Posted by Willy-N [72.168.160.211] on Tuesday, December 08, 2015 at 02:06:47 :
In Reply to: Re: Hydro Booster Mounted Pictures posted by Kaegi [76.22.23.236] on Tuesday, December 08, 2015 at 01:02:35 :
This is the way it sits on the frame. The lever that drops down below the frame really hooks onto a pivot above the push rod by about 5 inches or so. You can see that in the picture just done with 2 flat bars hooked together. It is pined to the top one which makes it real long and the push rod is about in the middle of it. So that is why it takes 3 inches of movement to push the plunger in. This long lever is easier to push than the rod is due to leverage. Now I need to move the bottom of the lever 3 inches to the front of the truck to work the plunger. Since the rod on the old Original Master Cylinder only moves 1 inch pushing the plunger in for the 3-5" of travel on the foot pedal. I need to make that movement go 3 inches at least for a full push on the lever working the plunger on the Booster. So the way I was going to do that is using a 6 inch long flat bar hooked to the bottom of the lever that drops down from above using a pin so it can form a Vee. Instead of anchoring it at the bottom on the frame I was going to make a slot with sides it can sit in against a roller bearing to stop wear and allow the flat bar to travel some as it is pushed back by the rod from the brake pedal. Since the flat bar can't go up or down it will sit there in the slot. Having the bearing gives the bar a none attached pivot point that gives as it needs to get longer being pushed back. I can take the 1 inch of movement pushing on the flat bar above this bearing to move the top up to 3 inches depending where I attach it to the bar with a clevis and pin. I will have a threaded connection at the other end hooked to the pedal to fine adjust the play needed. Raising and lowering the pedal rod changes how much the flat bar moves on it's upper end hooked to the one above. It should have the same ratio of 1 to 1 in the end result and have the same pressure to push it minus losses in the action which should be small. Harder to push on the bottom but easier to push on the top making it a wash due to the lever action of the fulcrum points.