Need factory data for your W50, W60, or W70 wheel loader? This 594-page Fiat Kobelco W50, W60, W70 Technical Manual PDF (OEM #604.06.995.02) covers all three loaders in one book, front to back. Inside: full wiring diagrams with fault-finding charts, hydraulic circuit schematics for the hydrostatic travel drive, and step-by-step rebuild procedures for the A4VG pump and A6VM motor. You also get a dedicated service data section for each model, plus axle dismantling, Gleason backlash adjustment, steering, brakes, and frame work down to the main pivot. Set the working hydraulic primary relief at 210 bar, then torque the wheel nuts to 500 Nm before the machine rolls. A loader sitting dead over one missing spec is money burned. Bookmarked and keyword-searchable; pull it up on your phone, find the number, get back to work.
What's Inside This Fiat Kobelco W50, W60, W70 Manual
| System | Pages | Key Topics |
|---|---|---|
| Allgemein General | 21-60 | Si Units, Conversion Tables, Calculation Examples, Tightening Torques |
| Service Data W50 | 61-78 | W50: Engine, Axles, Transmission Gears, Hydraulic System, Service Fluids, Tightening Torques |
| Service Data W60 | 79-96 | W60: Engine, Axles, Transmission Gears, Hydraulic System, Service Fluids, Tightening Torques |
| Service Data W70 | 97-118 | W70: Engine, Axles, Transmission Gears, Hydraulic System, Service Fluids, Tightening Torques |
| Travel Drive | 119-145 | Hydrostatic Travel Drive, Hydraulic Circuit Diagram, Hydraulic Pump, Hydraulic Motor, Inching Valve |
| A4Vg | 147-186 | Sectional View, General Repair Instructions, Seal Kits, Pump Disassembly, Assembly |
| A6Vm | 187-226 | Cover Plate, Control Parts, Hydraulic Parts, Port Plate, Positioning Piston, Rotary Group |
| Axles | 227-326 | Front Axle, Axle Drive Assembly, Wheel Hub Assembly, Rear Axle Assembly, Brake Assembly, Differential Assembly |
| Steering | 327-346 | Steering Hydraulics, Priority Valve, Steering Cylinder, Steering Valve, Steering System |
| Brakes | 347-366 | Braking System, Accumulator Charging Valve, Pedal-Type Brake Valve, Connecting Valve, Inching Valve, Manometric Switches |
| Hydraulic System | 367-398 | Working Hydraulics, Control Block, Triple Pump, Lifting Cylinder, Dumping Cylinder, Quick Change Locking Cylinder |
| Electrical System | 399-416 | Electrical Components, Circuit Diagram, Wiring Diagrams |
| Fundamentals of Electrical Engineering | 417-470 | Atom, Power Generation, Battery, Alternator, Electric Motors, Starting Motor |
| Automotive Electrical Systems in Construction Machinery Interpretation of Wiring | 471-510 | Wiring Diagram, Checking Equipment, Testing Procedures, Troubleshooting, Fault-Finding Diagram |
| Frame | 511-516 | Main Pivot Parts, Dismantling, Mounting |
| Fittings, Pipes and Hoses | 517-570 | Steel Pipes, Hoses, Plastic Pipes, Pipe Couplings, Bulkhead Couplings, Flange Couplings |
| Sealing, Protective, Testing and Cleaning Agents | 571-594 | Preservation of Gearboxes, Preservation of Cylinder Piston Rods, Surface Sealing Agents, Liquid Thread Adhesives, Metal Adhesives, Surface Crack Checking Agent |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for SAE flange M10 | 60 Nm | p. 57 |
| Tightening torque for SAE flange M12 | 100 Nm | p. 57 |
| Working hydraulic primary relief pressure | 210 bar | p. 87 |
| Working hydraulic secondary relief tip cylinder piston side pressure | 220 bar | p. 87 |
| Precharging valve pressure | 0.5 bar | p. 383 |
| By-pass valve pressure | 2.5 bar | p. 383 |
| Charging voltage per cell | 2.3 to 2.4 volts | p. 433 |
| Admissible minimum voltage limit | 8 V | p. 434 |
| Charging voltage for 12 V system | 13 to 14.5 V | p. 431 |
| Charging voltage for 24 V system | 26 to 29 V | p. 431 |
| Round fuses nominal current | 5 A, 8 A, 16 A, 25 A | p. 457 |
| Strip fuses nominal current | 25 A, 30 A, 50 A, 100 A, 125 A, 150 A, 250 A, 35 A, 60 A | p. 457 |
Fiat Kobelco W50, W60, W70 Common Problems This Manual Covers
Fiat Kobelco W70 hydraulic oil runs hot, bucket lift slow and weak under full load
Check the hydraulic oil level cold on level ground; the W70 system holds 65L (page 110). Clean packed dirt off the oil cooler with compressed air, then pull the tank filter covered on page 383. Its by-pass valve opens at 2.5 bar, so a clogged element dumps hot, unfiltered oil straight back to tank. Replace it and retest.
Manual Section: Hydraulic System p. 365Wheel loader won't drive forward, travel response delayed, machine creeps on slopes
Check that the handbrake is fully released and the inching valve linkage moves freely before condemning the pump; the mechanical zero position procedure starts on page 128. Verify the pedal returns all the way, then test accumulator pre-charge, which should hold 50 bar (page 354). If it still creeps, trace the travel circuit on the schematic, page 122.
Manual Section: Travel Drive p. 128Engine cranks slowly and won't fire, worse on cold mornings after sitting overnight
Test battery voltage while cranking; anything below the 8 V admissible minimum (page 434) means recharge at 6 A or replace the battery. Clean both terminals to bright metal and tighten the clamps. If cranking speed is good but the engine still won't fire, work through the fault-finding diagrams starting on page 471, including the stop solenoid feed.
Manual Section: Automotive Electrical Systems in Construction Machinery Interpretation of Wiring p. 471Battery goes flat every few days, charge warning light glows dim at idle
Measure charging voltage at the battery with the engine at fast idle; a 12 V system should show 13 to 14.5 V (page 431). Below that, check V-belt tension and the regulator before replacing the alternator. Confirm each cell reaches 2.3 to 2.4 volts on charge (page 433); a cell that lags behind is sulfated, so replace the battery.
Manual Section: Fundamentals of Electrical Engineering p. 431Frequently Asked Questions
What are the replacement specifications for the battery?
The battery is a 12-volt system. For 24 V systems, the charge monitoring lamp must be a 2 W type to ensure appropriate excitation of the alternator. p. 439
What is the rated output of the engine for the W50 model?
The rated output for the W50 model engine is 41.5 kW at a rated speed of 2300 rpm. p. 67
What is the correct valve clearance for the engine?
The valve clearance for both inlet and exhaust valves on the engine is 0.35 mm when the engine is cold. p. 67
What is the tightening torque for the wheel nuts on the W50, W60, and W70 models?
The tightening torque for the wheel nuts (A 20-8) is 500 Nm. p. 75
How do I check the brake disks for wear?
The interior disks with friction lining must be replaced if they are worn down to a minimum thickness of 4.5 mm. The wear of the lining must be equal on either side, with a minimum groove depth of 0.2 mm/side. p. 361
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