753 bobcat hyd. leak

[nonafaye]

newbe here. I have a 1993 753 bobcat loader and have had it for about 11 years, bought it from a potash mine auction. This thing had been well used there and had a factory rebuilt engine with about 120 hours on it when I got it and runs great.
The problem is all the Hyd. oil leaks out overnite and drips from the pan under the engine. I raised the cab and saw no visable leaks at all. No leaks under the hyd pump either. I removed the oil tank and left the hose connected to the pump and poured oil in it and could see the hose empty out. Can the oil be leaking thru the pump when not running? And also it does not seem to leak when the engine is running. I can use it and then have to refill tank when I need it next. don't want to do that Need some help Thanks.

 

[J_J]

I have a similar problem with my Case 1845c.

One day soon, I plan to use some of that fluorescent dye sold by NAPA or whoever and put it in the hyd tank.

Then after running the machine for a while, I will let it sit and when the dye comes out a leak point, I should be able to see it with a black light.

The leak will show as a greenish/yellow.