6441 hydrualic problem

[allstar]

Bought tractor new with a loader in 05. @ about 2 months old hydraulics stopped working, turn-off checked fluid ok no leaks, started tractor begin working. From time to time this would happen it was like the pump lost its prime started breaking the the hydaulic line @ the loader controller to prime. Now the problem is getting worse. Can crank tractor the loader may or may not work, at times it will move very slow and then start working normal. Fluid level ok change filter no help .
At times it work normal
At times it works slow
At times it works not

 

[Renze]

sounds like you need to top up the oil, clean the suction screen, or adjust the flow control lever back to normal. But start with oil level: when parking equipment with extended cylinders, changeing implements with another tractor and park that one with retracted cylinders, you can transfer a lot of oil without any visible leaks...

 

[Renze]

Or see if there is a piece of braided hose in the suction line, which inner liner loosened from the nylon plies: it may suck in, had it once on a fuel hose. very annoying, nothing visible on the outside.

But eliminate all the obvious first....

 

[ixer0]

Hi

It's sucking air somewhere. Either on a joint or through the pump shaft seal.

Mike

 

[tybas27]

If you still have the original fluid in your 6441 try replacing the 80w-90 oil in the system with hi-tran 10w-30 oil.