fj holden clutch problems
fj holden clutch problems
hi fellow holden fans, i have a problem with the clutch on my fj, i cant get get enough adjustment from the adjusting rod, ive replaced the clutch and pressure plate and still cant get enough adjustment. does anyone have any helpful tips?
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parisian62
- Posts: 3997
- Joined: Wed May 11, 2005 2:19 pm
- State: NSW
- Location: Sydney
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Hi bebop,
have moved your post to Sharing advice and experience...hopefully someone can help you out...
regards
Stewart
have moved your post to Sharing advice and experience...hopefully someone can help you out...
regards
Stewart
Feelin free in a '61 FB.
Member of FB-EK Holden Car Club Of NSW Inc.
Check out the Rebuild of Old Timer
Member of FB-EK Holden Car Club Of NSW Inc.
Check out the Rebuild of Old Timer
clutch travel
Hi Bebop,
this is not our domain, but I may have a couple of things you may wish to check or consider.
Not knowing what has been done to you engine trans assembly, I do not have enough information to accurately suggest what the problem is..........
The clutch actuating system on your FJ (assuming you are running original equipment) is mechanical, not hydraulic - as is ours.
The throw-out lever and clutch assembly however is almost identical.
With respect to this I would suggest just a couple of things to check......
Firstly, make sure the bell-housing is firmly bolted up against the engine - there are two dowels which may not be correctly aligned - I have difficulty in imagining how this can happen due to the bolts which also align the bell-housing, but check - the bell housing must be absolutely flush with the rear of your engine.
Secondly, as has been suggested, have a peek at the throw-out lever and its ball nut fulcrum - I don't believe the fulcrum if in good condition will cause loss of clutch - if not fully seated will cause slip - or too much.
The throw-out lever itself may be bent - I have had this one on mine with similar effect.
Now we get to the tricky bit - I'm in an area I have absolutely no experience with here..............
Your clutch is mechanically connected to the clutch pedal - it has a motion which permits flexibility to some extent when the engine is twisting and rolling......... from what I understand of this, and it is years since I have been anywhere near one, there is a counter-shaft arrangement which connects both the clutch pedal link rod and the yoke counter-shaft rods.
The purpose of this is to permit up and down/for and aft movement but is two dimensional only. There is a small amount of movement laterally, but only by the amount of "twist" which can be taken on the throw-out lever adjusting nut.
This counter-shaft has two brackets - one at each end on which the shaft pivots............... it may very well be that there is significant wear in this counter-shaft or the associated linkages.......... I am only guessing here.
You will have to take a very close look at what is happening to that cross=shaft assembly when you depress the clutch - it would have to be extreme to absorb all your available adjustment - I believe, but........?
At the end of the day, what we are looking for is 7/8" pedal clearance from pedal "rest" to the point where the throw-out lever "finds" the clutch bearing/pressure plate contact.
This measurement is taken from inside the cabin - ie, from the pedal rest in its travel downwards to the toe-board and it taken at the pedal pad.
If you only have that much travel, then I would suggest you may be looking at a bent throwout lever - this would be a logical explanation why you cannot adjust the linkage sufficiently................
Hydraulic clutch mechanisms are of course totally different - but a bent throw-out lever will give the same result - adjustment almost to its limit and insufficient clutch release......
Hope this has given you something to check and ponder upon?
frats,
Rosco
this is not our domain, but I may have a couple of things you may wish to check or consider.
Not knowing what has been done to you engine trans assembly, I do not have enough information to accurately suggest what the problem is..........
The clutch actuating system on your FJ (assuming you are running original equipment) is mechanical, not hydraulic - as is ours.
The throw-out lever and clutch assembly however is almost identical.
With respect to this I would suggest just a couple of things to check......
Firstly, make sure the bell-housing is firmly bolted up against the engine - there are two dowels which may not be correctly aligned - I have difficulty in imagining how this can happen due to the bolts which also align the bell-housing, but check - the bell housing must be absolutely flush with the rear of your engine.
Secondly, as has been suggested, have a peek at the throw-out lever and its ball nut fulcrum - I don't believe the fulcrum if in good condition will cause loss of clutch - if not fully seated will cause slip - or too much.
The throw-out lever itself may be bent - I have had this one on mine with similar effect.
Now we get to the tricky bit - I'm in an area I have absolutely no experience with here..............
Your clutch is mechanically connected to the clutch pedal - it has a motion which permits flexibility to some extent when the engine is twisting and rolling......... from what I understand of this, and it is years since I have been anywhere near one, there is a counter-shaft arrangement which connects both the clutch pedal link rod and the yoke counter-shaft rods.
The purpose of this is to permit up and down/for and aft movement but is two dimensional only. There is a small amount of movement laterally, but only by the amount of "twist" which can be taken on the throw-out lever adjusting nut.
This counter-shaft has two brackets - one at each end on which the shaft pivots............... it may very well be that there is significant wear in this counter-shaft or the associated linkages.......... I am only guessing here.
You will have to take a very close look at what is happening to that cross=shaft assembly when you depress the clutch - it would have to be extreme to absorb all your available adjustment - I believe, but........?
At the end of the day, what we are looking for is 7/8" pedal clearance from pedal "rest" to the point where the throw-out lever "finds" the clutch bearing/pressure plate contact.
This measurement is taken from inside the cabin - ie, from the pedal rest in its travel downwards to the toe-board and it taken at the pedal pad.
If you only have that much travel, then I would suggest you may be looking at a bent throwout lever - this would be a logical explanation why you cannot adjust the linkage sufficiently................
Hydraulic clutch mechanisms are of course totally different - but a bent throw-out lever will give the same result - adjustment almost to its limit and insufficient clutch release......
Hope this has given you something to check and ponder upon?
frats,
Rosco
clutch
it may be that the pressure plate is not sitting on the fly wheel properly as ive a hydro its unfamiliar but ive done plenty big trucks and they also have locating dowls for the presure plate, also the clutch plate may be a bit thick think i had a leyland that was the same once the throw out bearing is also worth checking for correct fitment and i had problems with imperial to metric bearing differances they arnt always exsact ,,,if the plate is a bit thick maybe ride the cluch a little to bed it in ,,,every truck ive had a new clutch in had difficulty ajusting properly untill it had done a few ks and bedded in ie after a week working would have to much travel and then it could be ajustted no problem, look inside the bell and get someone one the peddel in and out ,,,,good luck
when they start building them like that again i will buy a new car of them
thanks guys for the advice, rosco ive had a look at all the parts you mentioned and everything looks ok, however the linkages that are connected to the engine block look a bit sus, im in the process of dismatleing these parts i will see what work needs to be done, looks like may have to repair with a welder.
Member FB & EK car club of Victoria
linkages
Hi again,
Unfortunately I do not have access to any measurements......... this will help greatly.
As you are probably aware - the throw-out lever moves quite some distance.
If there is issue with the linkages, I would expect there to be a lot of slack in the mechanism - my suspicion lies still in the throw-out lever itself.
I remember that my bent one looked "as new" until I placed it next to a replacement.............
Guess Sunday is going to be a "workshop day" ?
frats,
Rosco
Unfortunately I do not have access to any measurements......... this will help greatly.
As you are probably aware - the throw-out lever moves quite some distance.
If there is issue with the linkages, I would expect there to be a lot of slack in the mechanism - my suspicion lies still in the throw-out lever itself.
I remember that my bent one looked "as new" until I placed it next to a replacement.............
Guess Sunday is going to be a "workshop day" ?
frats,
Rosco