I'm trying to service my Dad's 5635 SXT. Hasn't been started in several years until yesterday. We put a new battery in it and it fired right up. We cannot find an operator / service manual for it though and I have a few questions since there's no longer a Gehl dealer around: What is crankcase oil capacity with filter change? Where is the crankcase oil drain located? Will all the oil drain out, and if not, how much should I add initially? I think Dad was using 30w oil. Is this recommended? It probably will not be started below freezing temps. Does anyone have replacement filter references for Oil, Air, and fuel filters? I see some on WIX but do not know if they are reliable references. Thanks for your help!