Master cylinder cap

[MrArmyAnt]

There is a brass elbow on mine that has nothing connected to it and the other deuces at the lot did. what was that line for? We got the breaks working at the lot, drove it home, drove it around some trails and parked it. The next day pedal to the floor no brakes.


Also there appears to be a massive metal line just over the break line for the front on the passenger side of the frame that went up into the engine bay of another deuce, and mines cut and crimped. I don't have a horn, is that what its for? **** did it even come with a horn?

 

[91W350]

The small line is a vent line, it is routed to a Tee that is the differential vents on a cross member, then up on the firewall.

 

[Floridianson]

To check the master cyl. try and pull down the rubber boot and don't be right under it. If there is brake fluid in there it is bad.
The line for the horn runs from the drivers side up the firewall to the compressor Gov. then over passenger side top firewall down by airfilter then to the horns. The vent line for the MC crossed over the frame rail and connected to the vent line for the fuel tank. From there went to the slobber tube. The upgrade mod was to seperat that line from the fuel tank vent line and they ran it up the firewall put a U in it and caped it with a vent like the axles have. Some have just the axle vent type put in the cap of the MC.
The only large line that I rember on the passenger side inside frame rail is the fuel line that runs forward or the air line that crosses over right around there but goes to the rear Emg. air fitting.