[vesene]

Hello.

I have a problem whit the toolchange in a MA40HA. It seems like the tool is not unclamped fast enough. The arm sometimes drags the tool out from the spindle whit a banging noise. I have taken the cylinders apart and checked the springs and the draw bar. It did not help. I bleeded the system and there seems to be no air in the hydraulic oil. The problem is present even whit a low tool change speed (25%).

Are anybody having a idea what the cause could be?

Could the hydraulic valve work too slow?

Thanks for any help!

Best regards, Samuel

[Martin_Pedersen]

Call a engineer, some of the MA40H has 2 stage unclamp cylinder, and a some of them has really difficult hydraulic system..

also inside drawbar there a some ruller pins, that rust.

My suggestion if yu are not sure about the mechanical parts then call local service.