Wacker Neuson printed this book itself: document 1000291439, the 307-page factory service manual for the EZ28 track excavator, the same material its own dealer techs work from. As a Wacker Neuson EZ28 service manual PDF it holds the hydraulic schematics that trace pilot oil from the double variable displacement pump through the main valve block, and wiring diagrams that let you chase a fault across relays, fuses, and harnesses. Both Yanmar engines fitted over the production run, the 3TNV76-NNS and the later 3TNV80F-SNNS, get separate service chapters. Set valve clearance to 0.15 to 0.25 mm cold, then pull your live ring bolts down to 110 Nm straight from the technical data section. One half-remembered torque figure can crack a cylinder head. Bookmarks and a genuine text layer put the page you need on screen in seconds.
What's Inside This Manual
| System | Pages | Key Topics |
|---|
| Operation | 12-41 | Information on This Service Manual, Identification of Warnings and Dangers, Explanation of Symbols and Abbreviations, Conversion Table, Designated Use and Exemption From Liability |
| Engine | 130-169 | Overview of Engine 3TNV76-Nns, Fuel System, Cooling System, Checking and Adjusting Valve Clearance |
| Hydraulic System | 170-205 | Hydraulic Pump (Double Variable Displacement Und Twin Gear Pump Pvd-0B-23BP-8G3-5083A, Pump Unit: Exploded View, Pilot Oil Supply Unit, Double Variable Displacement Und Twin Gear Pump Pvd-0B-23BCP-8G3-5498Z, Dismantling the Hydraulic Pump, Assembling the Hydraulic Pump, Malfunctions of the Hydraulic Pump) |
| Electrical System | 206-307 | Relays, Fuses and Relays, Wiring Harnesses |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Cylinder-head bolt | 59 – 63 Nm | p. 49 |
| Connecting rod bearing screw | 22.6 – 27.5 Nm | p. 49 |
| Metric hose fittings (light execution) 05 6L | 15 Nm | p. 50 |
| Metric hose fittings (light execution) 08 10L | 40 Nm | p. 50 |
| Valve clearance (intake = outlet) | 0.15 – 0.25 mm | p. 42 |
| Compression (Yanmar 3TNV76-NNS) | 23.5 +/- 1 bar | p. 42 |
| Track tension play | 20 – 25 mm (0.8 – 1 in) | p. 115 |
| Engine Oil Capacity | 3.4L | p. 61 |
| Hydraulic Oil Reservoir Capacity | 30L | p. 45 |
| Hydraulic System Total Fill | 42L | p. 45 |
| Fuel Tank Capacity | 36L | p. 43 |
| Cylinder-head bolt tightening torque (1st pass) | 29.5 – 31.5 Nm | p. 135 |
