I am going to be replacing my master cylinder out on my 98 D1. Any tips on keeping the air out of the system and bleeding?

 

No matter what you do, you will get air in the system. That being said, make sure to bleed the master cylinder before installing the lines, the do a full 3 pint DOT 4 brake flush and you'll be set.

 

What is the proper way of bleeding the master cylinder before installing the two lines?

 

put it in a vise on a bench while level. Install 2 hoses with fittings into the ports and fill the reservoir. Put the ends of the hoses in the reservoir. Pump the cylinder with a screw driver until no air bubbles come out of the hoses. Install.

This can also be done while mounted in the truck if you goof on something, but be careful about spilling the fluid on anything. Brake fluid will eat paint.

 

Mike's correct on the (3) pints, I actually used (2) quarts to get a decent flush.

luck,greg

 

My old MC was leaking fluid and I did notice it eating the paint. I will have to spray it off with some simple green once I am finished. At least my disco has aluminum body and it leaked in the engine compartment only. I also could not find a fitting to screw into the MC threads so I may just plug it with my fingers while i have a helper pump the brakes. Maybe harbor freight will have an adapter to fit.

 

You might find some plastic plugs somewhere that will fit.

 

When bleeding the brakes, you have to continue to keep rebleeding each wheel till you get clear fluid coming out so 3 is a safer amount.

 

To the OP, most parts houses have bleeder kits for the MC. They come with a ton of plastic fittings and the hoses. You could also just run it by your local brake shop and have them bleed it for you and then run home and install it.

 

These work great.