Part of the Hyundai Repair Manuals.
Every one of the 386 pages in this Hyundai HL757-7A, HL757XTD-7A, HL757TM-7A service manual PDF covers one machine family: the HL757 wheel loader in all three configurations. Inside: full electrical circuit diagrams with connector specs and pinouts, hydraulic schematics for the power train, brake, steering, and work equipment circuits, plus fault codes and page after page of troubleshooting charts. You also get step-by-step disassembly and assembly procedures for every major system, from the transmission to the loader linkage. Rebuilding a steering cylinder? Torque the gland to 70 ± 7 kgf·m (506 ± 51 lbf·ft), then fill the hydraulic tank to 125 liters before you cycle the system. Your loader isn't earning anything parked. Bookmarked with a real text layer; pull it up on your phone, search the spec, get back to work.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 11-38 | Safety Hints, Specifications, Operational Checkout Record Sheet |
| Engine | 39-46 | Structure and Function, Fuel Warmer System, Engine Speed and Stall RPM |
| Power Train System | 47-120 | Structure and Function, Operational Checks and Troubleshooting, Test and Adjustments, Disassembly and Assembly |
| Brake System | 121-167 | Structure and Function, Operational Checks and Troubleshooting, Tests and Adjustments, Disassembly and Assembly |
| Steering System | 168-228 | Structure and Function, Operational Checks and Troubleshooting, Tests and Adjustments, Disassembly and Assembly |
| Work Equipment | 229-311 | Structure and Function, Operational Checks and Troubleshooting, Tests and Adjustments, Disassembly and Assembly |
| Electrical System | 312-386 | Component Location, Electrical Circuit, Monitoring System, Electrical Component Specification, Connectors, Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Maximum pressure on the EF port | 210 bar | p. 175 |
| Hydraulic oil tank capacity | 125 L (33 U.S. gal) | p. 192 |
| Gland tightening torque | 70 ± 7 kgf·m (506 ± 51 lbf·ft) | p. 216 |
| Nylon nut tightening torque | 75 ± 8 kgf·m (542 ± 58 lbf·ft) | p. 216 |
| Return oil filter bypass valve set pressure | 1.36kg/cm2 (19.3psi) | p. 262 |
| Hydraulic system restriction test - Maximum pressure at steering valve(Ehps) | 2MPa (20bar, 285psi) | p. 284 |
| Hydraulic system restriction test - Maximum pressure at main control valve | 1MPa (10bar, 145psi) | p. 284 |
| Pilot pressure setting | 30~35bar(430~500psi) | p. 289 |
| Relief valve setting pressure | 45bar | p. 289 |
| Hydraulic oil filter replacement interval | 250 operating hours | p. 291 |
| Charging circuit voltage | 20~28V | p. 326 |
| Hydraulic oil temperature warning lamp and audible alarm activation temperature | 105°C (221°F) | p. 337 |
