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I'm adding a hydraulic clutch setup to my vehicle and am using a slave cylinder from a 1966 P 350... can anyone tell me the line fitting thread size going into this slave cylinder? Coming from the master it's a standard 3/16ths line and fitting, but on the back of the slave it's larger. I'd love to just bring it to NAPA and try different sizes, but it's a bit stuck in place now... don't ask.
I'm adding a hydraulic clutch setup to my vehicle and am using a slave cylinder from a 1966 P350 can anyone tell me the line fitting thread size going into this slave cylinder?
I doubt you'll find anyone that knows, the P series is the 'red headed stepchild' of Ford trucks, very few members have one or know much about them.
C5TZ-7A508-B .. Clutch Slave Cylinder / Obsolete ~ 22 available NOS - 1965/77 P350/500 I-6 & V8 (gas engines).
I had an earlier version, (different, like nd says) installed for a while and if I'm not mistaken, it was setup for a 1/4" line. Could be the same size.
Buy the line that fits the slave and put adapter at the master. Buy copper-nickel line and wrap 1 turn in it so it has some give when the engine shifts a little.
So, buy the line that fits the slave, and adapt to the master... would I be correct in saying then that a thinner line would cause the slave to not extend fully?
No. The line diameter has no affect on the travel of the slave cylinder. The same amount of fluid will be displaced by the master cylinder. no matter the line size and therefore, the slave will not change either.
If the line is too small by an extreme amount, you might notice additional resistance pushing the pedal and slowness to engage when the pedal is released. I think I used used 3/16" line with mine and it was fine.
Yeah, I ended up getting line run from master to slave, and it seems the slave is not traveling far enough now... it's been a bit of a headache getting this setup together. The master cylinder I'm using is actually a new brake master cylinder from a 66 F100. I figured this would be sufficient since it normally operates four wheel cylinders but now does only one slave.
Perhaps I should put a thicker line, as I am seeing some heavy resistance at the pedal?
One possibility is that your pedal travel is insufficient.
Another is that the cylinder bore diameters are not matched. My setup used a 1" master (actually a clutch mc) and a 1" slave. That means that the slave will travel an amount equal to the master. If the master is larger, it will be harder to push the pedal and the slave will travel farther. If the master is smaller, it will be easier to push the pedal and the slave will not travel as far.
I don't know if there is any issue with using a brake mc in the place of a clutch mc.
It is very hard to push the pedal. So perhaps the MC is bigger. Is there a way other than switching the MC or SC to relieve that pressure and allow the pedal to go in more easily?
However, as I said, the line has no affect on slave travel. If it is not traveling far enough now, figure that out and come up with a plan before spending more money.
My thought about that is something is binding or the mount simply was not strong enough. When you said "it's a bit stuck in place now... don't ask." Maybe now is the time to ask and make sure that nothing bad is happening as a result of it being stuck.
I looked up my post on another website from a while back about the install of the hydraulic clutch on my '61
I need to make some corrections. Should have looked it up instead of going by memory.
I did use 1/4" line, a -4 AN brake hose with adapter fittings, to be specific. So maybe 3/16 is making the pedal harder to push.
The master cylinder was 1 1/8" bore.
05-31-2019, 09:39 AM
P350 can anyone tell me the line fitting thread size going into this slave cylinder?
