Jensen hydraulic rollers, only spin at top speed !

[Zedde]

I have an old Jensen A521 and have some issues with the roller speed.

 

With speed adjuster opened it will spin at full pelt which is way too fast for anything larger.

 

I can adjust the speed down but it will stop or the rollers will just start crawling round after a short time.

 

Oil is full, filter is clean...... I'm wondering if it is the pump that cannot build enough pressure for the slow speed setting ?

 

Any help would be brilliant

 

 

[Thesnarlingbadger]

I would start looking at sensors. Not 100% but generally issues like I have come across on our chippers tend to to be chased back to electrical issues.