No brakes

[nuljas23]

Brakes worked fine one day and not the next. Pedal goes the whole way to the floor, air system builds and holds air just fine but when you depress the brake pedal you can hear air leaking out of a little mushroom capped valve on the end of an airline against the passenger side firewall in the engine compartment. I'll post pics of the suspected valve if someone with knowledge of the brake system wouldn't mind chiming in I'd appreciate it. Truck is a 1968 M35-A2 white multi fuel.

 

[Flyingvan911]

Sounds like the master cylinder if the pedal goes to the floor. How's the fluid level in the master? Any leaks anywhere? Some more experienced guys will chime in with more info. Most people say working on them isn't hard.

 

[TGP (IL)]

I think you better open the little door on the floor board in front
Of the Drivers seat that exposes the master cylinder and check your brake fluid.

Tom

 

[nuljas23]

No visible leaks, haven't looked in the master yet but that will be my next step when I get time again

 

[Jeepsinker]

That should be the first step every time you drive the truck. Always check the brake fluid level before a drive.

 

[elkhtr]

There are remote reservoir kits out there that eliminate the pain of going through the little trap door, removing vent line , etc, every time you go for a spin.
On my m810 I put it right on the cab corner brace, first thing you see when you climb in the truck.

 

[nuljas23]

That would be something to look into thanks. I haven't driven the truck on the road yet

 

[Jeepsinker]

If you have the sticker denoting " silicone brake fluid only" use only Dot5 brake fluid. It is obvious that you are new here, so don't be afraid to ask questions, but don't be bull- headed. Listen to the advice you are given here. We only want to help you.

 

[nuljas23]

Not sure how I gave that vibe off, I came here asking questions why wouldn't I take the advice?

 

[Jeepsinker]

I'm just saying. Just woke from a nap, maybe I'm grumpy. Sorry if I seem rude.

 

[nuljas23]

It's all good. Thanks for the help

 

[ageregunner]

The remote resevoir works great. I installed one on the firewall, just below the heater duct. I can check level and fill just by lowering side panel. Paid a bit over $50 on ebay. It is made by Wilwood who makes brake components.

 

[nuljas23]

Im familiar with wilwood, I have a Chevelle haha. Happen to have a link?

 

[Flyingvan911]

Not sure how I gave that vibe off, I came here asking questions why wouldn't I take the advice?

It was just a general comment. You'd be amazed how many people come on to ask a question then get their mudflaps in a bunch when people give them advice.

 

[Hitman]

but it should not come up intill they act like that thats how you run off new guys and and the ones that may have a ? just my 2 cents

 

[ageregunner]

Here is link to remote resevoir.









No links to ebay, etc....
Please re-read our house-rules!
Thanks,
G.

 

[rustystud]

If you still have the problem after checking your fluid level. Then your "air-pack" needs rebuilding. Also if your that low on brake fluid, your leaking it somewhere and need to find it and fix it. More then likely a wheel cylinder is leaking at one of the wheels.

 

[Jeepsinker]

Yes, the brake fluid leaks on these trucks are most commonly the wheel cylinders. If you plan to drive the truck on the street it is pretty much a safety requirement that you service all six hubs, and simultaneously either rebuild or replace all of the brake wheel cylinders. I can 100% promise you will find a few cylinders that are leaking, or rusted up internally, or both. You can still get them at Napa for about $28 each.

 

[m109a2]

Check everything before you motor we have old trucks with drum brakes,I wish everybody knew this.Al

 

[jasonjc]

I dove deuce's in the army , but it was not until I had my own did I find the master cylinder! I did drive M939's more and read that -10 cover to cover.