A travel motor rebuild on a 2800 stalls fast without the factory numbers, and this 716-page Link-Belt 2800, 3400 shop manual PDF (OEM ID 817) is where those numbers live for both hydraulic excavators. Hydraulic schematics trace the pump, regulator, and control valve circuits, and the control valve section alone takes up roughly the last third of the book. Disassembly procedures run from the undercarriage rollers and recoil spring up through the swing motor and rotating joint, each closing with maintenance standards you can measure worn parts against. Keep casing inner pressure under 28.4 psi (2.0 kgf/cm²) during travel motor work, and pull the upper roller installation bolts to 384-445 ft lbs (521-608 N·m). One missing spec can park a whole crew for a day. This bookmarked, text-searchable PDF puts that number in front of you and the 2800 or 3400 back on the meter.
What's Inside This Manual
| System | Pages | Key Topics |
|---|
| Shop Manual Explanation | 3-46 | Contents, Safety, Introduction, Symbols Used, Precautions, Standard Torque Specifications, Numerical Value Conversion Table |
| General | 47-84 | Lower Mechanism, Engine, Excavator Attachment |
| Performance | 85-102 | Main Body Weight, New Machine Performance Check List, Suspension Performance |
| Main Body Disassembly and Servicing Procedures | 103-182 | Lower Mechanism, Upper Mechanism, Attachment, Maintenance Standards |
| Major Components Disassembly and Servicing Procedures | 183-234 | Tightening Torque for Major Parts, Take-Up Roller, Upper Roller, Lower Roller, Recoil Spring, Rotating Joint |
| Hydraulic Pump Handling | 235-258 | Pump Handling, Pump Maintenance, Regulator Handling, Regulator Maintenance |
| Hydraulic Pump Maintenance | 259-280 | Pump Main Body Disassembly, Pump Main Body Maintenance Standards, Structure Diagram, Development Elevation |
| Regulator Handling | 281-306 | Regulator Specifications, Fluid Control, Horsepower Control, Qmax Cut Control, Regulator Adjustment |
| Regulator Maintenance | 307-326 | Regulator Disassembly, Regulator Inspection, Regulator Reassembly, Structure Diagram |
| Travel Mechanism | 327-450 | Travel Motor Assembly, Travel Motor Maintenance, Reduction Gear Disassembly, Reduction Gear Assembly |
| Swing Mechanism | 451-524 | Swing Motor Assembly, Swing Mechanism Maintenance, Relief Valve Disassembly, Swing Brake Function |
| Control Valve | 525-716 | Control Valve Operations, Relief Valve Maintenance, Stack Valve Structure, Solenoid Valve Maintenance |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| All Models |
| Fuel tank mounting bolts torque | 252-289 N·m | p. 63 |
| Travel equipment installation bolts | 197-230 ft lbs (267-312 N·m) | p. 109 |
| Allowable casing inner pressure | 28.4 psi (2.0 kgf/cm²) | p. 244 |
| Operating temperature range | -4°F to 176°F (-20°C to 80°C) | p. 245 |
| Pin (15) protrusion beyond flange (10) | 1.055" - 1.094" (26.8mm - 27.8mm) | p. 433 |
| Hydraulic oil temperature | Below 176°F (80 °C) | p. 609 |
| Buffer ring bending radius | 6 mm | p. 621 |
| Hydraulic oil cooler capacity | 300 cm3 | p. 716 |
| 2800 |
| 2800 Lower Total Weight | 17,260 lbs | p. 47 |
| 2800 Engine Rated Horsepower | 128 PS | p. 59 |
| 3400 |
| 3400 Lower Total Weight | 20,240 lbs | p. 47 |
| 3400 Engine Rated Horsepower | 153 PS | p. 60 |
