JohnTB Posted January 25, 2019 Report Share Posted January 25, 2019 Can anyone please tell me the torque setting for the large bolt that secures the fan extension to the front of the crankshaft. It's 1 1/8" AF ? Can't find it listed in the Brown Book but it can be seen at 12.65.01 as '9' Ta. Quote Link to post Share on other sites
sheldricka Posted January 25, 2019 Report Share Posted January 25, 2019 90lbs torque Quote Link to post Share on other sites
Motorsport Mickey Posted January 25, 2019 Report Share Posted January 25, 2019 (edited) Same size as my Stag and that gets set at 120 lbs ft. ( I think 5/8 UNF threads). It isn't shown on the 4 cylinder TRs either and I set them at 120 also when I rebuild one. Quite common to find front pulleys ruined where the woodruff key has "chavelled" another slot maybe 4 or 5mm wide alongside the original in the pulley..., not on mine they don't. Mick Richards Edited January 25, 2019 by Motorsport Mickey Quote Link to post Share on other sites
RogerH Posted January 25, 2019 Report Share Posted January 25, 2019 I think it needs to be a a high torque level as there is no locking device (spring washer etc) and the clockwise turning engine will try to undo it. Roger Quote Link to post Share on other sites
SeanF Posted January 25, 2019 Report Share Posted January 25, 2019 I set mine to 90 ft lbs based on advice received here. Quote Link to post Share on other sites
JohnTB Posted January 25, 2019 Author Report Share Posted January 25, 2019 Thanks Gent's I'll set to 90ftIbs then, with a little Locktite I think. Quote Link to post Share on other sites
Motorsport Mickey Posted January 25, 2019 Report Share Posted January 25, 2019 NO LOCTITE ! you might want to get it off again...sometime. Mick Richards Quote Link to post Share on other sites
Mike C Posted January 25, 2019 Report Share Posted January 25, 2019 Blue loctite Quote Link to post Share on other sites
Z320 Posted January 26, 2019 Report Share Posted January 26, 2019 #242 Quote Link to post Share on other sites
Waldi Posted January 26, 2019 Report Share Posted January 26, 2019 Mick’s advice for a bit higher torque makes sense. You then compress the pully flange harder on the sleeve and crack shaft boss, so there is less risk of relative movement. Once the bolt is not fully tight, the key will be “attacked”. I installed mine first without the pulley to make sure in went in easily, after using a tap in the hole to clean all debris; if you don’t, you may think you secure the pulley but you are not. Waldi Quote Link to post Share on other sites
Motorsport Mickey Posted January 26, 2019 Report Share Posted January 26, 2019 To help owners who don't have an engineering background the majority of bolts and fastenings on Triumph offerings will be Grade 5, and on a 5/8th UNF thread dog bolt that's good for 150 lbs ft Torque ! I feel a bit of a wimp only using 120 big ones ! Mick Richards Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.