The Britisch made Hardinge KL1 Need a electrical diagram

Right now I have 2 lathes Hardinge KL1
That is a Britisch HLV-H
I am working on the first one and right away I have a electrical problem
When I activate the ON button (by pulling it) Some relays /contacters start to rattle Not humming but like a electrical doorbell

Here is a picture of the cabinet


The fabricator of the electrical panel seems to be F&R Cooling LTD


These 3 contacters on the right start to rattle The most right one sparks also


I checked the obvious but could not find anything
So a diagram would be really usefull

Peter