Lotus Elan

s4 clutch pedal travel

PostPost by: triumphelan » Sat Feb 25, 2006 1:35 pm

My pedal opperates nearly on the floor ,I have had a new clutch about 6k miles ago and it has always been the same .Is there any way that I can adjust the actuation position of the pedal?do I have a problem with the masteror slave hydraulic cylinders?
regards John
Regards John 1969S4DHC
triumphelan
Third Gear
Third Gear
 
Posts: 297
Joined: 04 Jul 2005
Location: UK North London HA61PY

PostPost by: freddy22112211 » Sat Feb 25, 2006 10:37 pm

John,
If it's working OK that's the best position - it's quite uncomfortable with it higher. Of course it's not good if it's too low - ie need to pump the pedal. You can adjust the clearance at the master cylinder to nearly zero to make it somewhat better, but otherwise you may have a problem somewhere (but unlikely if it's always been like it).
On LHD cars the flexible clutch hydraulic tube can be old and soft and cause this problem.
There's quite a lot of posts on using different sized cylinders for one reason or another in the archives.
Gordon
User avatar
freddy22112211
Second Gear
Second Gear
 
Posts: 190
Joined: 21 Sep 2003
Location: Ulm, Germany

PostPost by: StressCraxx » Sat Feb 25, 2006 11:07 pm

Check the clutch fluid level.

The red plastic hose is a possible problem as discussed above. On LHD cars they tend to melt from the exhaust heat, or just get old and crack and start to leak. Some of of us Yanks have installed braided stainless clutch lines to solve this. The stainless line can act like a hacksaw if allowed to rub on anything, so cover it with a piece of split rubber hose where it rests on or near anything. Its not a bad idea to do this for the plastic line to keep it from wearing through on the chassis.

Also check to make sure the master or the slave is not leaking fluid. If the master leaks, there will likely be fluid on the carpet in the footwell.

It is also possible the slave itself is loose in the fit of the bell housing bracket. The slave is held on the bellhousing with a circlip. After many thousands of miles, the fit loosens up from wear. Adding a second circlip to hold it in place takes away almost all of the slop.

It could need adjustment on the pushrod at the slave if the pushrod locknut has come loose. Instruction on how to do this is clearly illustrated in the shop manual.

Happy Lotusing!

Dan Wise
Elan Dhc/S3-Super Safety
45/7279
There is no cure for Lotus, only treatment.
User avatar
StressCraxx
Fourth Gear
Fourth Gear
 
Posts: 934
Joined: 26 Sep 2003
Location: San Francisco Bay Area, California

PostPost by: gjz30075 » Sun Feb 26, 2006 1:48 pm

Make sure the system is bled really well and the pushrod properly adjusted. Having determined that, have someone in the car to slowly push the pedal down and it should move in sync with the pushrod out of the slave, after the play in the pedal is taken up. You could also have a cracked fork.

Greg Z
'72 Sprint
User avatar
gjz30075
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2835
Joined: 12 Sep 2003
Location: Roswell, Georgia, USA

PostPost by: triumphelan » Mon Feb 27, 2006 9:15 am

When I pump the clutch pedal I get some abnormal results ,the operating point moves to differant places thro the pedal travel .When I bleed the clutch "er indoors" did the pumping ,not a good idea she was more conserned about the neighbours new curtains that the pumping which made her leg hurt .I shall get a competant person ,a man and do it again .wiil post results
Regards John 1969S4DHC
triumphelan
Third Gear
Third Gear
 
Posts: 297
Joined: 04 Jul 2005
Location: UK North London HA61PY

PostPost by: GrUmPyBoDgEr » Mon Feb 27, 2006 9:33 am

Hi John,
I quote your original posting:-

"My pedal opperates nearly on the floor ,I have had a new clutch about 6k miles ago and it has always been the same".

