Part of the Hyundai Repair Manuals.
Every one of the 138 pages in this Hyundai HSL850-7 Repair Manual PDF targets one machine: your HSL850-7 skid steer loader, from the self-level valve to the chain drive. Inside: the complete hydraulic circuit diagram with pressure and flow testing for the main control valve, charge pump, and hydrostatic control pump, plus full wiring diagrams with electrical component locations. You also get teardown and rebuild procedures for the main pump, travel motor, and boom and bucket cylinders, backed by a troubleshooting section covering travel hydraulics, power train, and electrical faults. Set the hydrostatic control pump relief valve at 3915 ± 200 psi (270 bar), and torque SAE size 8 flare fittings to 5.1 to 6.3 kgf·m. A dead loader earns nothing sitting in the yard. This bookmarked PDF has a real text layer; type the spec you need, jump straight to it, and get wrenching.
What's Inside This Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-21 | Safety Hints, Specifications, Maintenance |
| Hydraulic Circuit and Component Testing | 22-29 | Hydraulic Circuit Diagram, Main Control Valve System Pressure, Auxiliary Pump Flow, Charge Pump Pressure, Hydrostatic Control Pump Pressure, Hydrostatic Control Pump Flow |
| Self Level Valve | 30-35 | Structure, Hydraulic Circuit, Self Leveling Operation, Bucket Cylinder Extension, Retracting Boom Cylinder, Extending Bucket Cylinder, Retracting Bucket Cylinder |
| Auxiliary Pump | 36-45 | Removal and Install, Disassembly, Assembly, Inspection for Wear |
| Main Pump | 46-64 | Removal and Install, Structure, General Description, Transmission Hydraulic Support System, Controls and Options, Start Up and Maintenance, Troubleshooting |
| Travel Motor | 65-83 | Shaft Seal Replacement, Bypass Valve, Charge Check and High Pressure Relief Valves, Integral Charge Pump, Control Spool, Removal and Install, Structure, Disassembly |
| Main Control Valve | 84-91 | Removal and Install, Structure, Boom Spool, Bucket Spool, Auxiliary Spool, Load Check Valve, Main Relief Valve |
| Boom and Bucket Cylinder | 92-96 | Removal and Install, Structure, Disassembly, Assembly |
| Electrical System | 97-116 | Component Location, Wiring Diagram |
| Power Train | 117-122 | Front Axle Shaft, Rear Axle Shaft, Front Sprocket, Rear Sprocket, Chain Assembly, Taper Roller Bearing |
| Control | 123-129 | Hand Control, Parking Brake, Attachment Holder, Quick Coupler |
| Troubleshooting | 130-138 | Travel Hydraulics, Boom and Bucket Hydraulic, Power Train, Control, Electrical System |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Torque for SAE size 4 flare type fitting | 1.1 - 1.6 kgf·m | p. 18 |
| Torque for SAE size 6 flare type fitting | 2.6 - 3.1 kgf·m | p. 18 |
| Travel motor capacity | 523.6 cc/rev | p. 14 |
| Main pump capacity | 2 x 46 cc/rev | p. 12 |
| Hydrostatic control pump relief valve pressure | 3915 ± 200psi (270 ± 14bar) | p. 28 |
| Charge relief pressure | 300psi (20bar) minimum | p. 27 |
| Auxiliary pump flow | 20gpm (1.26 l/sec) | p. 26 |
| Tightening torque for gear pump to main pump bolts | 3.7~4.2kgf·m | p. 36 |
| Tighten torque for pump mounting bolts (Nut 2) | 19.6±2.9kgf·m (142±21.0lbf·ft) | p. 46 |
| Engine oil quantity | 13.2 L | p. 15 |
| Main relief valve pressure | 175 kgf/cm2 | p. 14 |
| Hydraulic tank capacity | 56 L | p. 15 |


















