Bosch Rexroth A4VG 71-180 Hydraulic Pump Service Manual

The A4VG 71-180 is a variable displacement axial piston pump. On cranes and other heavy machines it drives the hydrostatic circuit, and Liebherr uses it on their machines. When one wears out or loses output, the person with the wrench needs the repair procedure in front of them. That's what this service manual is for.

What this manual helps you do

• Follow the removal and installation steps when you pull the pump off the machine
• Rebuild the pump using the disassembly and assembly procedures
• Check worn parts during inspection and adjustment before you put it back together
• Adjust the control settings after a rebuild
• Troubleshoot a weak or noisy pump with the description and function section as your reference

Who this is for

Independent repair shops, rental fleet mechanics and crane service technicians who rebuild pumps in-house. It also suits plant maintenance staff working on a machine that came in with no paperwork. If the pump on your bench says A4VG 71-180, this is your book.

FAQ

Q: What do I receive and how is it organised?

A: You get 1 PDF file, 50 pages in total. It's the complete manual, titled "A4VG 71-180 Repair Instructions", publication number RDE 92003-02-R. The text is in German (multilingual). The cover may show the older Mannesmann name, which is the same product line before Bosch Rexroth.

Q: Which pump does it fit?

A: It covers the Bosch Rexroth A4VG 71-180 hydraulic pump, the type used on Liebherr machines. Check the nameplate on your pump against that model designation.

Q: How does it fit my job?

A: It's a workshop repair document. You'd use it for removal, disassembly, inspection, adjustment and reassembly, the same steps you follow on any pump rebuild.

Download it, print the pages you need and keep them at the bench while you work.

Click here to view the preview (PDF)

Table of Contents:

General outline of the sections covered in a service manual of this type. Actual chapter numbering and section names vary by model and edition.

• Foreword and safety information
• General information and specifications
• Description and function
• Removal and installation
• Disassembly and assembly
• Inspection and adjustment
• Troubleshooting
• Service data

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