Hi Everyone
Does anyone know what the torque setting is for the nut on the pulley wheel shaft of a Lucas Alternator. When I took off my faulty alternator I was surprised how slack the nut was. You can't trust a mechanic to do anything properly-oh wait that was me!
Cheers
Alan
Torque setting for alternator driveshaft nut
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ALAN COCHRANE
Topic author - Posts: 712
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#1 Torque setting for alternator driveshaft nut
Alan Cochrane
1961 S1 OTS,1968 Triumph TR250, 1971 Triumph GT6 Mk3, 2008 Porsche Boxster RS60 Spyder
1961 S1 OTS,1968 Triumph TR250, 1971 Triumph GT6 Mk3, 2008 Porsche Boxster RS60 Spyder
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#2
Like most of these things you probably won't find an exact figure in the manuals.
It should have a spring washer under it; I did mine up tight (not effing tight) with an ordinary ring spanner and I usually use Loctite for things like that that rotate quickly.
It should have a spring washer under it; I did mine up tight (not effing tight) with an ordinary ring spanner and I usually use Loctite for things like that that rotate quickly.
Andrew.
881824, 1E21538. 889457. 1961 4.3l Mk2. 1975 XJS. 1979 MGB (supercharged).
Adelaide, Australia
881824, 1E21538. 889457. 1961 4.3l Mk2. 1975 XJS. 1979 MGB (supercharged).
Adelaide, Australia
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ALAN COCHRANE
Topic author - Posts: 712
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#3
Thanks for the reply Andrew. The only figure I could find was 25lbft which can only be a little more than finger tight by my reckoning.
I'll keep searching but like you I'll probably just give it some welly with a standard ring spanner.
Alan
I'll keep searching but like you I'll probably just give it some welly with a standard ring spanner.
Alan
Alan Cochrane
1961 S1 OTS,1968 Triumph TR250, 1971 Triumph GT6 Mk3, 2008 Porsche Boxster RS60 Spyder
1961 S1 OTS,1968 Triumph TR250, 1971 Triumph GT6 Mk3, 2008 Porsche Boxster RS60 Spyder
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PeterCrespin
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#4
" The only figure I could find was 25lbft which can only be a little more than finger tight by my reckoning."
What reckoning is that then Alan? Your handshake must be a bone-crusher
Find something that weighs 25 lbs - like 11 bags of sugar or a modest weight flywheel. Not insignificant. Then put a foot long ring spanner onto a small nut and rest your heavy weight on the free end. That is not trivial torque. The drive shaft flange bolts aren't tightened a lot more. Even the big end nuts are only in the mid thirties.
"I'll keep searching but like you I'll probably just give it some welly with a standard ring spanner."
Why keep searching? 25 sounds a perfectly reasonable number.
Andrew strikes me as a scientific sort of chap and not given to wellying a ringy with abandon. Tightening torque is dictated in large measure by the dimensions of the fastener. It's not a huge nut...
I've practically never used a torque wrench except on major fasteners. There are advantages to messing with mechanical stuff more or less non-stop for 45 years, amongst them a calibrated forearm. Mine starts down near the wrist at 'finger tight' through 'hand tight' to 'snug' then 'firm' and along a range of settings up to Andrew's 'effing tight' near the elbow. The upper arm (farm machinery torques) and shoulder (railway equipment)remain un-calibrated and Shipwright's Leg, as applied to 6 foot open enders is a sight to behold I'm reliably informed... Not so much foot pounds as foot pounding, whole body jumping etc. :D
What reckoning is that then Alan? Your handshake must be a bone-crusher
Find something that weighs 25 lbs - like 11 bags of sugar or a modest weight flywheel. Not insignificant. Then put a foot long ring spanner onto a small nut and rest your heavy weight on the free end. That is not trivial torque. The drive shaft flange bolts aren't tightened a lot more. Even the big end nuts are only in the mid thirties.
"I'll keep searching but like you I'll probably just give it some welly with a standard ring spanner."
Why keep searching? 25 sounds a perfectly reasonable number.
Andrew strikes me as a scientific sort of chap and not given to wellying a ringy with abandon. Tightening torque is dictated in large measure by the dimensions of the fastener. It's not a huge nut...
I've practically never used a torque wrench except on major fasteners. There are advantages to messing with mechanical stuff more or less non-stop for 45 years, amongst them a calibrated forearm. Mine starts down near the wrist at 'finger tight' through 'hand tight' to 'snug' then 'firm' and along a range of settings up to Andrew's 'effing tight' near the elbow. The upper arm (farm machinery torques) and shoulder (railway equipment)remain un-calibrated and Shipwright's Leg, as applied to 6 foot open enders is a sight to behold I'm reliably informed... Not so much foot pounds as foot pounding, whole body jumping etc. :D
1E75339 UberLynx D-Type; 1R27190 70 FHC; 1E78478; 2001 Vanden Plas
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