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those who have lost clutch pedal pressure


steve Galant VR4.org Administrator
Key Fob Guy


Galant VR-4 org Post #: 328304 posted 04/14/06 07:20 PM     Remind Me!  Send Private Message   Edit Post      
Trying to get an idea of what is most likely the culprit. If you've lost pedal pressure, was it the master, slave, hard line, something else? Wont be able to get to this thing maybe til Monday. Trying to get an idea of what I might be in for. Forgot to mention, theres plenty of fluid in the master, and i did see a small amount of fluid on the ground when I rolled the car back. Wont go into gear when running, but goes in fine when the car is off.



I know it's a foreign idea for most of us here, but you might want to try taking the car off jackstands.
-mitsuturbo


Edited by steveVR4 (04/14/06 07:26 PM)

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Jason G.
Bourne Employment Supremacy


Galant VR-4 org Post #: 328309 posted 04/14/06 07:34 PM     Remind Me!  Send Private Message   Edit Post      
All 3 places really. If there is still fluid in the master, then I bet it's the slave. Have someone push the pedal in while you look at the slave, fluid should squirt out. It may only leak when pressurized, which is why you have fluid in the reservoir.


Edited by Jason G. (04/14/06 07:35 PM)

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steve Galant VR4.org Administrator
Key Fob Guy


Galant VR-4 org Post #: 328310 posted 04/14/06 07:37 PM     Remind Me!  Send Private Message   Edit Post      
Yeah I've got to get back there with another person to really check it out. Plus, today it was pouring and I was in work clothes.



I know it's a foreign idea for most of us here, but you might want to try taking the car off jackstands.
-mitsuturbo

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vapid
"Private" clan, pivot man
674/1000


Galant VR-4 org Post #: 328322 posted 04/14/06 07:56 PM     Remind Me!  Send Private Message   Edit Post      
replaced the master(which was leaky), slave(to a tel fwd), put in longer clutch rod, and welded the pedal assembly(which helped, but didnt solve it)

what finally solved it was welding a nut behind the pedal assembly where the master rod attaches!

oh, and the clutch fork and pivot ball are new too!


Edited by vapid (04/14/06 08:08 PM)

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steve Galant VR4.org Administrator
Key Fob Guy


Galant VR-4 org Post #: 328324 posted 04/14/06 08:05 PM     Remind Me!  Send Private Message   Edit Post      
Did it fail suddenly (like mine) or over time?



I know it's a foreign idea for most of us here, but you might want to try taking the car off jackstands.
-mitsuturbo

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vapid
"Private" clan, pivot man
674/1000


Galant VR-4 org Post #: 328325 posted 04/14/06 08:05 PM     Remind Me!  Send Private Message   Edit Post      
during upgrade



"Those who hammer their guns into plowshares will plow for those who do not."

-Jefferson

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steve Galant VR4.org Administrator
Key Fob Guy


Galant VR-4 org Post #: 328336 posted 04/14/06 08:30 PM     Remind Me!  Send Private Message   Edit Post      
Ah ok. I'm talking about a failure, not upgrade "issues". Not to say that you can't share your experience.



I know it's a foreign idea for most of us here, but you might want to try taking the car off jackstands.
-mitsuturbo

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SleepinGVR4
What are we going to do today Ferb?
629/2000


Galant VR-4 org Post #: 328383 posted 04/14/06 11:32 PM     Remind Me!  Send Private Message   Edit Post      
Mines got soft recently. I believe its the slave cylinder. I'm gunna replace is when i pull my motor out. Along with a bunch of other things.



Sean

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RvlutionMtrsport
Unregistered


Galant VR-4 org Post #: 328394 posted 04/15/06 12:17 AM     Remind Me!  Send Private Message   Edit Post      
Take a line clamp and put it on the rubber clutch line (if you haven't already put a stainless line in) then try to push the clutch in. If it is rock solid, your master is fine. Good luck with everything.

