Essential Fiat-Hitachi FB90.2 Backhoe Loader Workshop Manual (1056 Pages) | Shop Standards

Fiat-Hitachi FB90.2, FB100.2, FB110.2, FB200.2 4WS Workshop Service Manual

Fiat-Hitachi FB Series backhoe loaders require precision maintenance to sustain high-cycle performance in earthmoving and loading applications. This comprehensive workshop documentation provides the engineering logic and mechanical oversight necessary for professional-grade fleet management and complex repairs.

Professional Logistics & Delivery

Instant digital access ensures that critical technical data is available on-site or in the shop via mobile devices, tablets, or workstations. The searchable format allows for immediate navigation to specific hydraulic pressures or engine timing intervals, minimizing downtime during critical repair windows.

Compatibility & Scope

Engineered specifically for the Fiat-Hitachi Compact Line, this manual covers the FB90.2, FB100.2, FB110.2, and FB200.2 4WS models. It addresses various engine configurations including naturally aspirated and turbocharged New Holland powerplants, along with 4x4 Power Shuttle transmissions and high-flow Rexroth hydraulic systems.

Value & Field Utility

Eliminating guesswork during disassembly prevents costly component damage and ensures that all clearances and tolerances return to factory specifications. This resource serves as a foundational tool for both field mechanics and workshop supervisors, securing the long-term reliability of the machine's primary structural and mechanical assets.

Technical Information & Benchmarks

• Engine Logic: 4-Cylinder, 4987cm³ displacement, 1.3.4.2 firing sequence
• Compression Ratio: 17.5:1
• Injection Timing: 28-29° B.T.D.C. (Solenoid shut off)
• Main Hydraulic Relief: 196.5 - 202.5 bar
• Steering System: Hydrostatic at 140 bar
• Transmission Pressure: 13.7 - 15.2 bar
• Torque Converter Ratio: 2.54:1 (Turbo) / 2.63:1 (Naturally Aspirated)

Diagnostic Architectures

Comprehensive troubleshooting protocols facilitate the isolation of faults within the hydraulic circuitry, electrical harnesses, and propulsion lines. Detailed pressure testing procedures allow technicians to verify the efficiency of the twin gear pumps and the operational integrity of the stabilizer relief valves.

Mechanical Overhaul & Content

Step-by-step procedures detail the removal and installation of major assemblies, including the New Holland propulsion units, Lucas DPS fuel injection systems, and Rexroth hydraulic componentry. Specialized sections cover cab disassembly, including internal and external trim, roof panels, and windscreen wiper configurations.

Integrated Schematics

Full-scale wiring diagrams and hydraulic flow charts map the complex interconnection of technical systems. These visual guides are essential for tracing electrical continuity through the fuse box and relay logic, as well as understanding the flow pathways between the control valves and the inboard planetary rear axles.

FAQ

Question: Engine and drivetrain repair coverage for FIAT-HITACHI FB Series?

28-29° B.T.D.C. is the specific injection timing required for naturally aspirated New Holland engines within the FB90.2 series. Detailed overhaul procedures for these 4-cylinder powerplants are located in Section 10, including specifications for the 17.5:1 compression ratio and 1.3.4.2 firing order. Transmission support covers both 4x4 Power Shuttle and Powershift configurations, requiring a system pressure between 13.7 and 15.2 bar for reliable operation. Technical data in Section 21 ensures precise maintenance of torque converter ratios, specifically 2.63:1 for non-turbo units and 2.54:1 for turbocharged models.

Question: Relationship between Print 604.13.028 and other FIAT-HITACHI service volumes?

1056 pages comprise this comprehensive workshop volume, which serves as the primary technical reference for machine and engine repair. For a complete service suite, technicians must also refer to the Operation and Maintenance Instruction Manual for daily fluid checks and the Spare Parts Catalog for component identification. Section 00 highlights that this manual is designed for skilled technicians, ensuring that all maintenance standards and installation procedures are met. Integration with these additional reference materials facilitates a total mechanical oversight of the FB100.2, FB110.2, and FB200.2 4WS series.

Question: Verification of FB90.2 series hydraulic and chassis schematic depth?

196.5 to 202.5 bar is the mandatory main relief valve pressure setting for Rexroth hydraulic systems as detailed in Section 35. This documentation ensures the integrity of the twin gear pump output, which supports both the main hydraulics and the hydrostatic steering system. Section 39 provides structural torque values, such as the 214 Nm required for front support cowling attachment to the chassis. Technical schematics facilitate the isolation of faults within the steering circuitry, which operates at a specific system pressure of 140 bar.

Question: Workshop compatibility for FIAT-HITACHI FB200.2 4WS components?

Section 25 and Section 27 contain the specialized overhaul data for 4-Wheel Steer (4WS) front and rear axles. Maintenance of the double reduction inboard planetary drive requires specific shimming techniques for the differential lock logic, which is electrically operated on these models. Brakes in the FB200.2 4WS series feature wet multi-discs with a 203.2mm diameter, requiring precise bleeding procedures found in Section 33. Proper torque application of 970 Nm for backhoe attaching bolts ensures the safety and stability of the machine's heavy-duty assembly.