Torque setting - crank compensating and dynamo nut
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Torque setting - crank compensating and dynamo nut
Hi - just re-building my primary drive side and got stuck at the following points.
i. What torque should the nut holding the compensating shock assembly on to the end of the crank be or is the approach just to lock the system up (ie in gear and have someone sit over the back wheel) and tighten until tight ie common sense.
ii. What torque should the dynamo sprocket retaining nut be tightened to or is it the same approach as for the crank nut? ie lock it all up and just use common sense?
last question - in the manual it refers to a retaining ring for the dynamo nut but there no machined groove for one? (may be I miss-read it)
Any advice gratefully received ASAP as I hope to get her on the road for tomorrow and its due to be sunny!!!!
Stephen
i. What torque should the nut holding the compensating shock assembly on to the end of the crank be or is the approach just to lock the system up (ie in gear and have someone sit over the back wheel) and tighten until tight ie common sense.
ii. What torque should the dynamo sprocket retaining nut be tightened to or is it the same approach as for the crank nut? ie lock it all up and just use common sense?
last question - in the manual it refers to a retaining ring for the dynamo nut but there no machined groove for one? (may be I miss-read it)
Any advice gratefully received ASAP as I hope to get her on the road for tomorrow and its due to be sunny!!!!
Stephen
- ajscomboman
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Re: Torque setting - crank compensating and dynamo nut
Answer to questions 1 and 2 is, Yes! And the original dynamo nut did have a groove machined into it. I have a spare somewhere and I'll load a piccie when I find it, unless someone beats me to it.
- Duncan
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Re: Torque setting - crank compensating and dynamo nut
Stephen, I would say common sense unless someone can give an authoritative answer.
Your nut should look like this: The picture on the spares scheme looks wrong is this the nut you have?
Your nut should look like this: The picture on the spares scheme looks wrong is this the nut you have?
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- ajscomboman
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Re: Torque setting - crank compensating and dynamo nut
The spares service sell a modified nut which is nothing like the original.
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Re: Torque setting - crank compensating and dynamo nut
Thanks folks. The nut holding on the dynamo sprocket is just an ordinary nut, no groove machined into it. I put a new WR key in and it has nipped up very snuggle on the taper, so I don't think it is going to go anywhere!
The lock washer from the spare scheme for the clutch hub nut was really thick. If I hadn't scored it with a coal chisel and pre-bent it a bit before putting it on, there is no way I would been able to bend it up in situ - is that normal?
The lock washer from the spare scheme for the clutch hub nut was really thick. If I hadn't scored it with a coal chisel and pre-bent it a bit before putting it on, there is no way I would been able to bend it up in situ - is that normal?
- 1608
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Re: Torque setting - crank compensating and dynamo nut
As far as I recall there is no lock washer for the clutch centre, just a thick spring washer.
- dave16mct
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Re: Torque setting - crank compensating and dynamo nut
It depends which clutch it is. AMC had a spring washer. Burman had a locking plate which went over a clutch stud and bent up on the nut. I always have trouble bending that.
Make sure you fit a locking device on the dynamo nut or it will come off, fall onto your primary chain, go round and fix itself onto the clutch sprocket and probabely bend the gearbox mainshaft at the very least!
Dave.
Make sure you fit a locking device on the dynamo nut or it will come off, fall onto your primary chain, go round and fix itself onto the clutch sprocket and probabely bend the gearbox mainshaft at the very least!
Dave.
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Re: Torque setting - crank compensating and dynamo nut
Stephen G80 wrote: last question - in the manual it refers to a retaining ring for the dynamo nut but there no machined groove for one? (may be I miss-read it)
This is the original dynamo nut, lock washer and circlip ('Ring').
'There is a tide in the affairs of men
Which taken at the flood............'
Which taken at the flood............'
- Duncan
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Re: Torque setting - crank compensating and dynamo nut
I cant see how this would lock, could you explain?The spares service sell a modified nut which is nothing like the original.
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- robcurrie
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Re: Torque setting - crank compensating and dynamo nut
Either the picture is of a wrong nut, or the nut has been manufactured incorrectly
Rob C
Rob C