I have an (as far as I can tell) 1992 753 and just picked up a 60" two-stage snowblower for it. Digging in to the parts diagram for it, I have the 4.9 ci motor (specced for 14-21 GPM). I believe, based on spec sheets, that my Bobcat has 13 GPM aux flow so I'm just under the specified flow. I tested it out & it works alright, but not spectacularly - and of course, it's something else to tinker with. I can look for a replacement motor for the blower appropriate for my flow (4.0 ci wheel mount) but they don't seem to be easy to find. I see that later 753's had a higher flow rate as did the similar year 763.
A quick eBay search shows multiple replacement pumps out there that are specced to fit the 753/763/773, does anybody know if those replacement pumps might have a higher flow rate (~15 GPM)? I'm trying to figure out how the different models are getting different flow rates, I wonder if some of the other machines drive the hydraulic pumps faster via a smaller pulley, thus a higher flow rate? Half the reason I'm thinking about just swapping the pump is that it's ~30 years old at this point anyways, and I'd assume a fresh unit would perform better in any case.
A quick eBay search shows multiple replacement pumps out there that are specced to fit the 753/763/773, does anybody know if those replacement pumps might have a higher flow rate (~15 GPM)? I'm trying to figure out how the different models are getting different flow rates, I wonder if some of the other machines drive the hydraulic pumps faster via a smaller pulley, thus a higher flow rate? Half the reason I'm thinking about just swapping the pump is that it's ~30 years old at this point anyways, and I'd assume a fresh unit would perform better in any case.
