[TR] [NET] TR3A Torque Spec?

Wed Jun 28 15:57:21 MDT 2017

I asked the same question some years ago and was never able to get an answer – so I too am interested.

Given the importance of this bolt, I have always torqued it just as tight as I can – with a wrench on the bolt and a big pipe wrench on the extension.  All my weight on them.

Andrew Uprichard

Jackson, MI

From: Triumphs [mailto:triumphs-bounces at autox.team.net] On Behalf Of David Friedlander
Sent: Wednesday, June 28, 2017 12:49 PM
To: richard langhoff
Cc: TR3 Triumphs; New England Triumphs
Subject: Re: [TR] [NET] TR3A Torque Spec?

Thank you Richard. But the bolt I'm inquiring about is the main bolt 

holding the fan (and the fan extension) to the crankshaft. It is a 6" 

long bolt with a 5/8-18 UNF thread for the last couple of inches.

This is Moss P/N 320-090...  Item 69 in the attached clip:

Does your manual specify a torque for this bolt?

Dave

'59 TR3A

On Wed, Jun 28, 2017 at 11:58 AM, richard langhoff <richardlanghoff28 at gmail.com> wrote:

David,

According to Triumph Owners Handbook of Maintenance and Repair, Floyd Clymer Publications, VelocePress, 2009, p. 316, the torque for "Fan Attachment," 5/16 inch U.N.F. Bolt is 16-18 lbs. ft.

I hope this is helpful.

Dick Langhoff

'58 TR-3A

S/N 30024L

On Wed, Jun 28, 2017 at 9:51 AM, David Friedlander via NET <net at newenglandtriumphs.org> wrote:

Hey all;

Can anyone tell me if there is a torque spec for the large bolt used to connect 

the fan to the end of the crankshaft (the bolt goes through the pulley hub and 

the fan extension) ? I didn't see a torque spec anywhere....

Thanks for any help.

Dave Friedlander

'59 TR3A

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