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Post by Charles on May 19, 2011 13:02:55 GMT 2
i was lucky. Just aligned mine by eye and no vibrations. i think its more dumb luck than anything else.
Charles
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Post by ronnie on Sept 9, 2011 10:43:49 GMT 2
Hi Mike
As far as the double brace goes it would be better to listen to Jan and find the problem as I have already tried a single brace and it makes no difference. If there is vibrations there is a problem. I removed the front prop yesterday and one universal joint is tight. With the shaft off I quickly run through the vibration at 80km and then it was gone.
Ronnie
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Post by Charles on Sept 9, 2011 13:10:51 GMT 2
Ronnie and how is the vibration without the rear propshaft?
Charles
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Post by ronnie on Sept 9, 2011 13:15:37 GMT 2
Hi Charles I don`t want to look stupid, but I took the rear prop shaft off the previous day and it was only after I had put it back on that I remembered I did not try it. . I will remove it again to try. Ronnie
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Post by Charles on Sept 9, 2011 13:24:48 GMT 2
Ronnie that has happend to me aswell so donk worry.
Charles
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Post by ronnie on Sept 9, 2011 15:18:12 GMT 2
Hi Charles
I have moved the posts to a new thread as this is a popular topic. I have pumped oil through the universal joints on the front prop shaft and then re greased them (Vincents suggestion.) One UJ was tight. I have refitted it and the vibration is back. I think when the pension fund permits I will replace all the UJ`s before doing any thing else. As a matter of interest, unless it was my imagination , without the front prop shaft fitted the steering was appreciably heavier. I wonder if Vincent noticed it as he has the front prop off at the moment.
Ronnie
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Post by ronnie on Sept 9, 2011 15:25:51 GMT 2
Hi Charles
Somewhere along the line I have lost the post with the front prop off. Just to keep things right when I drove without the front prop fitted the vibration was gone when over 80 kmh. With it refitted the vibration is there all the time , right up to 120.
Ronnie
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spikes
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Post by spikes on Sept 9, 2011 16:00:59 GMT 2
Ronnie said "As a matter of interest, unless it was my imagination , without the front prop shaft fitted the steering was appreciably heavier. I wonder if Vincent noticed it as he has the front prop off at the moment." Hi Ronnie That is strange indeed. It should not make any difference Regards Spikes
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Post by marius on Sept 9, 2011 17:09:57 GMT 2
Hi Ronnie
The way the front diff is fitted on the petrol version (directly onto the engine) you will get some feedback from the engine to the diff. That is exactly the problem and if you separate the two - problem solved. That in itself however is not the main/only issue, but only a part of a series of vibration issues.
Vibration on the Niva can not be contributed to one factor only. Today on the way to Potch I felt a bit more vibration than what I am used to and I know it is time to lube the UJoints again. That alone does make a difference.
Marius
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Post by ronnie on Sept 9, 2011 17:58:05 GMT 2
Hi Marius
I am not convinced that separating the diff from the motor will make much difference, as having had a Niva before I did not have any real vibration. The vibration I have now for me is NOT acceptable. Again as I have said before no one has done anything and reported that the vibrations have gone. Also we do not know when mods were done what the vehicle was like before a mod was carried out. I will be happy when someone says the vibrations have gone. I am still waiting. The only one I have tried is the transfer case stabilizer, and there was no difference. (apart from more noise.) I am quite sure I have a problem, it is a matter of finding it.
Ronnie
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Post by marius on Sept 9, 2011 18:27:17 GMT 2
Hi Ronnie
There are so many things that can add/cause vibration on a car it can be a very long list in the end. One thing that comes to mind when I read your post is the flywheel. May even be that the clutch is not centered properly? Even the rear brakes can cause this kind of vibration but I don't think that this could be your problem though. Perhaps you need to re-balance the prop shafts?
Marius
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Post by ronnie on Sept 9, 2011 18:34:14 GMT 2
Hi Marius
I agree there is so many things which can cause vibration, but the Niva is very susceptible in this department. The back brakes are also a prime suspect, so even though I am sure mine are OK it is worth while checking. I am going to borrow a front prop from Vincent tomorrow just to check before I spend money I do not have. There is a problem and I am sure it is small.
Ronnie
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Post by Charles on Sept 9, 2011 18:50:32 GMT 2
I talked to a propshaft spesialist about this. He had a Niva come in with the complaint of vibrations. He balanced the flywheel and clutch assembly, propshafts, intermediate shafts, disks, drums and wheels but still there was a vibration. Then he pulled the front sideshafts and balanced them. He says after that there was no vibration.