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Rausch Galant VR4.org Moderator
Rock Star Status


Galant VR-4 org Post #: 328405 posted 04/15/06 01:07 AM     Remind Me!  Send Private Message   Edit Post      
mine sent the pedal to the floor, over about 4 shifts, ended up being the master....but then again a few months earlier, i replaced the slave when i did the clutch... it was a small leak, part inside, part outside, as i found a small amount of fluid under the car and on the floor inside...maybe take a look on both sides of the firewall to see if there is any fluid.



Rance lives here...
Founder of Sold out to BMW Cru, then sold out there too.


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steve Galant VR4.org Administrator
Key Fob Guy


Galant VR-4 org Post #: 328421 posted 04/15/06 05:09 AM     Remind Me!  Send Private Message   Edit Post      
Thanks for the tips. The pedal still comes back up.



I know it's a foreign idea for most of us here, but you might want to try taking the car off jackstands.
-mitsuturbo

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atc250r Galant VR4.org Moderator
Senior Ricer
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Galant VR-4 org Post #: 328483 posted 04/15/06 12:35 PM     Remind Me!  Send Private Message   Edit Post      
A lot of times when one goes bad the other is right behind it in failing. When we used to do them on the 3KGT's a lot at the Mitsu dealer I would always recommend doing both so that I wouldn't be the "crappy tech" who couldn't look into a crystal ball and see that the other part was about to go. If one is bad I'd recommend doing both.

John



"...if they're so into masochism, they should just really go all out and start modifying Mitsubishis. And using them as daily drivers." - Mike R.

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Turbo4door1
Paid to pewp


Galant VR-4 org Post #: 328533 posted 04/15/06 07:58 PM     Remind Me!  Send Private Message   Edit Post      
When it happened to me, it was the slave cylinder on the trans. The seal went out on it. I drove for about 10 minutes after I started noticing it, then shifting got progressively worse, until it got to the point I couldn't get the car in gear with the engine running. No lead up to it really, it just went out.



Danny

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steve Galant VR4.org Administrator
Key Fob Guy


Galant VR-4 org Post #: 328542 posted 04/15/06 09:08 PM     Remind Me!  Send Private Message   Edit Post      
Whats involved in doing the clutch fork, if it turns out the master and slave cylinders are OK? Another member PM'ed me about the same symptom, but the rod is being actuated properly and a new slave didn't help.



I know it's a foreign idea for most of us here, but you might want to try taking the car off jackstands.
-mitsuturbo

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RvlutionMtrsport
Unregistered


Galant VR-4 org Post #: 328547 posted 04/15/06 11:12 PM     Remind Me!  Send Private Message   Edit Post      
You have to seperate the trans and the motor to change the clutch fork. Put a new fulcrum ball in and shim it about the thickness of a quarter while you're in there.

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Besso
Unregistered


Galant VR-4 org Post #: 328566 posted 04/16/06 12:43 AM     Remind Me!  Send Private Message   Edit Post      
That sucks My slave cylinder went out a couple weeks ago and I replaced it with a "Pink" T/E/L one. The symptoms before going out were sluggish and sloppy engage of gears while shifting until it went out entirely. When it did let go out the pedal went straight to the floor after pumping it and getting all the fluid out a couple times then it never came back up. The slave cylinder is an easy fix (10 mins tops). But if it's a clutch fork, good luck man. The steps are pretty much the same as if you were replacing the entire clutch.


Oh yea and if you have to drain the clutch fluid it's just Brake fluid. Dot3 I think

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steve Galant VR4.org Administrator
Key Fob Guy


Galant VR-4 org Post #: 328589 posted 04/16/06 07:26 AM     Remind Me!  Send Private Message   Edit Post      
I'll keep my fingers crossed. Gonna get to work early tomorrow, push the car out of my Director's parking spot where I was parking last week since he was out. Then start wrenching in the work parking lot. I'm gonna get some strange looks and questions.



