[davis6]

hy i am new on this forum
i have mares speargun 70cm more than 10 years old
it has an oil leak and i want to fix it
i lookin for pnumatic gun diagram and if there is an explanation how to dismantle it
i not certain from where is the leak so thas why i want to dismantle it and check
another question: how much oil do i need to poot inside?
thaks