how to flush a hydraulic system on a 2555 jd

[NathanialBertges]

I was wondering if anyone could help me out on flushing a 2555 johnn deeres hydraulic system.

Thank you

 

[Tx Jim]

Why does it need flushing? Some people flush with diesel but I prefer using cheaper hyd oil on closed-center hyd systems such as JD's.

 

[NathanialBertges]

There are chunks of the parking brake pad floating through it all. Power steering is not working, 3 PT arms or hydraulic outlets are not working.

I swapped filters and cleaned screen but it got me no where.

 

[Tx Jim]

Remove hyd filter with a 5 gal bucket under the opening,crank engine for 30 seconds and report back how much oil is in bucket.

 

[NathanialBertges]

Remove hyd filter with a 5 gal bucket under the opening,crank engine for 30 seconds and report back how much oil is in bucket.

I took the cartrige filter out along with houseing for it. I started the tractor with a bucket under it and in 30 seconds a full 5 gallon pail came out.

After doing this I seen you said crank, I actually started it if it makes a diffrence.

 

[Tx Jim]

From that test it indicates that trans pump should be pumping to spec's

 

[NathanialBertges]

So what's the next step if the pump is pumping to spec

 

[J_J]

What are you saying? Need more data.

Do you have hyd action on any valve? All CC valves are in parallel.


Install a pressure gage and see if the pump is providing flow and pressure.

 

[NathanialBertges]

I'm saying I have no idea how to resolve this issue.

There is no hydraulic pressure at the rear remotes. 3pt does not work at all and power steering is not working properly

 

[J_J]

Since all valves are in parallel in a CC hyd system, if you have pressure at any valve, you should have pressure at the IN port of all valves.

Check your pump relief valve. Check pump shaft for sheared key.

If you have no hyd at all, then check to see if the pump is turning. Is there fluid at the IN port of the pump?