ASV PT100 blowing out hydraulic cooler

Hi Folks,

I have an ASV PT100 Forestry track steer that has blown out it's hydraulic heat exchanger (the big radiator behind the engine). I can't see any reason for this, as far as I can tell, any fluid that flows through there goes right back to the tank. In other words, it's on the low pressure side and there's nothing between the cooler and the tank. I had assumed that a component downstream of the cooler (check valve, or what have you) had failed, and allowed the low pressure side to...

ASV PT100 blowing out hydraulic cooler

ASV PT100 blowing out hydraulic cooler