooling, lubrication, engine removal, installation, and rebuilt-engine run-in.
• Separates Roosa Master DB injection-pump and injector applications for the two engines, with pump timing, drive-gear backlash, governed-speed adjustment, injector isolation and testing, nozzle service, fuel-system bleeding, and filter arrangements before and from engine serial 2718490.
• Breaks down the hydraulic system by Cessna D48950 and TRW D49241 pumps, loader and backhoe control valves, three-point-hitch valve, stabilizer valve, cylinders, and boom lock. Factory coverage includes flowmeter diagnosis, hand-pump testing, relief-valve checks and adjustment, system flushing, and troubleshooting charts.
• Includes Power Shuttle and torque-converter pressure diagnosis and overhaul, two-speed mechanical-shuttle service, shuttle controls, transaxle removal and rebuilding, differential-lock repair, driveshaft work, clutch service, master cylinders, self-adjusting differential brakes, steering components, and front-axle adjustment.
• Supplies system-level reference drawings: loader, backhoe, and three-point-hitch hydraulic diagrams; Power Shuttle forward, reverse, and clutch-cutout oil-flow diagrams; late-production Power Shuttle and mechanical-shuttle wiring; cab and canopy lighting schematics; and exploded views of the hydraulic pumps, loader, backhoe, and extendable dipper.

Factory Service Depth

This factory workshop manual was prepared as a shop reference for service technicians. It 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 being performed.

The engine diagnosis chart works from specific symptoms such as hard starting, misfire, knock, overheating, power loss, oil consumption, and low oil pressure. Tune-up coverage then ties those symptoms to compression testing, top-dead-center checks, valve adjustment, injector testing, fuel-pump retiming, and governor adjustment. Internal repair chapters carry the work through head and valve service, camshaft-bushing replacement, crankshaft inspection, bearing selection, sleeve replacement, piston and rod inspection, oil-pump service, and final run-in. Tables provide component-specific 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.

Named service equipment includes the M20520 injector tool kit, M20322 / Bacharach 65-934D injector test stand, A41103 camshaft bushing tool kit, and hydraulic-test adapters 218-441 and 218-466. Injector tables distinguish 188 and 207 applications by Case and Roosa Master part numbers, nozzle construction, and color coding, which helps prevent mixing components that look similar.

Drivetrain, Hydraulics, and Machine Equipment

The Power Shuttle material follows oil flow through forward, reverse, and clutch-cutout operation before moving into gauge testing, fault interpretation, removal, teardown, inspection, clutch-component service, reassembly, and converter replacement. The transaxle chapter covers shafts, gears, synchronizer and shifter assemblies, final drives, bearing preload, ring-and-pinion backlash, axle housings, and the differential lock. It specifically identifies the 580C Loader/Backhoe center-wheel and side-gear build; those side gears must not be substituted with 480C or 580C forklift parts because they will not mate correctly with the final-drive gears.

Loader and backhoe sections add bucket edges and teeth, return-to-dig and antirollback linkage, loader-arm removal, backhoe removal and installation, swing-tower work, dipper extension, stabilizers, control towers, and both hand- and foot-swing control arrangements. Hydraulic cylinder chapters cover removal, disassembly, inspection, resealing, assembly, installation, and post-repair bleeding for the applicable loader, backhoe, three-point-hitch, swing, boom, bucket, dipper, and stabilizer circuits.

Serial-Specific Cautions and Scope

The manual flags a lubrication-critical change at engine S/N 2072089: the drilled rocker-arm mounting bolt changes location, and the rear camshaft bushing uses a different oil-hole alignment and installed position. Mixing the two layouts can restrict rocker-arm or camshaft lubrication. It also warns that the Power Shuttle must seat by hand after its splines and pump-drive tangs are aligned; forcing the housings together can damage internal parts.

This is the factory service publication, not an operator's manual or parts catalog. It refers to those separate books for certain operating information and replacement-part identification. Printed page 8003-3 is not included in this PDF: the component key for early-production Power Shuttle Figure 1 is present, but the matching wiring drawing is absent. 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.