An hour from now you could have a gauge teed into the micro ports of a 901s, and this Wacker Neuson 901s, 901sp service manual PDF puts the target numbers beside you: 234 pages of factory service data for both compact loader variants under OEM ID 1000188511. Hydraulic schematics come in ISO standard and H controls versions for each machine, every one with a legend, and the wiring section traces each harness by part number: cab, chassis, front lights, even the Austrian road-traffic kit. Pressure-check procedures run from preparatory work through the parking brake release circuit and the 901sp Power Flow option. Set the main system to 345 bar (5004 psi), boost to 26 bar, and pull wheel nuts to 175 Nm. Guess a pressure and you find out the hard way when a fitting lets go at full flow. Print what you need; the searchable original stays clean while the bench copy takes the grease.
What's Inside This Wacker Neuson 901s, 901sp Manual
| System | Pages | Key Topics |
|---|
| Documentation | 2 | Index of Related Bomag Publications (Each Sold Separately) |
| Operation | 11-28 | Notices on This Service Manual, Identification of Warnings and Dangers, Designated Use and Exemption From Liability, Type Labels and Component Numbers, Machine Overview |
| Specifications | 29-40 | Chassis, Travelling Drive, Brakes, Work Hydraulics, Pilot Control, Additional Power Flow Control Circuit |
| Engine | 101-126 | Engine D2011 L04W (Td2011 L04W), Fuel System, Fuel System From Serial No. DC01288, Checking and Adjusting Valve Clearance, Checking and Adjusting the Fuel Injectors |
| Hydraulic System | 127-168 | Rexroth AA20 VG45 Hydraulic Pump (Unit: Exploded View, Distribution), Main Valve Block (Ports, Legend, Diagram) |
| Electrical System | 169-212 | Ohm’s Law; Power, Measuring Equipment, Measuring Methods, Cable Colour Coding, Relays (Use, Mode of Function) |
| Options | 213-234 | Rear Working Lights (Wiring Harness, Connections), Bp – Biohyd Se 46 (Properties), Biodegradable Oil Panolin (Properties), Rearview Mirror Package, Extra Weight |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| All Models |
| Wheel nuts | 175 Nm | p. 34 |
| Nuts for Airboss tyre segments | 13 Nm | p. 34 |
| Max. system operating pressure | 345 bar (5004 psi) | p. 31 |
| Charging/boost pressure | 26 bar (377 psi) | p. 31 |
| Return filter pressure switch control pressure | 5 bar (72.5 psi) | p. 85 |
| Fuel Tank Capacity | 72 l | p. 31 |
| Engine Oil Capacity (max) | 10 l | p. 31 |
| Cylinder-head bolt tightening torque (1st pass) | 41.1 – 46.9 Nm | p. 31 |
| Wheel nut tightening torque | 175 Nm | p. 35 |
| Hydraulic oil tank capacity | 35 l | p. 33 |
| 901s |
| Engine Output (901s) | 50 kW at 2600 rpm | p. 30 |
| 901sp |
| Engine Output (901sp) | 63 kW at 2500 rpm | p. 30 |
