Another TNT platform issue…

The second stage of our TNT platform starts sagging on one side after a little while. No external leaks at any hose or fitting

as a test, we filled the reservoir and placed shop towel around the filler. After an hour the second was down a little and fluid had spilled out of the tank

I am guessing the valve in the valve block is leaking and allowing fluid to be pushed back under pressure? Can they be disassembled and cleaned ?

A bad seal in the cylinder who result in a leak outside the cylinder. It s not the case. The pressure in the cylinder is held at the pump.

Well I m guessing the pump design is fairly standard, it’s not like TNT makes them. I was hoping someone had disassembled one before

I m no hydraulic expert but whoever I ve had a leak at a piston, it was pretty obvious. Especially above the water with a very obvious sheen

yes 2 hoses on the cylinder

If there was an internal leak, the fluid from the up line would leak past a seal into the down line, right? Wouldn’t the valve at the pump prevent fluid from coming back into the reservoir?

I guess one way to test would be to add valves at the pump outlet to isolate both lines and see if it still drops

Yes I get that and from there it would push back in the hose. But to get into the reservoir it would have to go thru the valve block so there would have to be a leak there too

these pistons are just two years old and so is the pump.

I know…. Nothing seem to last anymore. Especially those **** SS braided hoses TNT uses! Had to replace two more with rubber hoses.