Always mention which 4000 you have - pre 65 4 cylinder or 65/newer 3 cyl. 4 cyl didn't have a canister though so you must have a 3 cyl - early one. Unscrew the pressure sender in the left side of the block and install a guage to check pressure. Should read around 60 +/-. I have heard of others having trouble with the gasket at that canister being made poorly - China? if you haven't tossed it out try putting your old gasket back in and see if that helps. As TMO says you can convert that filter to a spin on too.
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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