It seems my hydraulic pump appears to have a bearing failure as front/pully end of pump is getting rather hot and making the belt smoke along with a squeeking noise ( best i can explain it)
Question is there a special allen key for loosening the tension bolt or do i have to pay a vast sum to some south american surgeon to rearrange the shape of my hands to be able to get the thing loose ?

Maybe i am not trying hard enough but if anyone out there has taken off/ replaced the pump any advice would be gratefully received
Thanks