Part of the Hyundai Repair Manuals.
All 401 pages of this Hyundai HL757TM-7 service manual PDF focus on one machine: the HL757TM-7 Wheel Loader, from the power train out to the boom and bucket. You get complete electrical circuit diagrams with connector pinouts and monitoring system coverage, plus hydraulic schematics tracing the brake, steering, and work equipment circuits. Every system gets the full treatment: operational checks, troubleshooting charts, tests and adjustments, and step-by-step disassembly and assembly. The main pump pushes 51+51 cc/rev at a maximum of 210 kgf/cm2 (2990 psi); torque the pump housing mounting bolts to 12.8 plus or minus 3.0 kgf-m before you button it back up. Your loader is down, and forum threads won't fix it. This PDF is bookmarked with a real text layer; type in a spec, jump straight to the page, and get back to work.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-34 | Safety Hints, Specifications, Operational Checkout Record Sheet |
| Engine | 35-39 | Structure, System Diagrams |
| Power Train System | 40-143 | Structure and Function, Operational Checks and Troubleshooting, Test and Adjustments, Disassembly and Assembly |
| Brake System | 144-183 | Structure and Function, Operational Checks and Troubleshooting, Tests and Adjustments, Disassembly and Assembly |
| Steering System | 184-244 | Structure and Function, Operational Checks and Troubleshooting, Tests and Adjustments, Disassembly and Assembly |
| Work Equipment | 245-325 | Structure and Function, Operational Checks and Troubleshooting, Tests and Adjustments, Disassembly and Assembly |
| Electrical System | 326-401 | Component Location, Electrical Circuit, Monitoring System, Electrical Component Specification, Connectors, Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main pump housing mounting bolt torque | 12.8 ± 3.0 kgf·m | p. 28 |
| Main control valve mounting bolt torque | 12.8 ± 3.0 kgf·m | p. 28 |
| Main pump capacity | 51+51cc/rev | p. 26 |
| Main pump maximum operating pressure | 210kgf/cm² (2990psi) | p. 26 |
| Boom cylinder bore dia × rod dia × stroke | Ø140 × Ø75 × 750mm | p. 27 |
| Bucket cylinder bore dia × rod dia × stroke | Ø120 × Ø65 × 755mm | p. 27 |
| Maximum pressure on the EF port | 210 bar | p. 191 |
| Steering valve relief pressure | 20.1~21.1MPa (205~215bar, 2900~3100psi) | p. 212 |
| Bypass valve set pressure | 1.36kg/cm2 (19.3psi) | p. 277 |
| Maximum pressure at steering valve (EHPS) | 2 MPa (20 bar, 285 psi) | p. 298 |
| Maximum pressure at main control valve | 1 MPa (10 bar, 145 psi) | p. 298 |
| Hydraulic oil filter replacement interval | 250 operating hours | p. 305 |
