hi and thanks for any advise someone may leave------i have an old bobcat 313 and i want to change the chain case oil-----im not sure what oil to put back in. anybody have any advise-------i believe i jack up back end 6 inches drain in front under boom then fill from top and check filler bolts on side????? thanks for any help someone can be-------im not a mechanic i purchased an old manual and just wanted to double check what weight of oil i use-----
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