Travel drive, work hydraulics, axles, braking, steering, and the full electrical system: the Wacker Neuson WL34 service manual PDF (OEM 1000373602) walks each one end to end across 348 pages of factory repair data for this wheel loader. Hydraulic circuit diagrams cover the HDM19/3 and HDM19/4 valve configurations, hose routing pages split machines above and below serial number 3025887, and electrical schematics trace the CAN bus, power supply, and both the Perkins and Deutz engine harnesses. A troubleshooting section works through drive faults from no forward travel to weak traction force. Set the pressure cutoff on the A4VG variable displacement pump to 440 bar, and gap Perkins valves at 0.2 mm before you chase a hard-start complaint. Two engine makes, three hydraulic variants, one loader. Bookmarks in the text-searchable file drop you on the right circuit diagram in seconds.
What's Inside This Manual
| System | Pages | Key Topics |
|---|
| Introduction | 3-48 | Notice on This Service Manual (Use of the Service Manual, Explanation of Symbols and Abbreviations, Repair Instructions) |
| Operation | 49-56 | Overview of Control Elements, Indicating Instruments, Loader Unit Control Lever, Overview of Rotary Switches, Overview of Switch Panels, Indicator Lights and Warning Lights |
| Engine | 135-158 | Perkins Engine 404D-22 (Overview, Adjust Idle Speed, Starter, Alternator), Perkins Engine 404F-22 (Overview), Deutz Engine TD2011 L04w (Overview, Lube Oil System), Fuel Tank |
| Cooling | 159-162 | Radiator, Fan Blades |
| Travel Drive | 163-190 | Traveling Drive Hose Routing, M-Drive Hose Routing |
| Axles | 191-200 | Front Axle (Overview), Rear Axle (Overview), Type Label – Front/Rear Axle |
| Braking System | 201-214 | Overview, Service/Parking Brake (Overview, Drum Brake Setup, Change Brake Jaws/Wire Rope Adapter, Exchange the Spring-Loaded Cylinder, Bowden Cable for the Fixed Brakes) |
| Steering System | 215-226 | Hose Routing, Steering Wheel, Steering Column, Steering Column Gas Strut, Remove/Install Steering Cylinder, Steering Orbitrol S1 (Overview), Checking the Steering Hydraulics |
| Work Hydraulics | 227-260 | Overview, Vehicles with a Serial Number < 3025887 |
| Electrical System | 261-348 | Fuses, Fuse Assignment, Machine Control Unit (Disassemble, Install), Joystick (Overview), Battery Master Switch |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Valve clearance Perkins Series 400 | 0.2 mm | p. 68 |
| Valve clearance Deutz Series 2011 inlet | 0.3 mm | p. 68 |
| Pressure cutoff specified value | 440 bar | p. 167 |
| Starting speed specified value | 1200 to 1250 rpm | p. 168 |
| Weight of variable displacement pump A4VG40DA | 31 kg | p. 172 |
| Weight of variable displacement motor A6VM80 | 40 kg | p. 176 |
| Operating pressure for vehicles with control valve HDM 19/3 | 215 bar | p. 251 |
| Operating pressure for vehicles with control valve HDM 19/4 | 240 bar | p. 251 |
| Perkins 404D-22 Engine Output | 35.7 kW | p. 15 |
| Deutz TD 2011 Engine Output | 55.1 kW | p. 15 |
| Wheel Nut Tightening Torque (M14 x 1.5) | 150 Nm | p. 23 |
| Wheel Nut Tightening Torque (M18 x 1.5) | 285 Nm | p. 23 |
