bigandy
|
 posted on 11/12/04 at 10:46 PM |
|
|
Sierra Hub Nut Torque?
Evening All!
I've just been putting new wheel bearings in a couple of Sierra hubs for my Sylva, and I was wondering if anyone had a sierra haynes book of
lies to hand? I would be most grateful if someone could tell me what the front hub nuts should be torqued up to?
I've just put most of my weight (all 20 stone of it!) on a 55cm bar, so I am hoping that will suffice.
Cheers for the help folks!
Andy
Dammit! Too many decisions....
|
|
|
|
|
givemethebighammer
|
| posted on 11/12/04 at 10:53 PM |
|
|
Haynes says:
Hub nuts:
Saloon, Hatchback and Estate models 310 to 350Nm / 229 to 258 lbf ft
knew the rears were tight seems fronts are the same
ref:
Haynes Sierra, Chaper 11, page 2
|
|
|
bigandy
|
| posted on 11/12/04 at 11:11 PM |
|
|
Brilliant, cheers.
Doing a bit of maths then, I used a 55cm bar, say 50 cm to make it easier! I am about 120 kilos ish, so say I leant on the bar with about 75kilos of
weight, thats 750Newtons.
Divide 750 by 0.5, and that is about 375Nm. take of a few for good measure and that should do the trick nicely I reckon!
Thanks for the reference!
Andy
Dammit! Too many decisions....
|
|
|
Mark Allanson
|
| posted on 12/12/04 at 12:02 AM |
|
|
Saloon, Hatchback and Estate models 310 to 350Nm / 229 to 258 lbf ft
This generally translates to ' As tight as you can get it without stripping the threads '
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
|
|
|
wilkingj
|
 posted on 12/12/04 at 07:42 AM |
|
|
Make sure you have them on the correct sides of the vehicle!!!!!
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
|
|
|
bigandy
|
| posted on 12/12/04 at 09:47 AM |
|
|
On the correct sides? eh? Please forgive my ignorance, but on the hubs I have, there was only one type of thread, and that is a left hand one. And
they both came from the same car, I'm certain of that.
Is there impending doom if I use these hubs now? both with left hand threads? On both sides of the car?
Cheers for the help folks
Andy
Dammit! Too many decisions....
|
|
|
bob
|
| posted on 12/12/04 at 10:54 AM |
|
|
GULP!!!!!!  
My sierra front hubs are both right hand threads,my rears have one left hand on the n/s and right hand on the o/s.
|
|
|
Peteff
|
| posted on 12/12/04 at 11:28 AM |
|
|
Swap him one then Bob.
We did them on the nephew's Sierra and the near side was left hand thread on front and rear. Also when we tried to tighten them to the book spec
on the front the wheels wouldn't go round . Ended up using the old tighten till they bind and then release one flat method on the front. They
seem o.k. so far.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
|
|
|
bigandy
|
| posted on 12/12/04 at 11:47 AM |
|
|
Well, I've just had a word with a mate who did his apprenticeship with a ford service center (or something) and now works for Jaguar, and he
reckons that when Ford were a bit short of parts, they tended to "use what they had to hand!"
Which is a bit worrying! Although, it could explain both threads being left handed.
By the looks of the parts before I stripped them down and had them de-rusted and powder coated, they had been on the sierra for bloody ages. So if
there were no problems there, then I don't see any problems using them on my car!
I guess the different threads have something to do with the rotation of the wheel right? whic in itself cannot be that much of an issue, because the
car wheels don't always go forwards do they? They reverse sometimes. And when I did a reversing round campus race in my mini at University,
they went a bit quicker than normal too, all without problems!
I'm a bit confused now though, regarding whether two left hand threads are okay to use on the road?
Cheers
Andy
Dammit! Too many decisions....
|
|
|
indykid
|
| posted on 12/12/04 at 09:33 PM |
|
|
the hub shafts have splined thrust washers, so no rotation to free the nut should get to it, regardless of which side of the car it is on.
i torqued mine to 320 Nm using a hooj torque wrench as that was all i could muster in a horizontal wise, pushing off another bench.
tom
|
|
|
wilkingj
|
| posted on 12/12/04 at 09:48 PM |
|
|
Yes, its the wheel rotation. That does it.
After having a wheel come off my 18 month old caravan, I get a bit tetchy about wheels and tight nuts!. (it did £3.5K damage to a £7k van, and that
was 12 years ago, It was nearly a write off.
It's usually the nearside wheel that comes off. Hence Ford putting a left hand thread on the nearside.
Mine are nyloc nuts. Did you throw them away and buy two new ones?.
I would not use a Nyloc nut twice on something like a wheel bearing / rotating shaft.
Its like not using a split pin twice. Well certainly not on "Mission Critical" items like brakes and steering.
If in doubt then connsult the manual or a qualified mechanic.
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
|
|
|
bigandy
|
| posted on 13/12/04 at 09:30 AM |
|
|
I thought that the splined washers had a purpose other than from stopping the nuts rubbing directly on the inner bearing races. I guess not only does
it perform "washer" function, it must also help isolate the hubnut from any "undoing" forces acting on it in use.
When I rebuilt the hubs I used new bearings that came in a kit from the motor factors. Contained within these kits were new hubnuts, so I used the
left handed threaded ones of those, so the nyloc bits should be okay, as these are new.
I'm still trying to figure out how it is possible for a wheel nut like this to undo itself due to the rotation of the wheel! My feeble brain
cannot work it out at this time in the morning!
Cheers
Andy
[Edited on 13/12/04 by bigandy]
Dammit! Too many decisions....
|
|
|
