1970s Case 580B Construction King Backhoe Loader Service Manual (Part No. 8-90721)

This Case 580B Construction King service manual covers diesel and spark ignition tractors, with separate repair material for mechanical shuttle, power shuttle, and hydrostatic configurations.

• Engine repair: Compression testing, cylinder-head service, valve and seat refacing, cylinder-sleeve inspection, crankshaft bearings, timing gears, oil pumps, and water pumps.

• Fuel systems: Roosa Master Model DB injection-pump installation and timing, injector testing and reconditioning, and Zenith Model 267 carburetor disassembly and adjustment.

• Hydraulic diagnosis: Flowmeter tests, troubleshooting charts, relief-valve testing, equipment-pump repair, and loader, backhoe, stabilizer, and three-point hitch control-valve service.

• Drivetrain repair: Rockford and Twin Disc shuttle clutch packs, transmission and final-drive overhaul, hydrostatic-drive testing, traction-clutch service, and independent PTO repair.

• Steering and brakes: Power-steering pump and hand-pump service, steering-system bleeding, axle and wheel-bearing inspection, differential brakes, differential lock, and parking-brake adjustment.

• Loader and backhoe: Tractor splitting, attachment removal, swing-tower service, extendable dipper work, cylinder repair, return-to-dig adjustment, Hydra-Guide, and boom lockout.

• Electrical reference: Diesel and spark ignition wiring diagrams, connector views, wire-color tables, accessory circuits, and separate forklift electrical information.

Suited to mechanics familiar with tractor splitting and equipped for hydraulic pressure testing and precision component inspection.

Engine Inspection and Rebuild Details

The engine chapters cover cylinder-head disassembly, rocker arms, valve guides, springs, and seat grinding. Diesel head-service information relates fire-ring selection to measured cylinder-sleeve protrusion; valve-refacing illustrations explain the interference angle and seat-contact requirements.

Block repair extends to piston rings, sleeve deglazing and honing, camshaft bushings, crankshaft inspection, bearing clearances, and oil-pump checks. Engine Lubrication diagrams trace the pressure-fed and metered oil paths.

Shared sections include 148G and 159G engine-block work. The spark ignition cylinder-head and valve chapter also includes the 201 engine; that coverage should be distinguished from the block chapter’s listed engine applications. General and component-specific torque tables cover main bearings, connecting rods, flywheel fasteners, and other serviced assemblies.

Injection, Carburetion, and Cooling

The Roosa Master DB material explains pump removal, drive-shaft sealing, installation, timing, and external speed adjustments. Governed-speed adjustments are identified as work for authorized Case dealers.

Injector coverage includes fault isolation, spray-pattern and leakoff testing, reconditioning, and final adjustment. Pump-installation cautions explain how flange damage or incorrect high-pressure line fastening can cause pump seizure.

Zenith Model 267 procedures apply to the 188G and 159G engines and address the float, idle mixture, load mixture, and magnetic fuel shut-off solenoid. Marvel-Schebler carburetor data for the 148G appears in the specification section. Cooling material covers water-pump service, thermostat checks, fan-belt adjustment, and cooling-system cleaning.

Shuttle, Hydrostatic Drive, and Final Drive

Separate Rockford and Twin Disc sections detail clutch packs, pistons, drums, and shafts. Twin Disc instructions explain why A43071 assembly clips matter: unsecured clutch plates can become trapped between the reverse hub and carrier.

Hydrostatic coverage includes unit removal, input gears, mechanical disconnect, neutral-cam and linkage adjustment, pressure checks, and troubleshooting. Internal hydrostatic pump and motor rebuilding is outside this repair coverage.

Transmission sections address keyed and flanged axles, differential bearings, backlash, and safety-start switch adjustment. Color-coded Rockford and Twin Disc operating diagrams explain oil flow through neutral, forward, reverse, and clutch-dump conditions.

Equipment Hydraulics and Attachment Service

Flowmeter procedures compare pump delivery with individual circuit performance, helping distinguish pump loss from control-valve or cylinder leakage before components are removed. Equipment-pump sections distinguish Cessna D48950, TRW D49241, and Webster D52271 units.

The Hydra-Leveling Circuit and Diagram of Hydra-Guide Hydraulic System explain attachment operation. Hydra-Guide material specifically identifies the 580B with the Model 35 backhoe and includes trigger-poppet testing and sensing-valve service.

Loader and backhoe chapters add bucket cutting-edge work, standard and twin-lever controls, extendable dipper assemblies, and hydraulic routing views. Working on pressurized hydraulic circuits and heavy driveline components carries inherent risks; follow the manual’s pressure-relief and support requirements before teardown.

Wiring Diagrams and Circuit Identification

Diesel Basic Loader Tractor Wiring and Code and Electrical Accessory Wiring and Code pair circuit references with wire colors and connection points. Forklift-specific material consists of electrical wiring and code tables.

A Sample of Valve and Injector Specifications

These values illustrate a small selection of the manual’s adjustment and test data.

For the 188D and 188G engines, cold intake-valve tappet clearance is specified at 0.014 inch. The related chapters provide valve inspection limits and adjustment information.

Roosa Master injectors for the 188 diesel have an opening-pressure specification of 2,750–2,850 PSI when new and 2,550–2,650 PSI after servicing. These are injector opening pressures, distinct from injection-pump settings.

PDF Search, Bookmarks, and Page Count

Search and diagram detail: Text search is limited to the title page and the engine-block contents page. Embedded chapter bookmarks provide section navigation. Small wiring labels and dense hydraulic cutaway labels require zooming.

Supplied as one printable, English-language, 649-page PDF. The total includes one added title page, two main contents pages, and 646 section pages; the title page is already included in the stated page count.