Across 80 pages, the Hyster F1.8UT service manual PDF (OEM ID 4322476) settles how the UT series forklift truck is adjusted, tested and rebuilt, covering seven variants from the F1.8UT to the F80UT. Hydraulic schematics trace the main oil circuit from the main pump through the control valve, main relief valve and bypass steering overflow valve to the lift and tilt cylinders. Wiring diagrams sit with electrical troubleshooting for the OPS and park brake alarm system, and the brake chapter ends with a test of the automatic clearance regulator. Confirm main oil pressure reads 1.1 to 1.4 MPa, and torque wheel mounting nuts to 470-550 N·m. Your truck will not start? That fault has its own diagnostic entry, as do dead lift, lowering and tilt functions. Bookmarks and a live text layer take you straight to designations such as the DCCT5 control valve or YDS40-XH.905 differential, so you order against the correct unit the first time.
What's Inside This Manual
| System | Pages | Key Topics |
|---|
| Forklift Truck Main Parts | 5 | Torque Converter, Speed Reducer, Speed Differential, Steering System |
| Forklift Main Technical Parameters | 6-8 | Main Technical Parameters |
| Power System | 9-14 | Engine System (Engine Overview, Inspection, Engine Adjustment) |
| Transmission | 15-25 | Overview |
| Drive Axle | 26-27 | Overview, Maintenance of Drive Axle |
| Steering System | 28-34 | Overview (Fully Hydraulic Steering Gear Assembly, Steering Cylinder, Examination After Reassembly of Steering System) |
| Brake System | 35-46 | Overview (Brake Master Cylinder, Wheel Brake, Automatic Clearance Regulator) |
| Hydraulic System | 47-65 | Main Pump (Control Valve and Bypass Valve, Operation of Spool Valve, Neutral Position) |
| Lifting System | 66-69 | Safety Procedures When Working Near Mast (Inside and Outside Masts, Bracket, Adjust) |
| Electrical System | 70-75 | Overview (Electrical Box, Battery, Electrical Schematics) |
| Drive, Operation, and Routine Maintenance of Forklift Truck | 76-80 | Transporting the Forklift Truck, Towing, Long-Term Storage of Forklift Truck, Maintenance Procedures Prior to Operation, Cooling System |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Torque Converter Inlet Pressure | 0.5~0.7 Mpa | p. 15 |
| Main Oil Pressure | 1.1~1.4 Mpa | p. 15 |
| Half shaft mounting nut torque | 96-111 N·m (70.80-81.86 lbf ft) | p. 27 |
| Wheel mounting nut torque | 470-550 N·m (346.65-405.65 lbf ft) | p. 27 |
| Wheel hub slot nut torque | 2.9-7.8 N·m | p. 34 |
| Wheel cylinder piston to cylinder body clearance | 0.065-0.150 mm | p. 41 |
| Rubber cup diameter | 30.1-0.2 mm | p. 41 |
| Fuel Tank Capacity | 108 liter | p. 12 |
| Brake Drum Mounting Nut Torque | 206-225 N·m | p. 27 |
| Master Cylinder Diameter | 19.05 mm | p. 35 |
| Wheel Cylinder Diameter | 28.58 mm | p. 35 |
| Brake Shoe Thickness (Minimum) | 5 mm | p. 42 |
