Hitachi EX75UR-3 Excavator Operator's Manual 1999–2005 (P/N EM10V-EN1-3)

The Hitachi EX75UR-3 Operator’s Manual, P/N EM10V-EN1-3, covers machines with Serial No. 010001 and up. This is the operating and maintenance publication, not the full workshop repair manual.

PDF Bookmarks and Diagram Viewing

Text search and diagram detail: The manual text is not searchable. Embedded bookmarks provide chapter navigation. Small electrical-diagram labels require zooming.

One printable PDF contains 248 pages, including the original front and back covers and 14 blank or memo pages.

Machine Controls, Scheduled Service, and Fault Finding

The following selected topics show the manual’s coverage rather than reproduce its full contents. Other subjects include engine break-in and maintenance for dusty, coastal, and freezing conditions.

• Machine operation: ISO-pattern controls, offset pedal and switch, auto-idle, travel-speed selection, E (Economy) mode, and Swing Precision mode.

• Collision prevention and work-range setup: AUTO-MARCCINO operation, after-start function checks, bucket-tip monitoring, reference-line and relative-distance displays, and height, depth, and offset limits.

• Scheduled maintenance: Greasing, engine oil and filter changes, swing and travel reduction gear service, air-cleaner maintenance, cooling-system care, batteries, fuses, and air-conditioner checks.

• Hydraulic and fuel service: Hydraulic oil and filter changes, suction-filter cleaning and replacement, pilot-filter replacement, fuel-system bleeding, feed-pump strainer cleaning, and hydraulic air removal.

• Bucket and crawler work: Step-by-step procedures for bucket-tooth and bucket replacement, bucket-linkage shim adjustment, track-sag adjustment, and requirements for steel/rubber crawler conversion.

• Troubleshooting and drawings: Engine, electrical, hydraulic, and control-system fault tables, a hydraulic circuit layout, an electrical circuit diagram, working-range drawings, and lifting-capacity charts.

This manual suits qualified, experienced operators; Hitachi specifies operator licensing under local law and officially licensed personnel for inspection and service.

Collision Protection and Work-Range Controls

The operator’s-station section maps the monitor and switch panels, pilot control shut-off lever, emergency deactivation and redundant switches, engine stop knob, fuse box, travel controls, blade controls, and optional heater/air-conditioner equipment. Identification drawings locate the machine/PIN, engine, travel-motor, swing-motor, and hydraulic-pump numbers.

The collision-control section explains bucket/cab warning and automatic-stop behavior, AUTO-MARCCINO combined-operation logic, and work-range setting, resetting, and cancellation. Height and depth restrictions limit boom movement; they do not independently restrict arm or bucket movement. The bucket-tip display provides an approximate working reference.

These systems are matched to the installed front attachment. A special bucket may prevent AUTO-MARCCINO from operating normally, and front-attachment replacement requires dealer readjustment of the collision-prevention system. Incorrect setup can allow the bucket to strike the cab.

Travel, Transport, and Operating Safety

Operating guidance covers slope travel and parking, soft ground, water or mud, short-distance towing, shackle use, trailer loading and unloading, and transport tie-down. Machine-lifting arrangements distinguish offset-boom and mono-boom configurations.

Object handling is covered for appropriately equipped machines. The manual also addresses overhead-line precautions, emergency exit through the front or rear window using the cab hammer, blade/bucket interference, offset-operation limits, rubber-crawler handling, and overnight or long-term storage.

Before maintenance, the attachment must be lowered, the pilot controls locked, residual hydraulic pressure released, and the machine properly supported for raised-track work. The track-adjuster and hydraulic sections identify high-pressure grease and fluid hazards.

Maintenance Planning and Routine Repair

The maintenance guide groups service by system and operating interval. Recommended fuels and lubricants, fluid capacities, periodic-replacement tables, and special-environment guidance support routine service planning. A general tightening-torque chart is supplemented by machine-specific fastener checks.

Hydraulic and fuel systems: Service instructions distinguish flat-face O-ring fittings from metal-face-seal fittings and include hose, line, and oil-cooler inspection criteria. A defective flare cannot be repaired by overtightening. Hydraulic filter inspection also explains how metal particles or rubber debris can indicate component deterioration.

Fuel-system bleeding is described separately for normal temperatures and cold weather. The hydraulic oil-change procedure includes pump filling and air removal; starting with an unfilled hydraulic pump can damage it.

Cooling and electrical maintenance: Procedures cover coolant replacement, fan-belt inspection and adjustment, radiator and oil-cooler cleaning, battery checks, and fuse replacement. Air-conditioner coverage includes refrigerant sight-glass checks, belt inspection, and condenser cleaning.

Buckets and undercarriage: The linkage section explains the split-shim arrangement and warns that incorrect shim placement can damage the arm end face or bolts. Rubber-crawler guidance covers oil contamination, sharp-rock damage, and the risks of traveling on one track while the other is raised.

Crawler conversion requires different track adjusters and dealer involvement. Configuration tables distinguish offset and mono booms, rubber crawlers and grouser shoes, and compatible bucket/arm combinations. The often-replaced-parts table lists Hitachi numbers for filters, the fan belt, and standard bucket wear parts.

Troubleshooting and Service Limits

First-line troubleshooting covers engine no-start and shutdown problems, low oil pressure, irregular running, overheating, starter and alternator faults, monitor problems, low hydraulic power, weak front-attachment performance, mistracking, and reduced swing performance.

The control-system table relates warning-indicator behavior and electronic beep patterns to normal automatic stops, deactivated safety functions, power-supply trouble, solenoid faults, and angle-sensor faults. This helps distinguish a normal work-range stop from a control-system fault before dealer service is arranged.

Injection-nozzle checks, cylinder-head-bolt retightening, valve-clearance adjustment, injection-timing checks, and compression testing are scheduled dealer tasks, without step-by-step procedures for those jobs. Further engine troubleshooting is referred to the separate Nissan Diesel Engine Operation Manual.

Hydraulic and electrical component adjustment, disassembly, and repair are reserved for dealer service. Full engine, pump, valve, travel-motor, and swing-motor teardown and overhaul procedures are outside this operator-level publication.

Selected Fan-Belt and Bucket-Wear Specifications

The fan-belt section specifies 8–12 mm deflection under approximately 98 N (10 kgf), measured midway between the fan and alternator pulleys.

For the bucket tooth illustrated in the maintenance chapter, dimension A is 156 mm when new, with an 80 mm limit of use. These dimensions accompany the tooth inspection and replacement illustrations.