I decided to replace every brake line on the truck so that I know for a fact that one will not fail and that there is not any rust floating around. So my question is when I get this accomplished, do I bleed the booster first? Also on the rear axle do I bleed the wheel cylinder on the very end of the line or the one in front of it. There are two wheel cylinders on each side of the rear and there is a little line in between the two that transfers fluid so which one do I bleed first?

 

someone will help soon.

 

I'm not familiar with the Big Truck brakes, but you can't go wrong bleeding from the furthest wheel first, from the lowest point. You might need to do the lower wheel cylinder twice at each wheel.

A pressure bleeder is about $30 and might pay for itself on your job.

 

I have a '58 F600 and it also has dual wheel cylinders on the rear- an upper and a lower. As I recall the manual specifies which one to bleed first but I don't recall which it is. Since bubbles will rise I would bleed the lower first to eliminate any bubbles from it then go to the upper. Then I'd go back and bleed the lower again and then the upper again. I don't see how you could go wrong doing it that way.

 

Ok thanks for the help! I got the lines replaced and bled them. It stops okay on the first pump then pretty good on the second pump, and excellent on the third. So, I will bleed the whole system again.

 

You MUST bleed the Booster first. It is my understanding you then do LF, RF, LR and then RR. I don't have the double bleeders on my F5, but I seem to recall that you bleed the top first and then the bottom.
There are 2 bleeders on the booster, do the one towards the back first, then the forward one.

 

Yeah, I'm pretty sure you bleed the booster first.

I'm not home right now but I'll look when I get home.

My plan is to install a power-steering pump powered hydro-booster and a split system.

I have never liked this system. get one leak anywhere in the system and you lose all four brakes!!


Regards,


Rick

 

I bled the booster first, but my booster only has one bleeder. and I did the lf rf lr and then rr. It is still spongy so ill bleed them again.

 

I replaced all the lines and bled the system properly and have everything adjusted just right and it still takes half the pedal to stop the truck. It stops great at half pedal and if i push down harder i lock up the rears, so why does it take so much pedal, and the brakes still drag for a second after you let off. Air again?? its driving me nuts!!!