Bosch Rexroth A4VG and AA2FM Hydraulic Motor Service Manual

A hydraulic motor turns fluid pressure into rotation, and on a crane it's what drives winches, slewing and travel functions. When one starts leaking, losing speed or running rough, the machine sits. The service manual is what a technician picks up when the unit is coming out and the shop is repairing it in-house. It's also the first thing you want when a used machine arrives with no paperwork.

What this manual helps you do

• Follow the removal and installation steps for the motor without guessing at the sequence
• Rebuild the unit using the disassembly and assembly procedures
• Check wear and condition of internal parts during inspection and adjustment
• Adjust the motor to the settings the procedures call for
• Troubleshoot a slow, noisy or weak motor by working from description and function to the likely fault

Who this is for

A rental fleet mechanic or crane service technician who repairs hydraulic components in the yard instead of sending them out. It also suits independent repair shops and plant maintenance staff who need a written procedure on the bench. Since it's used on Liebherr machines, it fits fleets running that equipment.

FAQ

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

A: One PDF file, 134 pages, in English and German. The text can be searched and copied, so you can jump straight to a procedure or copy a step into a work order.

Q: Which models does it fit?

A: It covers the A4VG, AA2FM and A2FM. The title on the manual is Axial Piston Motors and Pumps Repair Manual.

Q: How does it fit the job I'm doing?

A: It's a workshop repair manual, so it's built for the bench and the machine: taking the motor off, opening it up, inspecting it, putting it back together and getting it running again.

Download it, keep it with the fleet records, and have the procedure open the next time a motor comes into the shop.

Click here to view the preview (PDF)

Models covered by this manual

This service manual is also used for one further Hydraulic Motor model: A2FM. Check the model and serial number on your data plate before ordering.

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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