Help on Master cylinder check

[ida34]

I got a chance to check out my truck today. I really lucked out. Thanks for all the feedback about checking the fluids. Everything was fine. I will have to put in some lube in the front diff and the Radiator. I had trouble when I got to the master cylinder. Instead of the plug I expected to find I found a plug with a 90 degree angle connector on top that connected to a small metal line that went to a tee attached to a large metal line that seems to connect to the airpack. I think I can disconnect the line then take the plug out but hate to do that without knowing what the line is for. Any suggestions? Anyone know?

Thanks
Chuck

 

[rdixiemiller]

That is a vent line. You must disconnect it and pull the master cylinder plug.

 

[ida34]

Thanks for the reply. I thought this was the fact but I hate to just start disconnecting things.

Chuck