Prevost rebuild (bob's)

[robertglines1]

For the few that have been following progress.. Had a hiccup -- the new clutch master cyl didn't work at initial try.  Aw--shoot moment.  sort of depressing.. had set throw out bearing clearances. within 1000ths.  everything was bled correctly sat for 2 months. then the moment it was needed it failed.. Have a new replacement one in hand.  Using Volvo truck unit like Rusty.  Don't have reason.. All kind of thoughts run thru your head. Am I going to have to pull the engine and separate trans? Something broken inside trans? Clutch frozen? When I figured it out (after many founds) it is a simple fix.  the slave cyl didn't budge when it was suppose to and this led to ?? why not then quickly discovered it was not getting pressure.  After inspection on bench the master would not even work there..  Whew! $95 vs pulling engine or replacing trans parts.   Everything else is good!!! Been a long road.  PS the original was new and bench tested before install and worked after install..   Bob

[bevans6]

Bob, do you have any documentation or notes on your hydraulic clutch setup.  I am looking at converting my MCI with a Spicer to a hydraulic clutch over the existing mechanical and I would love to see how yours is done.  In particular the pedal end of it.

Brian

[B_K]

Does that mean your almost ready to take it to FL for the WINTER?
 BK  

[robertglines1]

Brian; got plans from Rusty's build. maybe he will see this and you can get a copy. It was posted on eaglesinternational .      BK: possible --want to road test for several hundred miles close to home first.  Going Feb--April either way..    Couple of other minor but not use stopping issues that need work.  Have decided it is time for road test!    Make or break it time!  Bob

[rusty]

The air assist on my clutch works very well. I used Eagle parts to make the assist. I used Volvo master cylinder and slave cylinder. I used stainless tubing most of the way. The only problem I have is I am not sure if the clutch is engaging far enough the set the clutch brake. I readjusted every thing but have not crawled under to check. I think I may have not added the distance the control valve travels when it is opening. If that is the case I will have to lengthen the first bell crank. OH WELL

Wayne

[robertglines1]

2 1/4 inch stroke if I remember correct.  After talking to Bruce and seeing your post =I'm going to fix my master cyl prob first and that will hopefully correct the other problem.  I set the total stroke of the clutch brake with feeler gauge when the original master cyl was working. Will be a few days before I know anything but feel better about outcome now.   A very educational experience for me..Sometimes a light switches on--shame it takes so long anymore.  Thanks to all  Bob

[robertglines1]

Changed title because I'm still at a frustration point with this. I thru a new master and slave cylinders at it because it worked before. Just fine. Nothing else has changed! Bled with power bleeder no fluid loss no air in system.  I have more patients than most but am becoming frustrated.  Doesn't make sense to start from square one as it was perfect before. Have been walking away and doing other projects. One thing I noticed my power bleeder on new slave cyl fitting always has small bubbles. like it is leaking around suction hose--I have changed end connections =the same. I can work clutch arm by hand.... I thinking about changing bleeding valve??  Just about all that is left.  Any one had a similar experience??  At this point off wall idea wanted..   Clutch brake is working by manual arm operation that slave cyl is attached to.  It did work with slave cyl before.   Deep breath as I/we will beat this bump in road..  

[rusty]

Just a thought Bob. In the fire did the line burn and did you replace the line with something that will not take the pressure. If the line expands at all you will not get full travel at the slave cylinder. I used stainless steel tubing. On an other note I had all the linkage correct but I did not have the slave cylinder adjusted correctly so my clutch brake would not work.

Wayne

[luvrbus]

One has to compensate for the distance by the tube size I found that out the hard way after about a week   I just got a text from Carlson the guy I sold my TC 10 Allison too lol he said tell you guys with the Eaton read it and weep no clutch pedal needed for his 10 speed  

[bevans6]

If the master cylinder is higher than the slave cylinder, you can try the old gravity bleed trick.  Fill the master, make sure it is bled out correctly, open the slave bleed and just let it sit for a couple of hours, keeping the master topped up.  You can put a little grease around the threads of the bleed screw to keep the tiny bubbles away, if you still get air then you know it's coming from inside.  I personally don't use a power vacuum bleeder, I only hand-bleed.  I find that pushing fluid through is better than pulling it through because you are using the seals the way they are intended to seal, but that's just me.

The way to check if you have it bled out correctly is to limit the slave cylinder so it cannot move (C-clamp around the clutch arm or something like that) and you should have a rock hard, zero movement pedal.

Brian

[muldoonman]

 Bob, my hats off to you on your build and enjoy the posts. I have the patience of a gnat and would either have beat it to death with a hammer or stuck a Allison back in.

[Hard Headed Ken]

Clifford,
Do you know where I can find the dimensions for the TC10? I'm about 90% satisfied with my no clutch pedal Eaton Ultrashift. It's a bit annoying in town, red light to red light because it backs off the throttle to shift and it shifts a lot. I wanna get started on the bus drag racing circuit (not racing in drag) and I believe a transmission that shifts under full power would be much faster. The Allison 6 speed auto won't fit, so I'd like to find out if the TC10 is about the same size as my Ultrashift.

Bob, you've got to upload some pictures and videos of all your work. Your killing us with anticipation.

Ken

Never mind Clifford, I found some dimensions on line and looks like the TC10 is about 3 inches longer. Won't work, too long. 

[Boomer]

Ken, do you still have the Silverside and S50 on ice there?  Are you going to scrap it or ?
Boomer

[Hard Headed Ken]

Mark,
I sold that project to guy who is near Gene's place. I know he's already got one Silverside stored at Gene's and a maybe a couple of Scenic Cruisers some where else. I don't know if he's going to get Gene to finish it or if he's going to try to finish it himself.

Ken

[robertglines1]

Tried to post picture low resolution and dumped whole post. Brief summary; will spend couple more hrs manual bleeding. system worked 2 months ago. down hill from master to slave 20 inches. New 230$ line connecting two.  It doesn't pay to think outside box. Will update in a few days.   Bob