gear selection
- Thread starter pete123
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andyb66
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Assuming it's a manual then I would say that there is a problem with the clutch. Probably the pivot has pushed thru the release arm.
is this exspensive
shocker
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Depends if you are doing it or getting it done!
andyb66
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To simply replace the release arm, no. There is a reinforced one avaliable, but anyone with a welder can do the same to a standard replacement arm. These are not expensive, no more then £20.
andyb66
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No fluid in the clutch hydralics, but then that is easy to see
Otherwise, gearbox removal is the only way to tell.
shocker
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That would be your first port of call....good luck,hope its just that otherwise its drop the gearbox,fiddly but do able
andyb66
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Is the problem still the same as before? What do you mean you cleaned out the master cylinder?
There would have to be a lot of air in the system to stop the clutch from working. If the pivot has pushed thru the release arm them it will give them same pedal feeling/symtom as air in the clutch fluid.
If you use a brake pipe clamp on the flexible hose between the master and the slave and you get a good pedal then that at least rules out the master cylinder as being at fault.
i took the master out and there was gunk in there like black dirty fluid at the bottom cleaned it out with new fluid and replaced it the problem is still as was when first had problem no gears but as i said if i select first when engine off then turn on it will pull away ok. also had slave out checked push fork and rod both fine and slave working fine im totaly stumped as to what to do next
mjltigger
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can you describe what you mean by it wont change gears.. how does the clutch feel, what stops it changing gear.. can you take it out of first but not get it into another gear etc.. seems so far peeps are trying to help you but your not helping them much...
ratty
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If the fork is ok then you have air in the system. You need to bleed the clutch system. Did you bleed it after re-fitting the master cylinder?
andyb66
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I have to say I am getting a bit confused now.
Where was the black gunk? In the reservior or in the master cylinder itself? This sounds to me like the seals have worn and this is letting fluid by. Have you tried the clamp on the flexible hose trick yet? This will tell you if you master cylinder is holding pressure.
I also don't think you can properly check the release arm ('push fork') without removing the gearbox.
Where was the black gunk? In the reservior or in the master cylinder itself? This sounds to me like the seals have worn and this is letting fluid by. Have you tried the clamp on the flexible hose trick yet? This will tell you if you master cylinder is holding pressure.
I also don't think you can properly check the release arm ('push fork') without removing the gearbox.
yes sorry if i dont seem to be making things clear but i dont really have a lot of mechanical knowledge.
if i start the engine with first gear selected it will pull away fine, with some effort i can get it out of gear but not into another gear. the clutch peddle feels fine
the fork seems ok when i viewed it through the hole where the slave cylinder goes i have heard that sometimes the push rod punches a hole through it but that was fine.
i blead the system with a pipe and a jar half full of fluid and pipe below fluid until air stops coming out.
but i have also been told that air shouldnt be to much of a problem.
mjltigger
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when you push the clutch pedal, it's the action of the fluid that forces the clutch plates apart so releasing the engine form the drive.. this works because clutch fluid doesn't compress meaning your entire foot movement is transmitted into movement at the clutch..
air however compresses really easily so when you press the clutch pedla with air in the system most of the foot movement is used to compress the air leaving little or nothing to move the clutch plates.... the same thing happens when you have bad seals in the clutch cylinders.. your foot movement pushes fluid through those seals, again wasting your foot movement...
a way of identifying if this is the case is to try pumping the clutch pedal.. if this improves things slightly then you can be sure it is one or the other of those problems, either poor seals at the cylinder or air in the system...
air however compresses really easily so when you press the clutch pedla with air in the system most of the foot movement is used to compress the air leaving little or nothing to move the clutch plates.... the same thing happens when you have bad seals in the clutch cylinders.. your foot movement pushes fluid through those seals, again wasting your foot movement...
a way of identifying if this is the case is to try pumping the clutch pedal.. if this improves things slightly then you can be sure it is one or the other of those problems, either poor seals at the cylinder or air in the system...
battenberg
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A first fix and the one thats cheapest is to check that your hydraulics are working. Simply get under the car with the engine off and watch the action of the slave as yer doris slowly puts the pedal down. (yer may need to pull the rubber back a bit)
The two actions should be perfectly syncronised. She presses pedal down, rod moves...
if it dont, it's yer hydraulics, if it does, its a bigger problem and yer gonna have to get into your clutch.
The two actions should be perfectly syncronised. She presses pedal down, rod moves...
if it dont, it's yer hydraulics, if it does, its a bigger problem and yer gonna have to get into your clutch.
I can't help thinking it might just be possible to make a wee sheet steel plate with a big dent in it and the right shape to fit snug into the release arm , attached to a bit of welding wire, and poke it up from below to repair the hole in the release arm.
Must have a look at this.
CharlesY
Must have a look at this.
CharlesY
