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Severe vibration 1800 to 2200 rpm
- darhijo
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17 Apr 2017 05:33 #180314
by darhijo
Replied by darhijo on topic Severe vibration 1800 to 2200 rpm
hello, no one has solved these vibrations?
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- Dave Biezen
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17 Apr 2017 06:24 - 17 Apr 2017 06:29 #180315
by Dave Biezen
Replied by Dave Biezen on topic Severe vibration 1800 to 2200 rpm
Almost totally gone....after replacing with an original jimny friction plate....the one with the three large springs.
And i carefully thightened the pinion nut on the rear diff
And i carefully thightened the pinion nut on the rear diff
Last edit: 17 Apr 2017 06:29 by Dave Biezen. Reason: Incomplete
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- darhijo
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17 Apr 2017 16:27 #180341
by darhijo
Replied by darhijo on topic Severe vibration 1800 to 2200 rpm
You have replaced the clutch?
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- Dave Biezen
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17 Apr 2017 16:44 #180344
by Dave Biezen
Replied by Dave Biezen on topic Severe vibration 1800 to 2200 rpm
Yes,...i tried a LUK, Valeo and Sachs without improvement.
Then i went with the original clutch from Suzuki and the vibrations were gone for 85%
Then i went with the original clutch from Suzuki and the vibrations were gone for 85%
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05 May 2017 13:09 - 09 May 2017 17:19 #180931
by yakuza
Just a thought:
I work sometimes to minimize vibration in mechanical designs and noticed that the Lukas clutch i bought got three springs while the original japanese has four springs. I am guessing that this has litte or no effect on the clutch function since the spring pressure is as easily divided on three instead of four springs, but this will have an effect on the clutch plates internal vibratory frequency.
On my car there is little or no vibration when there is no load on the drivetrain, but vibrations when accelerating or descelerating.
my vibrations is also most noticable around 2000rpm.
When changing the mass of one of the items in the system, other items can come close to other items internal vibratory frequency and the total system can come out of balance.
We sometimes fix vibratory problems by changing the mass, moving bearing placements or changing rpm.
Edit: Also the transmitted torque plays a part so it is plausible that this is the case.
Prediction of these problems is allmost impossible, but as in all other things mechanical, if it works, do not fix it.
I would recommend changing clutch to original one or at least one with similar mass and design now that we know of these problems.
Norway 2005 Jimny M16A VVT, 235 BFG MT, 2" Trailmaster, ARB rear lck, 17%/87% high/low gears.
Replied by yakuza on topic Severe vibration 1800 to 2200 rpm
Dave Biezen wrote: Yes,...i tried a LUK, Valeo and Sachs without improvement.
Then i went with the original clutch from Suzuki and the vibrations were gone for 85%
Just a thought:
I work sometimes to minimize vibration in mechanical designs and noticed that the Lukas clutch i bought got three springs while the original japanese has four springs. I am guessing that this has litte or no effect on the clutch function since the spring pressure is as easily divided on three instead of four springs, but this will have an effect on the clutch plates internal vibratory frequency.
On my car there is little or no vibration when there is no load on the drivetrain, but vibrations when accelerating or descelerating.
my vibrations is also most noticable around 2000rpm.
When changing the mass of one of the items in the system, other items can come close to other items internal vibratory frequency and the total system can come out of balance.
We sometimes fix vibratory problems by changing the mass, moving bearing placements or changing rpm.
Edit: Also the transmitted torque plays a part so it is plausible that this is the case.
Prediction of these problems is allmost impossible, but as in all other things mechanical, if it works, do not fix it.
I would recommend changing clutch to original one or at least one with similar mass and design now that we know of these problems.
Norway 2005 Jimny M16A VVT, 235 BFG MT, 2" Trailmaster, ARB rear lck, 17%/87% high/low gears.
Last edit: 09 May 2017 17:19 by yakuza.
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- Dave Biezen
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05 May 2017 15:02 - 05 May 2017 15:08 #180932
by Dave Biezen
Replied by Dave Biezen on topic Severe vibration 1800 to 2200 rpm
I guess that the original cluth has much more movement to adapt. For example: the sachs or valeo friction discs have 6 coils/springs...therefore the rotational buffer is very small....lets say 4 or5 degrees. While the original disc has a movement of 15 degrees.
Also the original disc has some sort of HPPE stoppers that also absorb noise and vibration.......
Also the original disc has some sort of HPPE stoppers that also absorb noise and vibration.......
Last edit: 05 May 2017 15:08 by Dave Biezen.
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