Charles
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ladanivabelgium
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Post by ladanivabelgium on Sept 9, 2011 19:17:20 GMT 2
Marius, this is not possible. For one: it's impossible to pop the gearbox into place, and second: once the clutch is released once, the clutch is 100% centered
My Niva has a vibration to now. I'm sure it is a TC bearing problem. I will post the results later when i fixed it with new bearings
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Post by vincentc on Sept 9, 2011 19:29:46 GMT 2
Any rotating component will contribute to the vibration found on the Niva The manual has a very comprehensive description of the type of vibration and the possible source. They describe dancing or shaking tc levers etc. read the manual again (Ronnie too ) and get to know your vibration cause. Regards Vincent
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vincentc
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Post by vincentc on Sept 9, 2011 19:30:52 GMT 2
My steering is lighter but I still have vibration from my intermediate shaft. I need to re align it.
Regards Vincent
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Post by ronnie on Sept 9, 2011 19:34:56 GMT 2
Hi Vincent
I have read it often but nothing seems correct for the vibration I have.
Ronnie
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Post by ronnie on Sept 9, 2011 19:38:03 GMT 2
Hi Jan
I find after 60 kmh I have constant vibration, which is beyond acceptable. Any suggestions you have will be appreciated.
Ronnie
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Post by marius on Sept 9, 2011 19:48:14 GMT 2
Jan you may be right, but why would they recommend that you center the disc in the repair manual as in the picture below? Marius Attachments:
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Post by Charles on Sept 9, 2011 20:33:24 GMT 2
To be able to get the box in. If the plate isn't in the center the spigot shaft gets stuck on it and you can't get the box it. Imagine having that problem with a patrol 4x4 box. That thing ways about 200kg
Charles
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Post by Charles on Sept 9, 2011 20:44:37 GMT 2
Ronnie when you do the uni's pull the front sideshafts and have them balanced aswell.
Charles
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Post by spikes on Sept 10, 2011 8:09:51 GMT 2
Will it be possible to actually balance the NIVA front side shafts? With 2 CV joints to a shaft and will it stay in balance as the center line changes as the suspension flex? I just curious about this
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Post by Charles on Sept 10, 2011 8:35:04 GMT 2
Spikes I have balanced car sideshafts aswell. Had a traffic cop car complaining about vibrations at 200KM/Hm after the balance its perfect.
Anotherthing why my niva might be so vibes free is the bearings on my tc has almost no play.
Charles
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Post by spikes on Sept 10, 2011 8:49:43 GMT 2
Thanks Charles!
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Post by ronnie on Sept 10, 2011 9:20:08 GMT 2
Hi Marius
The centering tool is only to make it possible to allow the gearbox spigot shaft to enter the splines. Any slight mismatch will correct itself as soon as the clutch is pressed. I very often centre it by eye.
Ronnie
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Post by ronnie on Sept 10, 2011 9:27:47 GMT 2
Hi Charles
I would normally balance everything, including all rotating parts of the motor when I was rebuilding one. I would do this no matter what anyone says. Unfortunately these days I don`t have a bottomless pit of money, so I am limited as to what I can spend at the time.
Ronnie
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Post by marius on Sept 10, 2011 9:41:31 GMT 2
I very often centre it by eye. No wonder you struggle with vibration! ;D Marius
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Post by danie on Sept 10, 2011 13:03:49 GMT 2
Any slight mismatch will correct itself as soon as the clutch is pressed. I very often center it by eye. Ronnie 100% correct - I have fitted a few gearboxes in my lifetime by center the Clutch Plate by eye only. The Center Tool has got nothing to do with vibrations on any of the clutch components. As mentioned above, it becomes very difficult to install the Gearbox, when the Clutch Plate is not located exactly at the center of the Flywheel. Therefore the "Center Tool" gets used by pressing the front end into the Pilot Bearing just to line up the Clutch Plate correctly. That's the only purpose of the Center Tool. When the Gearbox gets installed, the front end of the gearbox Spigot Shaft fits into the Pilot Bearing at the center of the Flywheel. So the Pilot Bearing eventually centralize the Spigot Shaft - and therefore the clutch plate as well. I have never had any problems with a collapsed Pilot Bearing, but to my mind a collapsed Pilot Bearing could easily cause vibrating problems. Danie
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Post by marius on Sept 10, 2011 14:21:56 GMT 2
Judging by all of that you don't really need a centering tool after all
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Post by danie on Sept 10, 2011 17:41:22 GMT 2
Judging by all of that you don't really need a centering tool after all Correct - if you do have an extra gearbox Spigot Shaft lying around - you can sommer use that as a "Center Tool" as well. Danie
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