Alternator Belt
Alternator Belt
Hi all. I'm doing a full service on my 2005 1200RT, so I decided to replace the alternator belt.
Looking for the correct replacement I found a confusing number of options, some stating Conti-tech 4PK592, some saying conti-tech 4PK611 with various explanations of lengths, others saying the belt should be Conti-tech Elast type ??
Looking at the one on my bike (I think it's original) it says BMW 12.31-7690 571-692637 4PK582 .... if I enter this into Google it seems to say it's been superseded by the PK592 ??
I'm confused :-(
Mat
Looking for the correct replacement I found a confusing number of options, some stating Conti-tech 4PK592, some saying conti-tech 4PK611 with various explanations of lengths, others saying the belt should be Conti-tech Elast type ??
Looking at the one on my bike (I think it's original) it says BMW 12.31-7690 571-692637 4PK582 .... if I enter this into Google it seems to say it's been superseded by the PK592 ??
I'm confused :-(
Mat
Last edited by matgriff on Mon Nov 19, 2018 1:13 pm, edited 1 time in total.
- David.
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Re: Alternator Belt
RealOEM comes up with this 4PK582, http://www.realoem.com/bmw/enUS/part?id ... 1318528385
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Re: Alternator Belt
Just checked the OEM one off my 2012 TC, same as a 2005 Hexhead and the details are exactly as posted above.matgriff wrote:Looking at the one on my bike (I think it's original) it says BMW 12.31-7690 571-692637 4PK582.
I believe the length is 582mm.
Perhaps this is where the confusion comes from.
Last edited by David. on Mon Nov 19, 2018 3:44 pm, edited 1 time in total.
Re: Alternator Belt
Simple answer.....which is anything but!....is that it depends where you buy your belt, because BMW label Continental belts differently to how Continental label them!
I got this reply direct from Continental when I asked for an explanation -
"The Elast designation on a Contitech belt is to show that it has elastic cord members in the belt, this allows the belt to be fitted by stretching into place without any tensioning device or moveable pulleys. Not all manufacturers, especially OE, clearly show on the belt label if the belt is elastic and this can cause confusion. This is especially important as Traditional and Elast belts cannot be interchanged.
To add to the confusion some manufacturers use the production length as the part number and others use the fitted (stretched) length. Because of this it is important to use the cataloguing system to identify the correct belt and not to use the numbers from the old belt.
The Contitech belt will show for information both production and fitted lengths so the belt that you have will be:
4 [number of ribs] PK [rib profile designation] 592 [fitted length] (582) [production length] ELAST [elastic belt brand name]
I have been told previously by our product managers that BMW always gives the production length for elastic belts while we always give the fitted length as our primary number.
The BMW belt 4PK592 equals our 4PK611 (592) ELAST. Production length in brackets.
The BMW belt 4PK582 equals our 4PK592 (582) ELAST. Production length in brackets
Please also note that in many cases a special tool is required to install the Elast belt correctly without damaging the belt or pulleys.
I hope this helps you to identify the correct belt for your bike."
Easy peasy!
Pete
I got this reply direct from Continental when I asked for an explanation -
"The Elast designation on a Contitech belt is to show that it has elastic cord members in the belt, this allows the belt to be fitted by stretching into place without any tensioning device or moveable pulleys. Not all manufacturers, especially OE, clearly show on the belt label if the belt is elastic and this can cause confusion. This is especially important as Traditional and Elast belts cannot be interchanged.
To add to the confusion some manufacturers use the production length as the part number and others use the fitted (stretched) length. Because of this it is important to use the cataloguing system to identify the correct belt and not to use the numbers from the old belt.
The Contitech belt will show for information both production and fitted lengths so the belt that you have will be:
4 [number of ribs] PK [rib profile designation] 592 [fitted length] (582) [production length] ELAST [elastic belt brand name]
I have been told previously by our product managers that BMW always gives the production length for elastic belts while we always give the fitted length as our primary number.
The BMW belt 4PK592 equals our 4PK611 (592) ELAST. Production length in brackets.
The BMW belt 4PK582 equals our 4PK592 (582) ELAST. Production length in brackets
Please also note that in many cases a special tool is required to install the Elast belt correctly without damaging the belt or pulleys.
I hope this helps you to identify the correct belt for your bike."
Easy peasy!
Pete
Re: Alternator Belt
Hi Milleplod, thanks again for the help.... I think you've answered every query I've had about this bike so far :-)
So, the correct belt for my bike is the 4PK592(582) Elast....
Great, thanks
Mat
So, the correct belt for my bike is the 4PK592(582) Elast....
Great, thanks
Mat
Re: Alternator Belt
That's the one! There's a handy little video on YouTube showing how to change the belt - if you've got a large enough spanner, you can easily 'wind' it onto the bottom pulley. https://www.youtube.com/watch?v=YzPTPN98x40 Don't forget to take the main plugs out, it makes it so much easier, and make sure all the ribs of the belt are located inside the 'V' of the top pulley once you've done.
Pete
Pete
Last edited by milleplod on Tue Nov 20, 2018 8:58 am, edited 1 time in total.
- David.
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Re: Alternator Belt
The crankshaft nut is 34mm.milleplod wrote:If you've got a large enough spanner, you can easily 'wind' it onto the bottom pulley.
Re: Alternator Belt
Yep.....I bought a big adjustable, a used one as it was cheaper!
WO Norman Maddox, RAF 85 Sqn, will be turning in his grave! :alas:
Pete
WO Norman Maddox, RAF 85 Sqn, will be turning in his grave! :alas:
Pete
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Re: Alternator Belt
I hope it was a Metric adjustable[emoji3]milleplod wrote: Yep.....I bought a big adjustable, a used one as it was cheaper!
WO Norman Maddox, RAF 85 Sqn, will be turning in his grave! :alas:
Pete
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Re: Alternator Belt
It was indeed! :))B787MECH wrote: I hope it was a Metric adjustable
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Re: Alternator Belt
At £13.99 inc. free P&P, this Conti belt is £10.51 less that the same one from BMW, made by Continental.
https://www.motorcyclefasteners.co.uk/p ... es-4pk582/
https://www.motorcyclefasteners.co.uk/p ... es-4pk582/
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Re: Alternator Belt
That's the one I used when I changed mine,.I kept the old one as a spare on the bike for if it failed whilst away.
The GS 'is' the better bike :-)
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Re: Alternator Belt
The original belt on my 2012 Camhead was changed after 3 years and 10,000 miles when the front engine cover was replaced because of corrosion under warranty.
For the cost of the belt, didn't see any point in paying for labour twice as the belt had to come off anyway.
I could always put the old belt back on and be good to go for another 3 years or 14,000 miles! (Service interval being 6 years or 24,000 miles).
Or, is it like tyres, the belt is now 8 years old and past it's sell by date.
For the cost of the belt, didn't see any point in paying for labour twice as the belt had to come off anyway.
I could always put the old belt back on and be good to go for another 3 years or 14,000 miles! (Service interval being 6 years or 24,000 miles).
Or, is it like tyres, the belt is now 8 years old and past it's sell by date.
Last edited by David. on Tue Aug 11, 2020 7:00 pm, edited 1 time in total.
- emlevy
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Re: Alternator Belt
I got stranded when the belt failed on a hired R1150R in the Dolomites about fifteen years ago. The bike had about 38000 miles and I reckon the belt had never been changed. That was a waste of a good riding day.
2015 R1200RT | 2012 R1200R Classic