FEL issue - blowing Hydraulic pump

[winston]

I read back through this whole thread so I ask you, when you first aquired the tractor did all the hydraulics work as they should? If so, did you make any changes before the first pump went South?
I'm sure they probably are but might just check all your lines making sure they are like the drawing. https://store.germanbliss.com/bush-hog- ... lics-parts

[HoyeTractor]

I know from recent experience that those types of problems are extremely frustrating (and expensive).

What does the pump actually do when it 'blows'? Have you taken it apart to see what kind of damage is done to the inside of the pump?

The only thing that really jumps out at me is the hose size seems extremely small. The small hose could be causing enough of a partial deadhead to stress the pump and cause overheating. The statement below backs up this theory

It seems like there were times that the pump blew even when I wasn't using the loader. Specifically one time I was grading my back yard with the 3pt box grader, and on the back and forth passes it blew.

Take a look at the hose size recommendations below. I think the 2210 is in the 5gpm range which puts you three times the 15FPS that is recommended.

https://clearwaterhydraulics.com/index. ... page&id=24

they extend fine but when I try to retract them at full speed, the engine bogs and the relief valve whines.

I believe what you are seeing there is the valve's 'regen' feature. Regen supplies pressure to both ends of the cylinder when lowering to help prevent cavitation in the cylinders. It should not ever exceed the valve's relief pressure setting though so that is a bit of a mystery.
https://www.greentractortalk.com/thread ... -here.749/

[trentonearl]

Winston, I have checked the plumbing several times over, and used that exact chart as a reference. Everything looks good that way.

Thanks for the reference Hoye, I think I've also read that the 2210 spec is 8.2gpm. So according to that chart, looks like I should be at 1/2" lines. Makes sense given that the steel pressure line is 12mm (~1/2") and the steel return line is about 1".

As far as the blown pumps, the outside housing always has a crack in it. I haven't taken any apart to see what failed inside, I always assumed it was an overpressure fault. But maybe it was overheating from the strain of too small hoses?

I guess I'd be interested to hear what other 2210 owners have as far as hose sizes go. The guy I bought the tractor from, I knew he was flipping it, not a long-term owner. He told me that he did replace all the hoses. They definitely looked newer than the rest of the tractor.

If I did go that route, hopefully they could fit as far as threading through the loader frame.

[winston]

The question I asked about whether the hydraulic worked as they should when you first bought the tractor should have a bearing on whether the lines are to small. If it worked correctly at one tiem with the lines then I see no reason the lines could suddenly be the problem. Just a thought.

[HoyeTractor]

I think 1/2" is the typical size for the hose going from the pump to the valve and then back to the tractor. Smaller hoses on the loader itself should not really hurt anything but it will probably make the loader operate slower.

A cracked pump housing is the classic sign of deadheading which is often caused by quick disconnect fittings that are not completely opening when they are coupled. Even though they are new- I would try eliminating the QD couplings on my next attempt just to, at least temporarily, eliminate that possibility.