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Pedal box return spring
Posted: Mon Feb 11, 2013 6:25 pm
by bullvine
Hi Guys
Right just a quick overview of what I have done to my bongo.
Manual gear box taken out due to stiff gears. Clutch was checked and it looked new so I put it all back.
I replaced the master cylinder and and slave cylinder and bled the system, all good there.
The gears go in okay with no stiffness now and it seems right.
The problem I have now is the pedal goes down okay but on the return the pedal stops half way then after a second comes back up to the correct position.
I took off the pedal box and pushed the pedal down, once it gets half way the return spring forces it to the bottom of the box, which does not seem right to me. it seems like the return spring is in the correct position however I would expect it to return the pedal once pushed all the way down and let go.
I have checked every thing again and hydraulic pressure is perfect with no air or leaks in the system.
Question.
Does the clutch pressure plate aid the return of the clutch pedal ?
All there is in the system is the return spring in the pedal box and the pressure plate ?
Any advice and pictures would be great.
cheers
Bully
Re: Pedal box return spring
Posted: Mon Feb 11, 2013 9:14 pm
by Darkstar
Worn pivot pin?
Re: Pedal box return spring
Posted: Mon Feb 11, 2013 10:24 pm
by bullvine
The pivot pin is fine, already checked.
It has both nylon bushes .
It just seems that the spring works okay half way then it forces the pedal down.
The thing is it was all good before every thing was changed out.
Does any one know if the pedal return spring should move towards the driver when the clutch is pressed?
Thanks for the reply.
Bully
Re: Pedal box return spring
Posted: Mon Feb 11, 2013 10:37 pm
by Northern Bongolow
i will have a good look at mine tomorrow for you.
when i got mine it was rubbish too. i swapped the 3 piece clutch as the pressure plate was very weak so it used to be very lazy to come back up. then i replaced both the master seals and the slave complete unit before i was anywhere near happy with it.
i then did the fluid and an oil change, this has made it quite good now. it is always knotchy until the oils warm though.
i do find them a crappy clutch and have adjusted the gearchange cables and oiled them and now i can live with it.
i will report back tomorrow,in the meantime someone may post the lushy pics for you to view.
Re: Pedal box return spring
Posted: Tue Feb 12, 2013 7:05 am
by the laird
When the gearbox was out did you ceck the primary shaft sleeve that the clutch bearing runs on.also the clutch arm pivott for wear or damage at pivott point .just a thought cause this could cause bad releaseof the fork hense pedal stic sticky
Re: Pedal box return spring
Posted: Tue Feb 12, 2013 9:59 am
by bullvine
I did check the thrust bearing and lever, however I have a niggling thought it could be sticking.
I also pulled the clutch lever by using and long lever whilst it was all together.. There was lots of force and spring back.
To be honest taking the gearbox out on these is easy so it might have to come to that.
The thing is it drives perfectly just every so often the pedal momentarily stays in the mid position for a second.
I will take another look.
Cheers
Re: Pedal box return spring
Posted: Tue Feb 12, 2013 11:59 am
by bullvine
The latest
This morning I went and checked the movement in the clutch. the lever went in and out with no problems and had loads of pressure also no sticking.
I adjusted the pedal free play and took it for a drive.
The gears go up and down like a new gearbox so i am happy there. The pedal does still momentarily stop then continue up, most people wouldn't realise it.
There is however play side to side on the pedal box but as far as i can see all is good.
I still have concerns on how the return spring is behavouring.
All i need is some one to push the clutch pedal on their manual bongo with their hands and watch the spring, does all of the spring rotate and come towards the drive when pressed. mine does
Thanks for all your help so far.
Bully
Re: Pedal box return spring
Posted: Wed Feb 13, 2013 10:23 pm
by Northern Bongolow
bullvine wrote:
All i need is some one to push the clutch pedal on their manual bongo with their hands and watch the spring, does all of the spring rotate and come towards the drive when pressed. mine does
Thanks for all your help so far.
Bully
checked mine tonight.
the twin side by side coil spring hangs from 2 hangers, these hangers are nylon bushed. the centre of the spring (between the 2 coils) attaches to a heel on the clutch pedal, again nylon bushed.
when you press the pedal the spring is forced forwards towards the front of the bongo with the pedal, so when the pressure is removed the spring pushes the pedal back up.
mine clicks sometimes as one of the nylon bushes has a split in it. check the internals of the bushes if yours are there. if this doesnt sort it try replacing the slave, i did this after trying just a seal kit which didnt quite work as it was allowing fluid to get to the wrong side of one seal internally, but not leaking. maybe its your problem as the fluid is holding the clutch pedal part down.
Re: Pedal box return spring
Posted: Thu Feb 14, 2013 12:39 pm
by bullvine
Thanks for checking.
This is strange, you say that the spring goes towards the front of the bongo when mine goes towards the back of the bongo ie the driver.
I will have to look at it again.
The spring has the two right angle arms that fit into the nylon bushes also the centre part of the spring has a return that fits into a bush connected to the pedal.
I cant see how the spring can be the wrong way round.
Okay cheers
Re: Pedal box return spring
Posted: Thu Feb 14, 2013 8:14 pm
by Northern Bongolow
it isnt that obvious whats actually going on but it sounds like yours is ok, you could not fit it the wrong way round.
with the angles involved the spring is actually being crushed which rotates it as the pedal moves forward taking the centre section forward.
can someone put up a lushprojects picture please.

Re: Pedal box return spring
Posted: Fri Feb 15, 2013 4:09 am
by helen&tony
Hi
Is this the one?
http://lushprojects.com/bongopartsmk2/c ... mgno=.html
I don't see a spring anywhere?
Cheers
Helen
Re: Pedal box return spring
Posted: Fri Feb 15, 2013 11:23 am
by bullvine
Hi to you all
Thanks for all your help so far.
I have spoken to a couple of dealers who sell bongos and can you believe it all of them are automatic so no good there.
I cant see how the spring can be in the wrong position because of the space in which it sits.
The lush projects dont bring enough information on the pedal box, it was worth a go.
After looking on this site and others it appears that it could be just how it is.
Okay cheers again and if it gets any worst then I will have to take it all apart and do a thorough check.
Bully