Seeking J&E Hall HSS2017i Manual

Hello all
First time user -- be kind to me !
Taken charge of the maintenance of two 10 year old Hall's HSS 2017i compressors. Unfortunately these machines were not on the maintenance radar at the place I work -- refrigeration and electric's catered for by the industrial electricians but the mechanics overlooked -- crazy !
Good thing is these machines have performed well but I think a screw came loose on the "front capacity control slide" and "upset the little feller. The star rotors shattered and a little damage caused.
Spoke with J&E Hall and they aren't able to supply anything but a very basic operator manual as they say this was a very unusual machine that was only made in small numbers.
Anybody able to advise how i can retrieve parts lists and service manual ?
Many thanks
disherwood