- Jan 25, 2007
This is really weird, I bought some hydraulic fluid and a filter for my 1974 Case 1737 skid steer and I'm all ready to change the fluid but I can't find an allen wrench that will fit the drain plugs. 3/8 is too big and 5/16 is too small. I tried metric too, 9 mm is too big and 8 mm is too small. 9 mm is actually a bit larger than 5/16 and I thought for sure it would work but it doesn't. It seems the only size inbetween is 11/32, a standard size in a socket set but not in an allen wrench. I called all around trying to find an 11/32 in an allen wrench with no luck, including NAPA, sears, tool king, Lowes, Home Depot, and even called a tool manufacter and searched the web, no luck at all. Any ideas on how to get these plugs out? I was thinking of grinding down the 9mm a bit but I'm afraid if I don't get it right that I may strip out the plugs and be in worse shape than I'm in now.