MTFCA Forum

I repositioned the brake fluid reservoir to a position that is below the brake mechanism.

Does it matter that it is below the mechanism? Must it be higher for gravity feed or is there a negative pressure (positive pressure?) that sucks the fluid into the brake lines.......

Thank you in advance.

Bob

Bob - I assume you have installed disc brakes. Not sure which mechanism you are referring to, but if your reservoir is above the level of the calipers, I think you should be okay. If the reservoir is below the level of your calipers, or if you lack a firm pedal, you may need a 2 lb. residual pressure valve located in line at the outlet of your master cylinder to ensure your caliper pistons just contact the discs - without dragging.
If I’m missing anything above, I’m sure some of the professional mechanics/restorers on this forum will chime in - properly working brakes are essential.

I'm betting you didn't want a plastic part on your firewall. Me neither. Here was my pricey solution.

https://www.ebay.com/itm/304203531519?h ... Swh2xYBqMB

I think it would be a great idea if the vendors offered this reservoir in their brake kits as a deluxe option!

The master cylinder reservoir ought to be at least slightly higher than the master cylinder itself. The system has to be bled properly and fully to get all air out of the lines and the various cylinders. Brake master cylinders typically have a back pressure holding capability to prevent air leaking into the system and to keep a slight set on cups and seals. When a vehicle is in extended storage, it's a good idea to press on the brake pedal once a month or so to replenish the system back pressure and prevent cups from sticking. No need to stomp it; just press on it a couple of times with a moderate pressure.

Bob - Pat brings up an important point. Looking at your pictures, it looks to me like your reservoir is above the level of your master cylinder. If not, you will have problems. If you need to relocate the reservoir, it would be an opportunity to place it high enough to avoid needing a residual valve.

I read your comments and I thank you!

I installed a 1914 gas tank under the seat of this 1912 Torpedo. The reservoir fit perfectly under the seat high above the master cylinder. But due to the gas tank I have to find another higher ground.