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Looking again at the air pack, I have lost another 1/4" of brake fluid in the remote reservoir and the bottom of the air pack canister was wet again. The leak is definitely coming from the canister area. Considering that I have owned this deuce for over 20 years now and I ignorantly never oiled...

I did some more research today and found the old thread about upgrading the hydraulic switch to the air side switch. It mentioned the switch can leak brake fluid so I will check that tomorrow as a possible source of my leak. It sounds like upgrading with Big Mike's kit would be a good idea...

My 1970 M35A2C had been sitting for a few years until I replaced the hydraulic head and injector lines. Now I have turned my attention to the brakes. The master cylinder was dry, and when I filled it I could see where it was leaking out of the front inside the boot. I replaced the mc, no more...

It was a pain to remove the box and place it on top of the engine on a small piece of plywood so I could access the hydraulic head. I had to do that several times. My version with the blower fan opening facing down appears to be beneficial because water cannot flow through the attached 4 inch...

I have noticed that many M35A2s have the cab heater box and blower mounted on its side. The coolant hoses come out the top. My heater box and blower is mounted with the blower hole facing down and the coolant hoses coming out the side facing the engine. Is there some reason why the heater...

I had something unexpected happen today. I was gravity bleeding the top of the airpack after replacing the master cylinder. I loosened the bleeder and heard a momentary hiss of air in the clear bleeder tube I was using. A small amount of fluid came out and then nothing. After a few minutes, I...

Regarding the boot on the front of the MC, I tried and tried to pop it on myself. Every time I would get half on and try to pop the other half on, the first half would pop off. So I had my wife from up top and I popped the lower half on from the underside. When she tried, it popped right on from...

Lori actually likes helping me with vehicle projects. Since her retirement, we have tackled quite a few home and vehicle projects together. It is also psychological support when I get stumped and she offers some solutions. A few times those solutions have been ingenious. She is a civil engineer...

I have the remote reservoir which makes it a bit easier. Bubbles in the jar, close when bubbles stop. My wife will be applying the pressure. She is good at that. ;)

If I remember correctly, it is air pack, right rear, left rear, right middle, left middle, right front, left front?

I spent the better part of today in 103F degrees replacing the master cylinder. Here are a few observations from doing this job. - Definitely remove the 11/16" head fitting on the rear of the master cylinder where the brake line comes out. It gives the extra space to remove the master cylinder...

Well this is funny. After watching Garrett's video again, I checked if my deuce has the fourth bolt on the brake master cylinder. It does not. Some mechanic decades ago, probably in the military, did not re-attach the fourth bolt. Well, that makes my life a bit easier come Saturday's...

Don't forget the prices. Always going up, sometimes monthly. Thank you, Brandon.

So everyone agrees I should leave the difficult fourth bolt off when I install the new master cylinder? Or should I give it a try?

Thank you for all the advice. I'll update the thread when my master cylinder arrives and I give it a go.

Or putting headers on a 289 Mustang where you have to pry the tubes to align the bolt holes, in tight quarters while hunched over the fender. A wise experienced mechanic told me years ago that, if you can extend your ratchet outside the tight work area, things go much smoother. I invested in...

Thanks for that link. I missed that thread while doing my research.

I found NOS for $100 delivered. Now I have to tackle the dreaded fourth bolt. Garrett's video is quite helpful. I can't figure out what that black residue is which was in the bottom of the reservoir. By the way, I found my missing copper lid gasket lying on the boot. Apparently, I had been...

My 1970 M35A2C had been sitting for about 3-4 years now. I fixed the hydraulic head problem that was causing the lack of use. Now I turn to the brake system and discover no brake fluid in the master cylinder. There was a black paste on the bottom of the reservoir. I cleaned out the paste with...

Good news. Just a bit of motor oil in the side cover as it should be. Anyone who has issues with idling after replacing the HH o-rings should try Big Mike's metering shaft o-ring. In my opinion (and Big Mike's), the whole loosening of the clamp to achieve idle issue is due to oversized o-rings...