New disks - lower brake pedal?

[68shortyford]

Just put disks on my 68 F100 SWB, got all the parts (axels, radius arms, spindles, rotors, calipers, booster, master cylinder, proportioning valve etc.) from a 74 F150 donor. Everything bolted up just fine, but here's the problem, the brake pedal is about an inch closer to the floorboard with this new set-up. Is this right? I haven't bled the brakes yet. Had to mess around with the brake switch also.
Originally the truck had a IL6 and three on the tree. I added PS, PB and a 428/C6 combo But I'm thinking that these changes should not make any difference in the pedal height. What's up?

[cancow]

Does the peddle get back to its normal possition after you pump the brakes a few times. If so, bleed the breaks and see if that helps. If it helps a little but not 100% just give it a couple weeks of driving and it should be fine.

[fordman]

it could be the difference in having power brake versus manual brakes. if thats what you did.

[flyboy2610]

I would bleed the brakes, then see what the pedal does.

[68F250]

Sounds right. '73 and later F100/150 have a lower brake pedal (it's a feature). They mention it in the sales brochure too.

[390Nut]

Geez Mike, you dont wast any time, do ya?

Hows it working for you, aside from the different pedal height? (sorry, I forgot to mention that might be the case! )

[mrsnicks]

I too am planning to convert my 1969 F100 to front disc brakes. I got the spindles, calipers, dust shields, pads, brake hoses, bearings etc.. I got the whole package for reference. I have yet to buy any new parts to replace the older ones.

My question, I did not get the proportioning valve from the other truck. I assume this connects to the master cylinder? Is this a necessary addition to make the conversion work? Also is there anything else required that I did not get to make the conversion work?

Thanks,
Patrick

[fordman]

you'll need the brake hose brakets where it hooks to the frame and changes from rubber to steel lines.

[72hiboy4x4]

yes you do need the P/B proportioning valve! otherwise the brakes will not work correctly.

[mrsnicks]

Thanks for the help. I have since found the tech article about swapping over, and I believe I am good. I may have screwed up because I got spindles off a '76, but no Ibeam, and from what I read they kingpins are different and don't match up.


Back to the junkyard to find another donor.

[68F250]

You do know you have to change out the master cylinder with one for disc brakes?

[mrsnicks]

Yeah, I read that too, but if I read correctly I can still use my power booster. I did upgrade to power drum brakes, so I already have a booster on the truck.

Thanks again for the helps and tips.

Patrick

[mrsnicks]

Okay, the spindles I got were procured for me by a friend, and he thought it easier to cut the ibeams with a torch than to unbolt everything.

Problem is he doesn't remember the year of the truck, and I cannot tell if they spindles are 73-74 or 75-79. Please let me know which version of the spindles this is.

Thanks,
Patrick

[spartman]

What are the numbers on the spindles?

That could help to identify them

[FORDification]

Right....get the date code and that'll tell for sure.

It's kinda hard to tell from the picture, but it appears you have the '73-'74 version, since the bump stop is slightly different from my '79s: