I found an older MICO lever lock and thought it would be a good addition to my '52 B-3 PW resto I am doing. This is the model of lock without the electronic low pressure warning system, and with one bleeder on top.
I have a (new) stock single chamber MC under the floorboard, and a frame rail mounted Midland vacuum booster (professionally rebuilt).
I got a kit for the MICO that consisted of a new piston and lever assembly. I cleaned the MICO well and put it back together.
I plumbed everything correctly, I believe. WHen I went to use it, the MICO built/held pressure well and held the truck on a slope. BUt, when I release the lever, the brakes remain locked. To release the brakes I have to crack a bleeder a bit.
I have been talking to the MICO tech, and he suggested I do a test involving cracking the line at the MC outlet. If it releases the brakes, then it isolates the problem to the MC he said. I did this and indeed the brakes released.
If I do not use/activate the MICO, the brake system seems to work fine, although I am simply driving it a little on my farm, it is not road legal yet.
I read a post in some archives about having to pump the brakes hard when dropping the lever to release the pressure, but when I tried that it did not help. I also increased the brake pedal free play to see what that did , but it did not help either.
Is is possible it is a MICO issue? Ideas welcome.
I have a (new) stock single chamber MC under the floorboard, and a frame rail mounted Midland vacuum booster (professionally rebuilt).
I got a kit for the MICO that consisted of a new piston and lever assembly. I cleaned the MICO well and put it back together.
I plumbed everything correctly, I believe. WHen I went to use it, the MICO built/held pressure well and held the truck on a slope. BUt, when I release the lever, the brakes remain locked. To release the brakes I have to crack a bleeder a bit.
I have been talking to the MICO tech, and he suggested I do a test involving cracking the line at the MC outlet. If it releases the brakes, then it isolates the problem to the MC he said. I did this and indeed the brakes released.
If I do not use/activate the MICO, the brake system seems to work fine, although I am simply driving it a little on my farm, it is not road legal yet.
I read a post in some archives about having to pump the brakes hard when dropping the lever to release the pressure, but when I tried that it did not help. I also increased the brake pedal free play to see what that did , but it did not help either.
Is is possible it is a MICO issue? Ideas welcome.
Comment