Picked up old Mustang 330 OMC today.. with issues

[kylem1]

Hello, I'm posting again. I found a deal on CL on an old, guessing mid to late 70s Hdrostatic Mustang 330. It's been repowered with a Kohler. runs good, but no hydraulics. The person I bought it from is a beagle dog raiser, nice man in his late 70s that likes to rabbit hunt. It looks like the end cap fell or blew off of the hydraulic drive pump for the wheels on the left side as you are sitting in it. I bought it reasonable, trucked it home and looking for some answers. The cap, that is no longer there is close to 1.5 inches exactly according to my harbor freight micrometer. Any ideas on what would cause this? Whenever you put fluid in to try to move it, it just throws it out. I could see fresh wetness all over the battery and beyond. I googled pretty hard, I found the pump (same as JD 70), but you cannot by just the cap (probably can't even buy the pump anymore either). I posted a photo under "bobcat 721 repower" it's call mustang hydr pump circled, the pump itself is yellow. Any help or direction is appreciated! Thanks -Kyle

 

[kylem1]

I'm trying to understand hydraulics a little better. The story goes, the left drive motor was not responding, they put it up for sale and in the process of moving it around, the end cap blew off the hydraulic pump and that is the picture I put up. I am trying to understand what would cause the pressure build up in the pump, did it come from the pump itself? The drive motor? Or someplace else, I am trying to figure out a good approach to dive into this. Any help would be appreciate, thank you.

 

[Tazza]

I'm trying to understand hydraulics a little better. The story goes, the left drive motor was not responding, they put it up for sale and in the process of moving it around, the end cap blew off the hydraulic pump and that is the picture I put up. I am trying to understand what would cause the pressure build up in the pump, did it come from the pump itself? The drive motor? Or someplace else, I am trying to figure out a good approach to dive into this. Any help would be appreciate, thank you.

I couldn't find the image you were talking about, can you look up my profile and email it to me?
There should be a relief valve, so the pressure shouldn't have spiked to blow the cap off, but it is always possible.