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Square Four Con rods
#809968 05/23/20 3:12 am
Joined: May 2009
Posts: 357
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I just had the timing side crankcase main bushes re-Babbitted and line bored and have started the rebuild of my 1958 Square Four. I replaced the big end bearing shells and have attached the con rods to the crankshaft but cannot find any printed material or info on the Dragonfly site that provides torque values. I realize that the nuts are castleated and take a cotter pin, but there must be a correct torque that should be applied first. Anybody have such data, please? Indeed, are there torque values available for the entire bike? They're probably somewhere obvious but I haven't found them.

In case anyone asks - yes, I did thoroughly clean out the crankshaft oil ways and have used liberal amounts of breaking in oil on all bushes and bearings.

Thanks in advance for any help.

Paul.


Paul

'74 Commando - Interstate
"74 Commando - Hi-Rider, possibly
'65 Atlas, mostly anyway
'15 R1200 GS Adv
'51 Vincent Rapide
'58 Ariel Square Four
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Re: Square Four Con rods
Paul Sammut #809987 05/23/20 9:36 am
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Got this when I did my mk1 think the bottom end is the same bear in mind its inch .

[Linked Image from i.ibb.co]

Last edited by ducati2242; 05/23/20 9:38 am.
Re: Square Four Con rods
Paul Sammut #809989 05/23/20 9:50 am
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This might also help .

[Linked Image from i.ibb.co]

Re: Square Four Con rods
Paul Sammut #810007 05/23/20 2:19 pm
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Posts: 357
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Thank you so much, Ducati 2242 - that is enormously helpful and kind. much appreciated.


Paul

'74 Commando - Interstate
"74 Commando - Hi-Rider, possibly
'65 Atlas, mostly anyway
'15 R1200 GS Adv
'51 Vincent Rapide
'58 Ariel Square Four

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