2001 Hitachi EX8/EX12/EX15/EX22/EX30 Excavator Technical & Workshop Manuals (P/N KM580E-01 T580-01)

This 2001 Hitachi technical and workshop manual set covers the EX8, EX12, EX15, EX22, and EX30 excavators. The covers carry KM580E-01, with T580-01 identifying the technical volume and W580-01 the workshop volume.

The set is supplied as a single 730-page PDF scanned from printed pages. It has no embedded text layer, so the page content is not searchable.

• Hydraulic components: Pump device, control valve, and swing motor disassembly and reassembly, with hydraulic tank construction, hydraulic circuit schematics, and component section views.

• Undercarriage and attachments: Travel device overhaul, center joint and track adjuster removal and installation, plus front attachment service and wear limits.

• Engine repair: Kubota and Isuzu diesel engine disassembly, internal inspection, and reassembly, supported by lubrication, cooling, fuel-system, and adjustment data.

• Performance testing: Factory engine and excavator tests, hydraulic component tests, and diagnostic flowcharts for sluggish operation, drift, mistracking, and starting faults.

• Electrical troubleshooting: Wiring diagrams, harness checks, starter and charging system tests, and monitor panel circuits for gauges, warning indicators, and buzzers.

• Specifications: Dimensions, operating weights, working ranges, fluid capacities, lubricant recommendations, component torques, and comparison matrices for configuration and interchangeability checks.

This set is suited to mechanics familiar with hydraulic pressure testing and engine measurement work, with access to the specified gauges, lifting equipment, and special tools.

Model Variants and Diagnostic Tests

The specification matrices distinguish canopy and cabin configurations, rubber and grouser shoes, and triangular track variants. Cabin data covers the EX12, EX15, EX22, and EX30.

The EX8 uses mechanical controls without a pilot circuit; the larger models have pilot-operated front attachment and swing functions. Main and pilot piping diagrams show the differing arrangements, including pilot and lock valves and the EX22/EX30 travel-speed solenoid valve.

Serial-specific tests: Main-relief data changes at EX8 serial 303, while blade-lever force specifications change at EX22 serial 271 and EX30 serial 654.

Diagnostic flowcharts connect weak or drifting functions with pilot-control, control-valve, and cylinder checks, helping narrow the fault before selecting a repair procedure.

Hydraulic and Undercarriage Repair

Pump coverage separates the tandem gear-pump arrangements from the EX30 variable-displacement main pump and pilot gear pump. Swing gear and travel device section views accompany the overhaul procedures.

The workshop instructions flag control-valve spool damage from improper clamping. Travel-device work includes bearing-preload adjustment and identifies the ST3146 bearing-nut wrench.

Swing-bearing construction and replacement, track-link service, and roller/idler wear checks extend the undercarriage coverage. Hydraulic-cylinder coverage is limited to removal, installation, and rod wear checks.

Hydraulic and lifting work requires the manual's precautions for trapped pressure, raised attachments, and suspended components.

Kubota and Isuzu Engine Repair

The EX8 engine section covers the Kubota Z482-B; the Isuzu sections cover the 3KC1 in the EX12/EX15, 3KR1 in the EX22, and 3KR2 in the EX30.

Cylinder-head, valve-train, piston, connecting-rod, and crankshaft repair includes inspection limits and reassembly details. The Kubota instructions flag scratched chrome-plated piston rings as a potential cause of trouble inside the liner.

The 894409-7060 valve setter is listed for Isuzu valve-clearance adjustment. Engine performance curves accompany inspection tables with standard dimensions and repair limits.

Fuel, Cooling, and Lubrication Service

Fuel-system material covers injection timing, nozzle testing, and governor service. Isuzu governor work requires an engine performance test after reassembly.

Lubricating-oil and coolant-flow diagrams support oil-pump, water-pump, and thermostat service. Refill-capacity tables and lubricant recommendations address the different engines and ambient temperatures.

Electrical Repair and Circuit Checks

Harness-check sections use battery-circuit test charts and component-location drawings. The EX8 engine material adds starter overhaul, regulator checks, glow-plug testing, and charging-system schematics with wire-color identification.

Monitor-system troubleshooting covers fuel and coolant indications, engine oil pressure, air-filter warnings, and the hour meter.

Machine Dimensions and Lifting Data

Working-range drawings and SAE J1097 lifting-capacity charts distinguish the machine configurations. Model comparison and interchangeability tables cover component differences across the EX series, including engines, control valves, and piping.

File Format and Readability

The technical volume occupies 288 pages (PDF pages 1–288), and the workshop volume occupies 442 pages (PDF pages 289–730). Both front covers, both back covers, and 58 blank or header/footer-only pages are already included in the 730-page total.

The 339 embedded PDF bookmarks provide access into both volumes and the engine sections. Small terminal and component labels in the horn, hydraulic piping, and dense charging-system diagrams benefit from zooming; scan linework varies in sharpness.