Was it like this prior to fitting the new clutch? ("and it has always been the same")
If not, the depth / length of the new clutch, could it be shorter than the original & thus require more pedal movement until the thrust release bearing comes into contact with the clutch. If so only a high degree of adjustment will compensate and it could be that a longer thrust release bearing carrier would be necessary.
Appologies if I've missed something somewhere along the line.
John
Beware of the Illuminati


Editor: On Sunday morning, February 8th 2015, Derek "John" Pelly AKA GrumpyBodger passed away genuinely peacefully at Weston Hospicecare, Weston Super Mare. He will be missed.
User avatar
GrUmPyBoDgEr
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 3151
Joined: 29 Oct 2004
Location: Burnham-on-Mud

PostPost by: gjz30075 » Mon Feb 27, 2006 12:32 pm

John, it sounds as if the slave cylinder is floating a bit too much. There is a small amount of back and forth action on the slave and I eliminated all the motion on mine by wrapping the slave with a 14g copper wire opposite of the circlip. My slave cylinder is now stays in one spot and the engagement point doesn't change.

Greg Z
'72 Sprint
User avatar
gjz30075
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2835
Joined: 12 Sep 2003
Location: Roswell, Georgia, USA

PostPost by: triumphelan » Mon Feb 27, 2006 8:53 pm

I think I have an hydraulic problem ,master /slave cylinder.
I get judder at low speed takeoff [see earlier posts].I renewed the clutch about 6K miles age ,just to cure this problem which it diddent .I don`t know the age of the master/slave clutch cylinders although there is no apparent fluid loss.
I shall probally change them both.
I`m waiting for a ramp to clear in a friends garage to investigate more.
Regards John 1969S4DHC
triumphelan
Third Gear
Third Gear
 
Posts: 297
Joined: 04 Jul 2005
Location: UK North London HA61PY

PostPost by: purplepete » Mon Feb 27, 2006 10:24 pm

Do you totally trust the guy who put the clutch in for you?-Could it be that packing clips are still under the fingers?
just a thought!
purplepete
First Gear
First Gear
 
Posts: 42
Joined: 07 Feb 2005
Location: Bath,avon/Corsham,Wiltshire

PostPost by: triumphelan » Tue Feb 28, 2006 7:30 am

Good point ,I put the clutch in ?????
Always blame the fitter, thats what they did when I was working
Regards John 1969S4DHC
triumphelan
Third Gear
Third Gear
 
Posts: 297
Joined: 04 Jul 2005
Location: UK North London HA61PY

PostPost by: Dag-Henning » Tue Feb 28, 2006 9:07 am

There are also two different types of clutches you can fit ; with or without centerpad, and release-bearings to go with them ( - flat or round) If you mix them up, you can get into what you describe.

Dag
Elan S1 -64/ Elan race-replica 26R / Works Escort TwinCam -69/ Brabham BT41 Holbay
User avatar
Dag-Henning
Third Gear
Third Gear
 
Posts: 461
Joined: 30 Sep 2004
Location: Oslo, Norway

PostPost by: triumphelan » Tue Feb 28, 2006 9:24 am

My local parts supplier needs to know the number cast onto the slave cylinder,I have given him the girling number 64067950, from Garaths list of everthing fitted to Lotus and where they were soursed from[what a great list this is ,it has save me lots of time and money ]
Has anyone got a slave cylinder handy and can give me the number cast on it
Regards John 1969S4DHC
triumphelan
Third Gear
Third Gear
 
Posts: 297
Joined: 04 Jul 2005
Location: UK North London HA61PY

PostPost by: prloz » Wed Mar 01, 2006 11:50 am

Hi John,
I have a spare clutch slave cylinder.
Number appears to be 64673347.
Regards,
Peter.
prloz
Second Gear
Second Gear
 
Posts: 126
Joined: 31 Jul 2004

PostPost by: triumphelan » Sun Mar 05, 2006 8:01 am

I have bleed the brakes and there is no noticeable differance in pedal operation .I shall replace the two cylinders one at a time starting with the master
Regards John 1969S4DHC
triumphelan
Third Gear
Third Gear
 
Posts: 297
Joined: 04 Jul 2005
Location: UK North London HA61PY

PostPost by: triumphelan » Thu Mar 30, 2006 7:47 am

Could someone check their clutch pedal movement and tell me if there is any change in feel /clutch operation or position the clutch engages when they give the pedal a second /third pump
Regards John 1969S4DHC
triumphelan
Third Gear
Third Gear
 
Posts: 297
Joined: 04 Jul 2005
Location: UK North London HA61PY
Next

Total Online:

Users browsing this forum: No registered users and 3 guests