Description

Bosch Rexroth A10VSO 2011 Technical Manual

I’ve been turning wrenches for 28 years, and I’ve seen what happens when a guy guesses on hydraulic pump specs. You get a pump that screams, a seal that blows, or a machine that drops a load. This Bosch Rexroth A10VSO 2011 Technical Manual is the real deal—OEM factory documentation, not some third-party interpretation. If you’re working on an axial piston variable pump from the A10VSO series, you don’t need a summary. You need the actual data: torque values, control port dimensions, fluid viscosity limits. This 44-page manual gives you that. No filler.

What This A10VSO Manual Covers

This manual is specific to the Series 32 A10VSO pumps in sizes 45 through 180. It opens with the type code breakdown so you can decode your pump’s exact configuration. Then it dives into technical data tables: theoretical flow, displacement, and pressure ratings. The section on permissible radial and axial forces on the drive shaft is critical—ignore that and you’ll snap a shaft. There’s a full page on drive power and flow calculations, which matters when you’re matching the pump to an engine or motor. Control options are covered in detail: DG two-point control, DR pressure control, DRG remote pressure control, DRF/DRS pressure and flow control, LA power control, and the electro-hydraulic ED and ER variants. Each control section includes schematics and adjustment procedures.

Why You Need Factory Torque Specs for Hydraulic Pumps

Aftermarket manuals love to say “tighten securely.” That’s how you get a cracked flange or a loose adaptor. The Bosch Rexroth manual gives you actual torque values for the mounting bolts, port fittings, and control valve fasteners. For the A10VSO, you’ll find the permissible input and through drive torques listed in the technical data section. Those numbers come from the engineers who designed the pump, not a writer guessing from a photo. Use the wrong torque and you either strip threads in an aluminum housing or leave a joint loose enough to weep oil. If you’re rebuilding or installing one of these pumps, that data on page 8 (the torque table) saves you a call to the parts line.

Control Options: DG, DR, and Electro-Hydraulic

The manual dedicates a full page to each control variant. DG is a direct-operated two-point control—good for simple on/off applications. DR is pressure control, the most common for open-circuit systems. If you need remote pressure setting, the DRG section shows the hydraulic remote line connection. For systems that need both pressure and flow control, the DRF and DRS pages include the X-T port diagrams. The LA… series of power controls (LA5D through LA9D) let you match pump output to engine power limits. And the electro-hydraulic controls (ED with negative or positive characteristic, ER with 12V or 24V solenoids) include wiring information and solenoid connector details. Each control section lists the adjustment range and the factory test pressures.

Dimensions and Ports: Verify Before You Install

You can’t swap a pump without checking the mounting dimensions. The manual provides detailed drawings for sizes 45, 71, 100, 140, and 180, including the DR pressure control variant, drive shaft dimensions, and port locations. The ports are labeled with thread size and depth—SAE and metric options are shown. There’s also a section on through-drive dimensions if you’re stacking pumps. The summary mounting options table lists the combinations allowed for A10VSO + A10VSO tandem setups. Check the dimensions against your existing bracket before ordering a pump—saves you a return shipping charge.

44 Pages of Real Specs

44 pages doesn’t sound like a lot, but each page is packed with tables, graphs, and diagrams. The installation notes at the end cover everything from oil filtration requirements to shaft seal pressure limits. General information includes storage recommendations and fluid compatibility. If you’re doing a pump swap or a full hydraulic system rebuild, this manual is your single source for correct data. Pair it with the Bosch Rexroth A4VSO 1997 Technical Manual – Factory Specs if you’re working on the larger frame sizes, or the Bosch Rexroth A10VO Axial Piston Variable Pump Data Sheet for a quick reference card. For gear pump applications, see the Bosch Rexroth External Gear Pumps Series F. And if you’re dealing with a manual transmission in an industrial application, the Manual Transmission documentation at our partner site covers the basics.

Does this manual cover the A10VSO series 31?

No. This is specifically for Series 32. Series 31 pumps have different control options and shaft dimensions.

What fluids are recommended?

The manual lists recommended hydraulic fluids on the technical data page. It includes mineral oils, HFC fluids, and HFD fluids with specific viscosity ranges. Do not use fluids outside the listed limits—the pump will cavitate or wear prematurely. The manual also gives the permissible fluid temperature range and the required filtration level (ISO code). These specs matter because using the wrong fluid voids the pump warranty and can cause internal damage within hours.

Can I use this manual for the A10VS O series?

Yes, the A10VS O is the open-circuit pump designation covered here. The type code is A10VS O…

Are the torque values in imperial units?

The manual uses metric (Nm). You can convert: 1 Nm = 0.7376 lb-ft. Use a converter tool.

You’ve got a Bosch Rexroth A10VSO pump on your bench or in a machine. You need the factory specs to get it right. This 2011 technical manual gives you the torque values, control adjustment procedures, and dimensional data that aftermarket docs skip. Access the Factory Manual now and keep it on your laptop or tablet—you’ll refer to it every time you touch that pump. No more guessing, no more leaks, no more broken shafts.