BCM Community

working on my setup to get my bus converted from HT748 to a manual transmission.
im planning to install a cummins L10 with a RTX11710C overdrive transmission.

while working on my clutch setup,im testing a combination of a hydroboost unit from a chevy with its own powersteering pump driven from the engine and a set of wilwood master and slave.

i still figuring out how to build the shift linkage.being a transit bus,my space near the rear axle is pretty tight.my first idea was a set of cable shifters (tuthill has a system for buses).but im afraid if its smooth enough over the long run and if there will be any binding.
so while playing on the bench with the wilwood cylinders,i had a crazy idea,why not shift with hydraulic cylinders????
if i set up 4 wilwood master cylinders on my shifter base (each direction),run the lines back and set up 4 slave cylinders at the transmission????>>>???
the little play i get till the master build up pressure should be less then on a 40ft linkage??

going crazy??????

any thoughts?????

The first thought I had was that hydraulic cylinders like to be under pressure all the time.  Anytime they are under negative pressure their seal design tends to allow air intrusion.  When you are "pushing" with one master cylinder, the other side is pulling fluid from it's slave cylinder.  I think, anyway.  I'm sure that sealed push-pull master cylinders exist.  I also know that hydraulic control cables exist so what you are thinking of is probably already out there.  They are in use on race cars for various things.

Brian

all cylinders are always pushing!
if i push on one side (master pushed slave will come out)it will push back the slave on the opposite
side.(pushing back fluid into the master of that side)
its the same as pushing the clutch,and the spring force brings back the slave when releasing!

now its going somewhere