On a cold winter day...........

Bob Bancroft

Well-known Member
Location
Aurora NY
..without much going on, I want to know- what is the deal??????????

When it got cold, I could smell gasoline. I found the shut off on the sediment bowl on my WD45 dripping. I remembered, from my days doing many service calls on these tractors, no standard wrench would fit the hex on the assembly, where it tightens into the bowl base. So I grabbed my metric wrenches, and none would fit! Then I grabbed my little 3/8"x7/16" open end wrench. It wouldn't fit! Then I dug out a little old cheapy end wrench I had ground to fit, and tightened it up.

Then I was recalling how I was frustrated, again, years ago, that the hex on the bowl assembly itself(where it screws into the tank) was also non-standard. Somewhere around here I have a very expensive Snap On 18MM open end wrench I bought just for this purpose. (This was before I had any metric tools.)

Does anyone know why this is? Kind of like, any spark plugs I have used are metric thread.
 
Old stuff can be worn or damaged so wrenches don't fit tight. An older diesel mechanic once told me that in larger (like 9/16" and up) sizes many times metric and standard sizes are close enough to interchange--that's kinda what I've seen too. That said I've always thought the lug nuts on my 2001 GMC Sierra 1500 fell like a loose fit in any socket I tried--metric and standard--I'm not sure what they are supposed to be.

All the glass gas strainer bowls I've seen had kenneled nuts for finger tightening.
 
Those packing nuts on the sediment bowl valves are a maintenance issue. For that reason, I leave mine turned on and put a plastic ball type shut off valve and a filter in the fuel line.
 

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