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Hufe Schrauber

Joined: 06/09/2015 Posts: 64 Karma: +22 / -0 Location: Bad Münstereifel 2004 Audi A6 Avant Support
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27-01-2016, 15:01 Subject: |
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Okay guys, thanks a lot!
I, in a moment of mental lapse, attached the impact wrench to the shaft instead of the free-running hub.
That explains a lot...
Big thanks!
Beste Grüße,
Hufe
Translated on 03-07-2026, 15:19.
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Gremlin Schrauber


Joined: 08/18/2005 Posts: 395 Karma: +91 / -0 Location: Grainet 2000 Audi A4 Avant  Premium Support
Autoservice likes this. |
31-01-2016, 12:36 Subject: |
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@ Herbert:
If something in my post is incorrect (thumbs down?), please comment on it with a factual statement so that everyone can learn from it!
1.) It is correct that, like TE, the way this person "abused" the wave has caused a technical defect.
He probably even "screwed" with the internal Torx XZN 10 left-handed, and held the large one in place (meaning tightened, instead of loosened)  .
2.) A specialized tool should only be used for its intended purpose, and that does not include using an impact wrench.
But sometimes, there's just no other way.
Translated on 03-07-2026, 15:19.
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Rüdi Profi-Schrauber

Joined: 03/05/2005 Posts: 1507 Karma: +642 / -0 Location: Nord/Osthessen 2001 Audi A4 Avant Premium Support
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02-02-2016, 14:40 Subject: |
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I only use the impact wrench now because once, the shaft of the starter motor twisted around; the material used in the starter motors is far too soft.
Sommer: A4 B5 Avant 2,5 TDI Quattro Facelift (AKN silber)
Wartet auf H Kennzeichen: A4 B5 Avant 1.9 TDI Quattro (AFN Schwarz)
Winter: A4 B5 Avant TDI Quattro (AFN rot)
Alltags Spardose: Audi A2 1.4 TDI (AMF Silber)
Translated on 03-07-2026, 15:19.
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Herbert Profi-Schrauber

Joined: 06/22/2005 Posts: 4588 Karma: +1321 / -0
Premium Support
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03-02-2016, 0:29 Subject: |
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Using an impact wrench, you can also loosen screw connections on a freely rotating part (such as a screw on a rotor shaft), as long as...
- the applied moment is greater than the sum of the breakaway torque of the connection and the counter-torque of the rotor. The latter depends on the applied angular acceleration and the moment of inertia.
- ensuring that the working moment does not exceed the flow stress limit of the tool and the threaded connection;
Both can be safely achieved with a standard, non-oversized pneumatic impact wrench. You only need to turn the motor housing, not the rotor.
It becomes more difficult to tighten such a screw connection.
The torque wrench must be designed such that the difference between its torque and the opposing torque of the rotor corresponds to the tightening torque of the threaded connection. To achieve this, the torque wrench's limitation must be adjusted to match the rotor's moment of inertia (i.e.,). High-tech torque screwdrivers and calculations are used, or the nut is tightened with an unclear torque value.
Without it, a controlled suit can only be used with external support.
Otherwise, you'll end up paying for it later with a powerful impact wrench.
hg
Herbert.
Horch A4 8K CJCD
Golf 7 DDYA
(+ Audi 80 Avant B4 1Z 475Tkm - habe ich vom ersten bis zum letzten Tag gerne gefahren)
(+ Passat Variant 32B CY 400Tkm)
Translated on 03-07-2026, 15:19.
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Autoservice Profi-Schrauber


Joined: 04/14/2012 Posts: 2130 Karma: +99 / -0 Location: Nähe Düsseldorf
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DieselBär30x likes this. |
03-02-2016, 1:07 Subject: |
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You can make an elephant out of a mosquito.
"Engage the clutch briefly 2 to 3 times (without the rotor spinning too much), and the job is done." You don't need to do a lot of calculations; you just need to use a bit of intuition.
LG, Onkel BM
*Nichts ist einfacher, als sich schwierig auszudrücken......*
**Technische Fragen bitte ins Forum und nicht in mein Postfach**
Translated on 03-07-2026, 15:19.
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Herbert Profi-Schrauber

Joined: 06/22/2005 Posts: 4588 Karma: +1321 / -0
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03-02-2016, 1:13 Subject: |
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And that's what you have in your toolbox. One man's trash is another man's treasure.
Sure, here's the translation:
"Best regards."
Herbert.
Horch A4 8K CJCD
Golf 7 DDYA
(+ Audi 80 Avant B4 1Z 475Tkm - habe ich vom ersten bis zum letzten Tag gerne gefahren)
(+ Passat Variant 32B CY 400Tkm)
Translated on 03-07-2026, 15:19.
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Autoservice Profi-Schrauber


Joined: 04/14/2012 Posts: 2130 Karma: +99 / -0 Location: Nähe Düsseldorf
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03-02-2016, 1:34 Subject: |
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One person has it, the other doesn't. 
LG, Onkel BM
*Nichts ist einfacher, als sich schwierig auszudrücken......*
**Technische Fragen bitte ins Forum und nicht in mein Postfach**
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Gremlin Schrauber


Joined: 08/18/2005 Posts: 395 Karma: +91 / -0 Location: Grainet 2000 Audi A4 Avant  Premium Support
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03-02-2016, 6:27 Subject: |
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Even though it's not relevant:
The vehicle is quite old, and it's uncertain whether it will survive the next generator replacement.
The recommended interval for replacing the slip rings on the T5 motor with AXE is 180,000 km; and in my case, I already had to replace them.
Re-centering the Lima on the console (on the T5) is a whole different story, and one that I don't want to get into... 
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Translated on 03-07-2026, 15:19.
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