vacuum canister replacements - bj42

[brisveganbj42]

Evening gents.

Just wondering if anyone has any experience replacing the factory bj42 vacuum canister with something smaller?

I picked up one from a 60 and one from an 80. I'm hoping the 80 canister will be sufficient and work with the brake light if there are vacuum issues (although the hard pedal will probably be an indicator).

Heres a pic of the replacement options:

 

[Dieseler]

I am thinking the volume capacity maybe to small I am not sure if the alternator pump produces enough constant supply to keep up with a smaller capacity tank.
I am sure one of the more knowledgable will chime in it may be possible to run a series of smaller tanks to reach max capacity.

 

[BreckenridgeCruiser]

I was going to say, if you can protect it, why go smaller? I'd love to get a big ass one if I can fit it somewhere safe. Knowing you have few more brake applications to get off of the road before it becomes a long stop sounds priceless...

If you want to send me your old one, pm me!

 

[Roberto]

not sure if yours is bad but there is a guy on this side of pond that makes a identical cannister as factory but out of stainless steel. I bought one for mine and was identical and works great. If you need info let me know.

Rob

 

[brisveganbj42]

Mine isn't bad its just big and bulky and in the way of my sliders. Therefore a smaller more compact unit would be preferred.

 

[Volcano cruiser]

I´m curious about this. It is the only thing that is still original in the braking system. Frankly it has always been a bit of a mystery to me how and why it still works after thirty years. I´ll be subsrcibing to this thread. If there are replacements or alternatives I want to learn about them. I could probably use one from an 80 or a 70 as I am running a 1HZ.

 

[brisveganbj42]

The smaller vacuum canister will be fine, I use a 75s one and have had no problems, vacuum light doesn't come on unless brakes are used heavily.

Some info from a mate who replaced his factory bj42 vacuum canister with one from a hj75.

 

[Volcano cruiser]

not sure if yours is bad but there is a guy on this side of pond that makes a identical cannister as factory but out of stainless steel. I bought one for mine and was identical and works great. If you need info let me know.

Rob

Rob,
I'll take the info on the replacement SS cannister.
Thanks,
John

 

[Kroll]

Viar

What about a VIAR 1 gallon air tank?
This works perfectly for the BJ46 that this frame is from.

 

[canucksafari]

What about a VIAR 1 gallon air tank?
This works perfectly for the BJ46 that this frame is from.

It's nice to have some extra vacuum. I like this idea. To the OP, if it is in the way of your sliders, put it somewhere else, like up higher in the engine bay. Just don't forget the check valve.

 

[VE7PGE]

re Vacuum canister, years ago when I had a BJ40 I was getting ready for a camping trip the next day and found my brakes weren't working right, had to use 2 feet to get er to stop!
Found the vacuum canister had a rust hole in it, fast what to do late on a Friday afternoon, I had access to welding gear and some 4inch steel pipe, so cut the pipe to about 12inches long welded brackets that matched the bolt up pattern, salvaged the hose fittings off the old canister and braised them on to the new canister.
Spray panted it black bolted it up connected the input and output hoses and it worked.
So this being said, I suggest all you need is a steel vessel (make one) about the same size and put it where it fits and hook up the two hoses and Bob's your uncle. All it has to do is hold a vacuum!
I think it took me a couple of hours to make one. Are the sliders tubing? How about the bumper, can it be used as a vacuum vessel? You maybe able to get a nice little tank from a truck shop that services air brakes. It shouldn't cost an arm and a leg to replace.

 

[Volcano cruiser]

Nice idea on the Viar tank. Not too costly I already like the Viar stuff for OBA ( here but not yet installed). The only issue is size and space to fit the tank. I also agree with the other poster on some creative solutions for what to make a tank out of, i.e. use a bumper or other tubes that already on the truck. The only concern I´d have is take care in deciding which tube to use. I would probably shy away from making a tank out of tubing that is going to be making contact with things, e.g. rocks, trees, shopping malls parking lot barriers, etc. i would not want to run over a rock with my sliders and have a sharp edge rupture the vacum tank.

 

[christianleeboy]

not sure if yours is bad but there is a guy on this side of pond that makes a identical cannister as factory but out of stainless steel. I bought one for mine and was identical and works great. If you need info let me know.

Rob

Hi Rob- could you share more info on the stainless steel canister? Contact info and price? Thanks!

 

[Awl_TEQ]

I made his vacuum tank. I am building more now if anyone still needs them. These are ready to powder coat.

 

[DEADSALT]

I need one for a 1980 bj40, thanks, pm me or email cderosa@telus.net

 

[Diesel42]

I made his vacuum tank. I am building more now if anyone still needs them. These are ready to powder coat.
View attachment 1198758

Nice work Awl, much respect.
Out of curiosity, what psi does our systems produce and hold in the cannister?

 

[Awl_TEQ]

No idea, but judging by the suction when I remove the line I'd say maybe 5 psi

 

[roscoFJ73]

Nice work Awl, much respect.
Out of curiosity, what psi does our systems produce and hold in the cannister?

No idea, but judging by the suction when I remove the line I'd say maybe 5 psi

The 1HZ are -6psi and many others are about the same.

 

[gsylves1]

Hi Rob- could you share more info on the stainless steel canister? Contact info and price? Thanks!

i have the same question too???

 

[christianleeboy]

i have the same question too???

Message Awl_TEQ here on mud. I got one for my 82 BJ42 and it's awesome!