I know it's a foreign idea for most of us here, but you might want to try taking the car off jackstands.
-mitsuturbo

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steve Galant VR4.org Administrator
Key Fob Guy


Galant VR-4 org Post #: 328887 posted 04/17/06 06:45 AM     Remind Me!  Send Private Message   Edit Post      
Slave cyl is out (that was easy!) but I think its probably OK. It holds pressure (cover the fitting hole with my thumb and push on the rod). The slave pushes on an arm/fulcrum. Theres no provision for it to PULL on that arm, only push. Based on that I'd expect the arm to pop back by itself when you push it. Its not. I can click the arm to the left, or to the right, and it stays there. Am I right that it should pop back by itself?

edit: Why does CAPS show the rod with a notch at the end? I think its just a bad diagram.



I know it's a foreign idea for most of us here, but you might want to try taking the car off jackstands.
-mitsuturbo


Edited by steveVR4 (04/17/06 07:00 AM)

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steve Galant VR4.org Administrator
Key Fob Guy


Galant VR-4 org Post #: 328904 posted 04/17/06 08:04 AM     Remind Me!  Send Private Message   Edit Post      
Quote:

Based on that I'd expect the arm to pop back by itself when you push it. Its not. I can click the arm to the left, or to the right, and it stays there. Am I right that it should pop back by itself?




*crickets*

Anyone? Should the arm push back against the slave cylinder by itself, with the car turned off?

Nevermind, the arm wouldn't push back unless I actually pressed in the clutch by hand using that arm. I'm just feeling the dead play in the arm.



I know it's a foreign idea for most of us here, but you might want to try taking the car off jackstands.
-mitsuturbo


Edited by steveVR4 (04/17/06 09:38 AM)

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s_firestone
Ctrl-Alt-Boost
918/1000


Galant VR-4 org Post #: 329898 posted 04/19/06 05:56 PM     Remind Me!  Send Private Message   Edit Post      
The slave cylinder is a one way hydraulic push. It has no pull of its own(much like a brake cylinder). The return is provided by the spring from the clutch fingers imparted to the clutch arm. The clutch wants to be engaged. The slave cylinder pushes to oppose the tension and moves the arm against the spring tension. The clutch fingers provide the push which in turn depresses the slave cylinder arm back to its inner travel.

You are correct in that it is a lever. But pushing against a spring loaded clutch. It turns an inch of travel into several hundred pounds of force using an incompressible liquid. That in turn is actuating a lever which turns 1" of travel into thousands of pounds of friction holding surface area.

Think of it like a solenoid. It actuates. A solenoid has to have an independent force to return it whether by spring, magnetic, pressure, ect.



Stephen Firestone
1992 GVR4 #918 of 1K

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steve Galant VR4.org Administrator
Key Fob Guy


Galant VR-4 org Post #: 330040 posted 04/20/06 06:42 AM     Remind Me!  Send Private Message   Edit Post      
Thanks, thats an excellent description. Don't know whats wrong in there, but we'll find out when we drop the tranny. The slave is pushing on the fork, but the clutch isn't disengaging.



I know it's a foreign idea for most of us here, but you might want to try taking the car off jackstands.
-mitsuturbo

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Gordian79
teh Gaugemaster


Galant VR-4 org Post #: 330720 posted 04/21/06 11:15 PM     Remind Me!  Send Private Message   Edit Post      
Steve anything i pretty much have the same problem that you have.fix the car all up going for a test drive and reverse grinds then it doesnt go into gear.



#14/1000 SOLD

Riding EVIL 8 nowadays.

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steve Galant VR4.org Administrator
Key Fob Guy


Galant VR-4 org Post #: 331182 posted 04/24/06 06:51 AM     Remind Me!  Send Private Message   Edit Post   
Nah, it will be a couple weeks but I will definitely give an update.



I know it's a foreign idea for most of us here, but you might want to try taking the car off jackstands.
-mitsuturbo

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