I was using float mode on my skid steer the other day. Soon after that, my charge pump ate itself. Just crossed my mind, in float mode...are you essentially dead heading the charge pump? If so, I know there is a relief valve somewhere in the line. Could the relief valve be stuck? Where is the relief valve located? Thanks for the help...
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There will be a relief, that won't have caused the pump to break.
skidsteer.ca
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As far as the pump is concerned float mode is the same as not touching the foot pedals. Either way its just pumping oil in a loop back to the tank at minimal pressure. That did not kill your pump, not sure what did or if it died of old age. The relief comes in to play when you go to move the loader cylinders and they can because they are over loaded. This is when the pump works the hardest, and even that should not kill it if the relief is adjusted to the proper or lower pressure.
Right now I'd be looking for a new pump and inspecting the system for contamination from the failed pump.
Ken
Earthwerks Unlimited
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It's not uncommon for a charge pump to go.
The charge pump ONLY is used for the hydrostatic drive pumps--it keeps pressure behind the individual pump pistons to keep them from rattling against the swash plate.
The loader, and bucket, and hyd. aux. use ONLY the gear pump. They all use the same hydraulic sump and maybe filters.
Example of the separate systems is you could literally have no gear pump and still be able to move the machine. Or have a blown hydrostatic pump or motor and still be able to move the machine. However it depends on where the break or failure occurs; I had a fitting blow apart on one drive motor and everything shut down.
