I need some help with making a part for a remote brake reservoir project

Hi All!

Wish I had the right tools to do make this simple part, or even if we had a local machine shop, but there isn't one anywhere close to me.

I know there is a lot of people on here who make parts and such, so I thought I would just make post and see if someone could help me out.

I posted this in classifieds WTB area first, but RON the CLASSIFIEDS BULLY suggested I post in the forum.

I need a very simple adapter made, so that I can connect a brake master cylinder reservoir from a Honda/Acura car. I need to adapt it to fit a 1/2" brass threaded connector which I have adapted to a steel brake line. I'm going use this to make a remote brake fluid reservoir for our Deuce.

I got the idea to use this specific Honda/Acura reservoir from a thread here on SS (here), and I want to use this reservoir because it is a single port, and it has a low fluid float switch in it, which I'm going to connect to a buzzer/light alarm inside the cab.


This should help keep a closer check on fluid levels more often, and much easier to top off when needed. And if the fluid does get low, it might at least give us enough time to stop and see if there is a problem.
Plus if for nothing else, its just a bit of peace of mind knowing there is something in place to at least alert if a possible problem arises. As brakes are pretty important on a 14,000+ pound hunk of iron doing 55mph down the highway .


Anyway, I'd like the adapter to be made from aluminum, but I'm open to other options if needed.

Adapter Specs Needed:

It needs to be a simple cylinder shape that is 1.70" inches in diameter. (the diameter is important as this fits inside the reservoir inlet) I used a digital caliber to measure the reservoir port and it measured between 1.67 - 1.70". A band clamp is then used to tighten the reservoir port around this adapter (this is how it is normally mounted on the master cylinder)

It needs to be about 2 inches in height. Then a hole must be drilled through the center all the way through for fluid to travel through. Then this hole must be tapped for 1/2" pipe thread (course thread?) Threads must be at least 1/2" in depth.


Below I tried to make a diagram for a visual reference, thought it might help to see it.

I added a photo of my brass piece which has to screw into this adapter. I also added a photo of my reservoir port with the measurement sizes. You can see the exact same reservoir completed and mounted in this thread here which is where I got the idea from.

I know there are other after-market remote reservoir's that could be used, but I already have this one, and I already have the bracket and other such made and mounted, as I tried to make an adapter from PVC, but was unable to get the correct size, and therefore couldn't tighten down the band clamp tight enough to keep it from leaking.

Please post or PM me if you can help me out with this,
Thank You for Your Time!

I would like to see a GENERIC remote reservoir that has a LOW LEVEL sensor , it just seems to me that with a single circut brake system, I would want as MUCH info on the system as soon as possible, I would rather KNOW the my BRAKE FLUID was going down long before I stepped on the brakes to avoid running over soccor mom

Just a couple friendly corrections. Dial caliper is not spelled caliber. A digital caliper does not have a dial.
Good luck in your quest.

73m819 said:

I would like to see a GENERIC remote reservoir that has a LOW LEVEL sensor , it just seems to me that with a single circut brake system, I would want as MUCH info on the system as soon as possible, I would rather KNOW the my BRAKE FLUID was going down long before I stepped on the brakes to avoid running over soccor mom

Click to expand...

Mecury or merc cruser uses one on there bravo drives that has sensor and mounts with two screws or bolts on a flush service.

What held the Reservoir to the car origionally?

Seems overly complicated your plan..You wish to keep it simple..so did we, all we did was mount a "daihastu" master cylender res. Up near the top of the radiator (opposite the filler cap) and used the same ( M.M.) piping down and through to the vent on top of the deuce M/cyl. There we had brazed a common to obtain A/f nut which fits (over) the daihatsu Piping and into the top of the deuce M/Cyl. there were plenty of car scrapyard types to choose from. Wish we could post a picture but the trucks are now located in thier "new Home" 200 miles away. On reflection in the old gallery I'm sure there is a picture of one such master cyl top up fitted to the M45 fire truck there somewhere.

Am sure someone on here can help you out, but here's another option for you.

Pm sent

Pm sent

Can't we delete our own posts anymore?

Accidental double post, can seem to delete it, so I just edited it to this.

jaxsof said:

What held the Reservoir to the car origionally?

Click to expand...

It was directly connected to the master cylinder on the car.