The charge pump on a closed-circuit, hydrostatic transmission has a number of important functions. These include:
1. Replenish fluid lost from the transmission circuit due to volumetric inefficiency of the pump and motor.
2. Replace fluid purged from the circuit via the hot-oil flushing valve (where fitted).
3. Supply make-up fluid to compensate for load-induced oil compression and conductor (pipe/hose) … Read more
One of our members sent me this story from the coal face:
“I have a question about some trouble a hydraulic machine has been giving me at work. The pump set is designed with vane pumps located on top of the reservoir with suction strainers. The trouble is that at odd times a pump (any one of the three) will … Read more
When designing and constructing a hydraulic tank there are a lot of things to consider. One of them is to ensure an air-sucking vortex, like that you see when water goes down a drain, can not develop at the pump intake line penetration. Doing the following will ensure that it doesn’t:
–Locate the intake penetration at least five times its … Read more