Link-Belt's LS-2800CII hydraulic excavator is the one machine covered by OEM document WEL2802-1E, a 410-page Link-Belt LS-2800CII shop manual PDF; if that model sits in your shop, this is its book. Hydraulic schematics trace oil from the main pump through the control valve out to the swing motor, travel motors, and boom, arm, and bucket cylinders, while wiring diagrams map the monitor display, controller, and throttle motor circuits. Travel motor and reduction gear work alone fills roughly a third of the volume, backed by full disassembly and reassembly sequences for the pump, pilot valve, rotating joint, and cylinders. Pressure-test cylinder oil seals against the 2 kgf/cm² (28.4 psi) standard, then pull the P1 and P2 pump ports to 9.0 to 11.0 kgf-m. Guess at those numbers and you fund the second teardown yourself. Bookmarked and text-searchable, the file travels wherever the machine does.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Caution for Inspection and Maintenance, Basic Rules | 5-12 | Prevention of Fire, General Rules for Disassembling, General Rules for Reassembling |
| Hydraulic and Electric Circuits, Performance Standards | 13-24 | Main Pump, Swing Motor, Traction Motor, Control Valve, Monitor Display, Controller, Adjustment and Performance Test |
| Traction Motor, Reduction Gear and Drive Assembly | 25-152 | Travel Motor, Traction Drive Installation, Bolt Tightening Torque, Oil Stopper for Suction Strainer |
| Take-Up Roller and Track Roller | 153-190 | Structural Diagrams, Tools and Jigs, Disassembly and Reassembly Procedures, Maintenance Standards |
| Grease Cylinder, Recoil Spring and Roller | 191-206 | Structural Diagram, Disassembly Procedure, Reassembly Procedure, Maintenance Standards |
| Shoe and Drive Sprocket | 207-212 | Structural Diagram, Disassembly and Reassembly, Maintenance Standards |
| Swing Motor and Reduction Gear | 213-248 | Specifications, Function and Structure, Causes of Trouble and Remedies, Motor Structure, Disassembly |
| Engine Mounting | 249-250 | Bolt, Cushion Rubber |
| Hydraulic Pump and Pump Installation | 251-310 | Specifications, Details of Parts, Tools and Jigs, Disassembly, Coupling, Pump Input Shaft, Engine Flywheel |
| Rotating Joint | 311-316 | Structural Diagram, Tools and Reassembly Procedure |
| Pilot Valve | 317-340 | Summary and Specifications, Construction and Functions, Maintenance |
| Control Valve | 341-364 | Outline, Disposition, Notes for Handling, Disassembling and Reassembling |
| Hydraulic Cylinder | 365-384 | Disassembly and Assembly Procedures, Trouble, Maintenance Standards |
| Service Monitoring System | 385-400 | Outline and Performance, Disassembly and Reassembly |
| Weights, Maintenance Standards and Conversion Tables | 401-410 | Lower Mechanism, Upper Machinery, Counter Weight, Turntable Bearing, Back-Hoe Attachment Standards, Conversion Table |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Travel bend (2) - difference in time required for 5 idle turns of the sprocket | 5% | p. 19 |
| Air bleeding plug tightening torque | 0.7 to 0.9 kgf-m | p. 34 |
| P1 and P2 ports tightening torque | 9.0 to 11.0 kgf-m | p. 34 |
| Pressure resistance of oil seal (Ordinary) | 2 kgf/cm² (28.4 psi) | p. 65 |
| Pressure resistance of oil seal (Maximum) | 5 kgf/cm² (71.1 psi) | p. 65 |
| Air pressure for track roller assembly leak check | 2 kgf/cm² (14 ft.lb) | p. 187 |
| Oil fill amount for LS-2650CII track roller | 160 cc (5.28 oz) | p. 187 |
| LS-2800CII Spring Mounting Length | 557 mm (21.93 inches) | p. 203 |
| Bending radius for buffer ring | 6mm (0.24 in) | p. 376 |
| Travel Motor Lubricant Initial Replacement Interval | 100 to 250 hours | p. 31 |
| Travel Motor Lubricant Second and Subsequent Replacement Interval | 1000 to 1500 hours | p. 31 |
| Swing Motor Lubricant Replacement Interval | 1000 to 1500 hours | p. 115 |
