80 series turbo diesel clutch problem
Submitted: Wednesday, Sep 09, 2009 at 11:42
ThreadID:
72135
Views:
13972
Replies:
7
FollowUps:
20
This Thread has been Archived
Bugs
Hi everyone.
I have an 80 series turbo diesel GXL and recently the clutch pedal does not return all the way back up after being depressed.
Have installed an overhaul kit in the master cylinder and this made no difference.
The pedal comes back up about half way instead of coming back up all the way. The clutch still functions ok.
The master cylinder has a damper/accumulator fitted and I suspect this may be the problem. Have tried bleeding the system several times which results in a slight improvement for a while, then it goes back to the same problem. pumping the pedal quickly in succession improves it somewhat, but again only for a short time.
Has anyone else had a similar problem and if someone could shed some light on the cause would be appreciated. I suspect the damper/accumulator but am not sure.
Thank you.
Reply By: Member - Rob S (NSW) - Wednesday, Sep 09, 2009 at 16:52
Wednesday, Sep 09, 2009 at 16:52
Hi Bugs
Had a similar problem with
mine and i think the petrol's are the same set up.
The pedal wouldn't return all the way.
I just replaced the complete master cylinder gen Toyota $150.
I got my use out of the old one
All fixed and piece of mind as you don't need that to fail in the never never.
Check the slave cylinder the piston can be rusted up and not returning completely ,a seal kit would be ok not much to go wrong there, as long as there is no deep pitting in the cylinder.polish the
bore and piston with a brillo pad.
Rob.
AnswerID:
382524
Follow Up By: Bugs - Wednesday, Sep 09, 2009 at 17:18
Wednesday, Sep 09, 2009 at 17:18
Hi Rob.
Thanks for your response.
I am tempted to replace the lot, but just trying to make sense of the problem seeing the
bore in the master is ok and I put a new piston with seals in it too. Felt ok on
the bench too. I strongly suspect the damper attached to the bottom of the master. But I will get in there and
check out the slave too as I have not done that yet. Also there are no apparent leaks on either cylinder.
Joe.
FollowupID:
650106
Reply By: Bugs - Friday, Sep 11, 2009 at 13:43
Friday, Sep 11, 2009 at 13:43
Hi everyone.
Problem Solved.
It was the clutch damper, the piston inside it had gummed up and seized.
I removed the damper housing and blocked off the port to the damper using a small copper disc. Then replaced the damper housing without the internal piston and seal.
Clutch pedal now returns all the way up.
Anyone else with a damper on the clutch master cylinder who has similar problems can do the same or just find a large enough bolt to replace the damper housing altogether.
A big thanks to everyone who has responded, very much appreciated.
See you in the bush sometime.
Cheers.
Joe.
AnswerID:
382763
Follow Up By: Hairs & Fysh (NSW) - Friday, Sep 11, 2009 at 16:23
Friday, Sep 11, 2009 at 16:23
Hi Joe,
I'm glad you found the cause,
thanks for letting us know what it was,
Cheers.
FollowupID:
650389