Both lift cylinders leaking

[TREEFARMER]

I have a T190, started it up and let it run for about 4-5 min to warmup, then noticed hydraulic fluid running out the top of both lift cylinders, in the 4-5 min of warmup it drained half of the fluid. The day before when I shut down everything was fine and on leaks. It has 1800 hours on it. Anyone have any idea on what happen.

 

[flyerdan]

Normally when the machine is just sitting there warming up, there shouldn't be any pressure going to any of the cylinders, and you should be able to disconnect a line without losing any fluid.
The only thing that I can think of is that the retract solenoid stuck, and it was forcing the boom down. It should have been making protest noises as the bypass was activated, and the massive leak could be due to the gland seal not being able to take that much sustained pressure; I don't think they were meant to take sustained full relief pressure.

 

[Tazza]

Normally when the machine is just sitting there warming up, there shouldn't be any pressure going to any of the cylinders, and you should be able to disconnect a line without losing any fluid.
The only thing that I can think of is that the retract solenoid stuck, and it was forcing the boom down. It should have been making protest noises as the bypass was activated, and the massive leak could be due to the gland seal not being able to take that much sustained pressure; I don't think they were meant to take sustained full relief pressure.

It may have just been bad luck, both seals going at once. There is always some pressure on both sides of a cylinder, seems there was enough to push a lot of fluid past your bad seals.