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IDI Engine / Re: Booster full of brake fluid
« Last post by ORCoaster on March 02, 2024, 06:11:17 pm »Yesterday I got to tearing into an MC and proportional valve I found on Craigslist. MC looked pretty good and once I cleaned up the little bit of rust inside the bore I was able to bench bleed it and have it hold pressure with all ports sealed off.
The proportional valve was a different story. If you have ever had the chance to pull one apart the bottom tow caps are under heavy spring pressure and will shoot off at you if you are not prepared for that. I back them out a bit with the wrench then throw a rag over the end and slowly remove them all the while pushing down on the cap. I did this with the first one and sure enough right at the end it kind of sprang at me.
The other side was not pushing at me at all. Odd I thought and once I got it out of the valve body I saw that the spring was rusted up tight and I was just waiting for it to shoot the red valve stem across the room. I was able to pop it apart and clean it up without damage to man or valve. But that was the tightest I have ever seen a spring all rusted up like that.
Today I went out in the sleet and rain and checked on the booster before I tore off the old MC. I couldn't get it to hold a vacuum at all. I was only using a small volume hand pump and the weather got so bad I had to quit, or rather decided enough of this. I might try the old vacuum cleaner I use for the floors in the truck and see if I can get enough volume out and have it hold with that. The weather is not supposed to be much better for a few days so maybe next weekend.
The proportional valve was a different story. If you have ever had the chance to pull one apart the bottom tow caps are under heavy spring pressure and will shoot off at you if you are not prepared for that. I back them out a bit with the wrench then throw a rag over the end and slowly remove them all the while pushing down on the cap. I did this with the first one and sure enough right at the end it kind of sprang at me.
The other side was not pushing at me at all. Odd I thought and once I got it out of the valve body I saw that the spring was rusted up tight and I was just waiting for it to shoot the red valve stem across the room. I was able to pop it apart and clean it up without damage to man or valve. But that was the tightest I have ever seen a spring all rusted up like that.
Today I went out in the sleet and rain and checked on the booster before I tore off the old MC. I couldn't get it to hold a vacuum at all. I was only using a small volume hand pump and the weather got so bad I had to quit, or rather decided enough of this. I might try the old vacuum cleaner I use for the floors in the truck and see if I can get enough volume out and have it hold with that. The weather is not supposed to be much better for a few days so maybe next weekend.