15 replies to this topic

[carthorse]

Folks with pre-verto clutches - how much travel do you get at the operating lever when the pedals fully down ? Measuring from the return stop to the lever with the pedal down I get a gap of about 4mm.

Reason for asking is that after fitting a new clutch I'm getting clutch drag, I replaced the slave cylinder and hose as well as the they were both in very poor condition.

Don't really know if it was dragging before as the old clutch was slipping so badly when I bought the car it wasn't really driveable.

[nicklouse]

So have you set the throw out stop? And the return stop?

[carthorse]

Yup. Return stop set to 0.50mm with the return spring disconnected and throw out set one flat in from full travel. I've backed the throw out right off again, bled it multiple times etc.

The just wondering if I've fitted a dud or incorrect slave cylinder as the travel seems a little short to me hence the original question. If others are getting a similar measurement I'll whip the engine out and have another look at the clutch on the bench.

[nicklouse]

Here is the thing.

If the slave is moving the arm till the throw out stop is pressing on the cover then it is moving enough. It can not go any further.

How far it actually moves does not matter.

[carthorse]

Here is the thing.
If the slave is moving the arm till the throw out stop is pressing on the cover then it is moving enough. It can not go any further.
How far it actually moves does not matter.

Not sure I follow your drift there. The throw out stop only needs adjusting to set the lever travel after a clutch change as I understand it. If the clutch has been changed or the mechanisms been apart then the stop gets adjusted when the pedal is down after bleeding etc then screwed in one flat to stop you ramming the slave into the end of its travel every time the clutch goes down. (As I understand it?)

I set the stop like this but I'm not sure I'm getting enough throw from the slave cylinder hence the original question

[nicklouse]

Sorry yes, brain going off at a tangent.

On thing you could do is pull Bach the skate rubber boot and see how close the the C clip the plunger is coming.

As to a measurement dirty can't help there.

[carthorse]

Done that, the slave cylinders at the end of its travel. It came off evil bay so I'm wondering if it's actually the right one.

[nicklouse]

Ok presuming it is correct and that the clutch is ok what is the arm like. The ball ok. The pivot bolts not worn etc.

You could try the old Skool jam a nut on the end of the lever push rod to see if you can get it working.

[Blatherskite]

Sorry yes, brain going off at a tangent.

On thing you could do is pull Bach the skate rubber boot and see how close the the C clip the plunger is coming.

As to a measurement dirty can't help there.

Predictive text? Don't understand...

[Cooperman]

The linear travel at the top of the pre-Verto arm must be a minimum of 0.5" and ideally will be 0.55".

[nicklouse]

Sorry yes, brain going off at a tangent.
On thing you could do is pull Bach the skate rubber boot and see how close the the C clip the plunger is coming.
As to a measurement dirty can't help there.

Predictive text? Don't understand...

  something like that.

The linear travel at the top of the pre-Verto arm must be a minimum of 0.5" and ideally will be 0.55".

Oh interesting is this stated anywhere or just one of the many facts you have aquired? As it would have been good to have known years ago but I never found it. ( while playing around with master cylinder bores and strokes.

[Cooperman]

It is what I've measured over the years. I restored an Innocenti Cooper and after all was complete the clutch was dragging. it had been working fine when I took the engine out and the arm was set correctly and seemed to be operating. So I measured the travel at the arm top & it was about 0.35". I then measured my '64 'S' and it was 0.55". So I made a point of measuring several pre-Verto arms and the ones working correctly were all between 0.5" & just under 0.6", so that's where the measurement came from. 

I measured with the stop bolt set to give 0.020" and the overthrow nut either undone or set correctly.

I hope this helps everyone.

[nicklouse]

Nice. Love the impirical way of doing stuff.

[Dan]

You don't use the clutch pedal to set the throw out stop for this very reason. Get a lever in there behind the clutch arm and pull on it by hand. You can feel when it starts operating, then set it one flat in from there.

[carthorse]

It is what I've measured over the years. I restored an Innocenti Cooper and after all was complete the clutch was dragging. it had been working fine when I took the engine out and the arm was set correctly and seemed to be operating. So I measured the travel at the arm top & it was about 0.35". I then measured my '64 'S' and it was 0.55". So I made a point of measuring several pre-Verto arms and the ones working correctly were all between 0.5" & just under 0.6", so that's where the measurement came from. 
I measured with the stop bolt set to give 0.020" and the overthrow nut either undone or set correctly.
I hope this helps everyone.

What was the cause of your reduced travel Cooperman?