331 bobcat hyd issues

[dinofossa]

Hi all. I have a 1999 331 bobcat excavator that has hydraulic issues. Here is what i have so far.
The stick out and in is very slow, bucket open and close is very slow, left final drive is slow.
When i stick out and bucket open they both move faster. The same when i close bucket and stick in, they both are faster. All else seems at normal speed. I have completed pressure tests at the main pump they are at pump 1, 2300psi 2, 2600psi and 3 2600 psi under load. The other odd thing i found was that there is about 500psi constant pressure on pump 1 when no load is applied.
Im scratching my head here and any help would be great.

 

[uffex]

Good day Dino
The constant pressure om one pump is correct as the manufacturer uses one pump for pilot pressure 500 psi seems a little on the high side, first check I suggest you make is that the spools for the crawlers are actually returning completely to the neutral position.
Kind regards
Uffex

 

[dinofossa]

Good day Dino
The constant pressure om one pump is correct as the manufacturer uses one pump for pilot pressure 500 psi seems a little on the high side, first check I suggest you make is that the spools for the crawlers are actually returning completely to the neutral position.
Kind regards
Uffex

Sorry for my ignorance, but what are crawlers?

 

[uffex]

Sorry also Dino
Terminology is a real issue in the globe - crawlers = tracks come back if this is still confusing.
Kind regards
Uffex

 

[dinofossa]

Ya i thought you meant tracks. Im an old lineman so i understand that there is different terminology for tools and equipment.
Im going to reset all relief valves and do a flow test. I didnt see anything wrong with the spool valves to the final drives.

 

[dinofossa]

All tests are good except when i hold open the stick there is only about 1000psi meassured at the pump. Could there be port valve issue?

 

[uffex]

Hi Dino
Yes that is a possibility just switch it over and see if the pressure issue shifts.
Kind regards
Uffex