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General Bobcat Skidsteer Forum
How Does It All Work?
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<blockquote data-quote="140mower" data-source="post: 4366" data-attributes="member: 447"><p>BobCat,</p><p> I think Tazza has pretty well nailed one of the best descriptions I've seen. One thing I'll add is that in order for this type of pump to work it needs a charge pump, in this case it is the pump that runs your loader controls. There is a small hole in the mounting plate that "feeds" the hydrostats, this oil cools and lubricates the bigger pumps. It is advised not to pull or tow non-running machines for any distance as there is no charge pressue and the pistons in the hydrostats will over heat and score, ruining a pair of very expensive pumps.</p><p> If you want to see what makes one tick inside, but don't want to gamble the ones in your skid, keep your eyes open for an old John Deere garden tractor with hydrostatic drive. An old 317 would be a good choice as they have the same pump in them only smaller. They're even the same make that are in my 763. (Old JD garden tractors are kind of a hobby for me, but I'm trying to get help kicking the buying habit. Wife says the six she can find are enough.)<img src="https://www.skidsteerforum.com/DesktopModules/AdverForums/ImageGallery/emotion-4.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p> Don</p></blockquote><p></p>
[QUOTE="140mower, post: 4366, member: 447"] BobCat, I think Tazza has pretty well nailed one of the best descriptions I've seen. One thing I'll add is that in order for this type of pump to work it needs a charge pump, in this case it is the pump that runs your loader controls. There is a small hole in the mounting plate that "feeds" the hydrostats, this oil cools and lubricates the bigger pumps. It is advised not to pull or tow non-running machines for any distance as there is no charge pressue and the pistons in the hydrostats will over heat and score, ruining a pair of very expensive pumps. If you want to see what makes one tick inside, but don't want to gamble the ones in your skid, keep your eyes open for an old John Deere garden tractor with hydrostatic drive. An old 317 would be a good choice as they have the same pump in them only smaller. They're even the same make that are in my 763. (Old JD garden tractors are kind of a hobby for me, but I'm trying to get help kicking the buying habit. Wife says the six she can find are enough.)[IMG]https://www.skidsteerforum.com/DesktopModules/AdverForums/ImageGallery/emotion-4.gif[/IMG] Don [/QUOTE]
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