317 hyd problems

[mt406]

Hi I am new to your sight. I have a 317 that I am having problems with the Aux Hyd I am using a Kent KF4 demo hammer to drive posts. It has been working fine now started to run slow and with out much power. and last week quit all together. I call kent and thay said the hyd couplers go bad some times and will not let oil return to tank. I replaced one think it was bad. stil the same. if I run return oil into a container it will work.... My question ???? is there a adjustment on the Aux hyd valve that may be off not letting oil back to the tank. Any input will help Thanks

 

[Tazza]

There are no adjustments on the aux line that i'm aware of. You say it runs when dumping the returning oil to a bucket and you replaced one coupler, could the mating one be bad too?

 

[SkidsDeereMech]

There are no adjustments on the aux line that i'm aware of. You say it runs when dumping the returning oil to a bucket and you replaced one coupler, could the mating one be bad too?

is the hammer the problem?