Hydrostatic Transmission Case Drain Flow and Efficiency – Part III

Rexroth A2VSL1000 hydraulic pumpIn my previous articles on hydrostatic transmissions, I described the technique for determining the condition of a hydrostatic transmission using case drain flow, and discussed the role and influence of a flushing valve when doing this.

In response to these articles, some members were still confused about the influence of the charge pump when determining case drain leakage from … Read more

Hydraulic Troubleshooting Step #1

hydraulic schematic drawingIn The Hydraulic Troubleshooting Handbook, I explain 12 principles which must be adhered to in order to solve any hydraulic problem effectively. Troubleshooting Principle #1 is: check and eliminate the easy things first. The benefits of this mandatory first step are clearly illustrated by a troubleshooting situation I was involved in recently.

The machine in question had a complex … Read more