Axial piston units - general information F1A constant flow pumps and motors Double adjustable pumps type F4 Pumping aggregate type F5 Frontal adjustment variable motors type F6A Axial piston pumps type PM     Download Acrobat Reader Free.     Observation: All files are in PDF format. For downloading you need Adobe Acrobat Reader. If you do not have installed Adobe Acrobat Reader for pdf files, you can download it from our site.