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They can be switched. There's no mechanism inside the tank. The check valve is important though. Be careful with the hoses, they are an odd size and tend to split because they're so old. I spent a lot of time fixing mine, as they kept splitting at the ends, then the check valve went bad. Overall, it was a pain keeping everything working right.

When running, the intake manifold is a vacuum source but depending on the engine load the amount of vacuum can vary wildly. The check valve prevents the intake manifold (engine) from sucking the vacuum BACK OUT of the bottle when the engine load is high and/or the intake manifold vacuum is reduced. It's important that the vacuum bottle keeps enough vacuum to run all the vacuum solenoids. The check valve is a huge part of that.

That's a lot of money for a one-time test. Why not just fill it with water, start the engine, and see what happens? Worst case you spill some water in the cabin. Put a towel under the valves and cleanup should be easy.

If you are going for originality, yes of course... 😉

Nice find Siteunseen! I see '240 in OZ' even posted a picture of a full set of hooks. I'll have to save that one.

That's gold. 20 years; WOW. Thanks for posting it up. Yep, Ive been around the forums a little while!

20 years ago. Good memory.

Wow, that Tacomacompany stuff is top notch. I’ve made all kinds of mods to my Harbour freight/Princess Auto cabinet over the years, and it woks pretty well, but I see the advantages to almost all of their products. Will be upgrading the feed and vacuum controls for sure. The one huge thing I recommend is to make the top glass area into your access door rather than the big door on the right. My compressor is right there, never able to get bigger parts in there anyway And use plexi sheets instead of glass. I buy a 4x8 and chop it up into 16x24 pieces to fit my frame. Disposable and cheep. I use cheap LED strip light strips ringing the entire inside top of the cabinet for lighting. They are surviving just fine. What really amazes me is the amount of sand that makes out of my supposedly sealed seams….

Exactly!! I've had the same discussions here. Not that it'll ever happen, but...

The Mikuni gasket kits (US) don't have in them the pump diaphram, did you get those separately? https://www.jauce.com/auction/1155785394 This what they look like if you don't know. From my experience the gasket kits from Japan do/more likely do come with the pump diaphram than the US kits.

Getting there

Hello Bob Many thanks for the reply and the info. After posting my query I got digging through what seems to now be my archives of pictures I have and came across this (see attached). It was borrowed from an ebay auction a while back, I think it was from a Cybersanford listing. Anyway, it was described as a full set auction. Joseph