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Hub nut torque setting
Phil_1471 - 3/3/16 at 10:39 PM

Evening all,
Anybody give me a rough idea of torque on rear hub nuts for a Riot? I think they are xr2i front hubs. Have attached a pick FYI
They are tapered roller bearings, so I assumed just nip them up....??
Thanks
Phil

adithorp - 3/3/16 at 10:56 PM

They go up tight. They are cartridge type taper bearings; The inner races are machined to come together when done up with just the right amount of pre-load. From memory the nuts done to around 150lbft.

Phil_1471 - 4/3/16 at 07:02 AM

Brilliant, nipping didn't seam right. Thanks

Any advance on 150lbft...?

Charlie_Zetec - 4/3/16 at 10:35 AM

Slightly off-topic, but they're not stainless bolts holding the upper ball joint onto the wishbone, are they (just look quite shiny, but could be BZP items)? Only for such a stress-related part, I'd be using minimum 8.8 but preferably 12.9 grade bolts! Apologies if this is the case, but it just jumped out at me when I saw the pic....

adithorp - 4/3/16 at 10:36 AM

Auto data says 205-235Nm.

To be honest we just bang them up with the air gun.

Phil_1471 - 4/3/16 at 03:12 PM

Thanks for the exact torques, I will do them RFT!
Yes they are A4 stainless bolts, not had any issues with them, I think good upto 800nm and its no like they are hanging just on the bolt as its a surface friction load too...?!! - have you ever had one snap?

Charlie_Zetec - 4/3/16 at 05:26 PM

quote:
Originally posted by Phil_1471
Thanks for the exact torques, I will do them RFT!
Yes they are A4 stainless bolts, not had any issues with them, I think good upto 800nm and its no like they are hanging just on the bolt as its a surface friction load too...?!! - have you ever had one snap?


Please don't think I was criticising, just something that jumped out at me! I'd personally still use a 12.9 bolt, but A4 would suffice - just seen a few people on here (but mainly the LandRover forums) that have used A2 bolts in rather important areas because they though it'd be better that steel bolts as they wouldn't rust. And in those instances, yes, I have seen some quite catastrophic failures! Again, I know a 7-car weighs in at around 1/3 of a Defender, but just thought I'd ask to be on the safe side.

Phil_1471 - 4/3/16 at 06:54 PM

It's a fair point tbh, I'm probably going to swap to 12.9's at some point and they happen to be black too, bonus!

Grimsdale - 9/3/16 at 01:08 PM

the a2/a4-70 bolts have a yield strength only about 2/3rds of an 8.8 bolt and as such are much more susceptible to fatigue. the a2/a4-80 grades are similar to a 8.8.