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Part of the Hyundai Repair Manuals.
Need factory data for your Hyundai HSL850-7A skid steer loader? This 180-page Hyundai HSL850-7A service manual PDF walks you through the HST pump (mechanical and pilot types), travel motor, self level valve, and boom and bucket cylinders from teardown to reassembly. You get hydraulic circuit diagrams with component pressure and flow testing steps, full wiring diagrams with electrical component locations, exploded views of the auxiliary pump internals, and a troubleshooting section covering travel hydraulics, power train, and controls. Torque the auxiliary pump bolts to 3.7-4.2 kgf.m (26.8-30.4 lbf.ft) and pull the front cover bolts down to 14.3 kgf.m (103 lbf.ft). No more diagnosing a weak drive side on guesswork. Bookmarked with a live text layer: jump straight to a section, search any spec by keyword, and pull it up on your phone next to the machine.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-21 | Safety Hints, Specifications, Maintenance |
| Hydraulic Circuit and Component Testing | 22-35 | Hydraulic Circuit Diagrams, Mechanical Type Testing, Pilot Type Testing, Component Pressure Testing, Flow Displacement Testing |
| Self Level Valve and Auxiliary Pump | 36-57 | Self Level Valve Structure, Self Leveling Operation, Auxiliary Pump Removal and Installation, Tandem Auxiliary Pump, Pump Disassembly and Assembly |
| HST Pump (Mechanical and Pilot Types) | 58-84 | HST Pump Removal and Installation, HST Pump Structure, General Description, Transmission Hydraulic Support System, Troubleshooting, Inspection and Adjustments |
| Travel Motor | 85-129 | Travel Motor Removal and Installation, Travel Motor Structure, Disassembly and Assembly, Brake Motor Disassembly, Brake Motor Assembly |
| Boom and Bucket Cylinder | 130-134 | Boom Cylinder Removal and Installation, Bucket Cylinder Removal and Installation, Cylinder Structure, Cylinder Disassembly, Cylinder Assembly |
| Electrical System | 135-157 | Component Location, Wiring Diagram |
| Power Train | 158-163 | Power Train Component, Front and Rear Axle |
| Control | 164-171 | Mechanical Control, Pilot Control, Attachment Holder |
| Troubleshooting | 172-180 | Travel Hydraulics, Boom and Bucket Hydraulic, Power Train, Control, Electrical System |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Flare type fitting torque (SAE size 4) | 1.1 - 1.6 kgf·m (8.3 - 11.7 lbf·ft) | p. 17 |
| Flare type fitting torque (SAE size 6) | 2.6 - 3.1 kgf·m (18.8 - 22.9 lbf·ft) | p. 17 |
| Battery specification | 1 x 12V x 100~120Ah | p. 13 |
| Tightening torque for auxiliary pump bolts | 3.7~4.2 kgf·m (26.8~30.4 lbf·ft) | p. 42 |
| Tightening torque for front cover bolts | 14.3 kgf·m (103 lbf·ft) | p. 56 |
| Battery | MF90EH(300x172x203), CCA : 720A, 5HR : 72AH | p. 154 |
| Thermostat switch | On : 110°C, Off : Under 105°C | p. 154 |
| Engine Rated Gross Horsepower | 75.3 ps | p. 13 |
| Engine Oil Quantity | 11.2 L | p. 15 |
| Main Relief Valve Pressure | 175 kgf/cm2 | p. 14 |
| Auxiliary Pump Tightening Torque | 3.7-4.2 kgf·m | p. 42 |
