The Wacker Neuson EZ26, E10-03 service manual PDF takes this tracked excavator apart on paper: 295 pages of factory service data filed under OEM ID 1000407261, undercarriage to swivel joint. Both engine variants get full chapters, the 3TNV76-NNS up to 2012 and the 3TNV80F-SNNS after it, with valve clearance checks, injection pump removal and cylinder head tightening order for each. A dedicated hydraulics chapter works through the pump, main valve block, drive counterbalancing system and swivel unit, while the wiring section maps every harness in your machine, cab headlights to proportional controls, legends included. Set track tension play at the idler to 20 to 25 mm, and pull the 10L DKOL hose fittings to 40 Nm before you close anything up. Guess a spec wrong and you buy the second teardown. Print what you need, let those pages take the grease, and keep the bookmarked, text-searchable master clean.
What's Inside This Wacker Neuson EZ26, E10-03 Manual
| System | Pages | Key Topics |
|---|---|---|
| Operation | 7-30 | Notices on This Service Manual, Identification of Warnings and Dangers |
| Technical Data | 31-52 | - |
| Maintenance | 53-137 | Information on Maintenance, Maintenance Plan |
| Engine | 138-185 | Overview of Engine, Checking and Adjusting Valve Clearance |
| Hydraulic System | 186-223 | Hydraulic Pump, Main Valve Block |
| Electrical System | 224-243 | Measuring Equipment and Methods, Engine/Chassis Wiring Harness |
| Diagrams | 244-251 | Hydraulics Diagram Legend |
| Options | 252-275 | Safe Load Indicator, Hydraulic Quickhitch Valve |
| PowerTilt PTS06 | 276-295 | General Instructions |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Hose identification code example | SLHYDR2SC16PN180PD180L1950D0 | p. 33 |
| Metric hose fittings for hydraulic applications (light execution, Dkol) - 05 6L | 15 Nm (11 ft.lbs.) | p. 42 |
| Track tension play | 20 – 25 mm (0.8 – 1 in) | p. 118 |
| Tightening torque for gear pump fastening screws | 19.6 – 23.5 Nm (14.5 – 17.3 ft.lbs.) | p. 198 |
| Tightening torque for pilot oil supply unit fastening screws | 20.6 – 25.5 Nm (15.2 – 18.8 ft.lbs.) | p. 198 |
| Engine Oil Capacity | 3.4L | p. 55 |
| Hydraulic Oil Reservoir Capacity | 30L | p. 34 |
| Hydraulic Oil System Fill | 42L | p. 34 |
| Engine Idling Speed | 1300 +/- 25 rpm | p. 31 |
| EZ28 | ||
| Joint rod (lifting eye) nominal size A | 30 mm (1 1/8 in) | p. 120 |
| Joint rod (lifting eye) max. tolerance B | 31.5 mm (1 1/4 in) | p. 120 |
| EZ26 | ||
| Max Engine Speed (3TNV76-NNS) | 2675 +/- 25 rpm | p. 31 |
Wacker Neuson EZ26, E10-03 Common Problems This Manual Covers
Wacker Neuson EZ26 bucket cylinder sags during short pauses or drops after transport with no load
Verify the leak path first: block the bucket cylinder mechanically and watch it through a pause. If the sag stops, the cylinder seals are sound and the LUDV main valve block is leaking internally. Test the bucket circuit pressure limiting valve against its 250 bar (3626 psi) setting on page 205 before pulling the spool.
Manual Section: Hydraulic System p. 205Bucket cylinder hesitates or stops briefly mid-stroke, then resumes with stick-slip movement
Check the hydraulic oil level before touching the valve; the reservoir holds 30 L (page 34), and a low level lets the pump pull air, which mimics a sticking spool. Bleed the circuit, then run the pump malfunction checks for insufficient flow starting on page 198. If flow tests good, inspect the bucket spool for scoring.
Manual Section: Hydraulic Pump Malfunctions p. 198Boom or bucket cylinder drifts down during the hose burst valve load holding check
Test load holding with the boom raised over a cleared area; any drift means the hose burst valve is not sealing. Inspect the valve using the Options section starting on page 252, replace any hydraulic hose older than 6 years per the interval on page 112, and torque new fittings to the chart values on page 42.
Manual Section: Options p. 252Engine cranks slowly in cold weather, will not start, or runs rough after starting
Check battery voltage and starter cable connections using the electrical system procedures starting on page 224. Verify the engine oil grade matches the ambient temperature; the sump holds 3.4 L (page 55). Once it fires, confirm idle speed at 1300 +/- 25 rpm from the specifications on page 31 and recheck for rough running.
Manual Section: Engine MalfunctionsPowerTilt swivel drifts under load and bucket shows lateral play at the coupler
Measure circumferential play at the PowerTilt housing; anything beyond 2.0 mm (0.08 in), the limit on page 289, means worn internal components. Check axial play against the 0.5 mm limit on the same page. Retorque the end cap to 475 to 680 Nm per page 290 before condemning the unit.
Manual Section: PowerTilt PTS06 p. 289Frequently Asked Questions
How do I reset the maintenance meter on the Wacker Neuson EZ26?
To reset the maintenance meter, select it using switch A, then press switch B. Enter the factory-set code '12345' using switch A to select digits and switch B to confirm each. Once the code is entered correctly, the meter resets to the preset value of 500 operating hours. p. 136
What is the tightening torque for the cylinder head bolts on the EZ26 engine?
The cylinder head bolts for the engine must be tightened in two stages. The first position requires 29.5 – 31.5 Nm (21.5 – 23 ft.lbs.), and the second speed requires 59 – 63 Nm (43.5 – 46.5 ft.lbs.). p. 144
What is the specified valve clearance for the EZ26 engine?
The valve clearance for both intake and exhaust valves on a cold engine should be set between 0.15 and 0.25 mm (0.006 – 0.01 in). p. 142
What is the hydraulic oil reservoir capacity for the EZ26?
The hydraulic oil reservoir capacity is 30 liters (8 gallons), while the total system fill quantity is 42 liters (11 gallons). p. 34
How often should the V-belt be replaced on the EZ26?
The V-belt should be replaced every 500 operating hours as part of the service interval. p. 64
Is this Wacker Neuson EZ26 Service Manual a digital download?
This is a 295-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
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