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Removing rear hub nuts (de Dion)


bxhunt

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Has anybody got any tips for removing the rear hub nuts please?  I have tried the brake on technique but they are so tight that I have broken the wrench - certainly well over 200 lb/ft and I don't want to have to resort to the angle grinder!

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Depending on the age of your car first thing on the LHS is to remember that it has left hand thread. This does as far as I know not apply to the most recent cars and I have no clue when it changed.

There may be something about having different colour "nylon" in the nyloc nuts

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It’s a while since I last did this but I recall I used my Britool breaker bar, eighteen inches long, 1/2” drive, with an adapter to a 3/4” drive hex, not bi-hexagon, impact grade socket.  Supported the hub on an axle stand.  Stopped it turning with a one metre or so steel bar bought from B&Q hardware section.  Fixed bar to hub having drilled two holes in it spaced to fit over two of the wheel studs, other end resting on the floor.  As mentioned above you must ensure you respect the handedness of the nuts.  I remember that I expected it to be tricky and half expected I might snap the adapter at the torque level required but in practice it was no problem.

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Thanks all.

It was the 1/2" breaker bar I broke!  Now purchased a 3/4" breaker bar 27" long.  I had tried the steel bar trick to stop it turning but mine was too short - all it did was lift the car - so now I'll get a longer one.  Good idea to support the hub.  I had checked and the L/H side is definitely a left hand thread.

Once again, thanks for the ideas.

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I used a 24" breaker bar to crack my nuts loose, with the car in gear, handbrake applied, and a block of wood acting against the tyre, came undone no problem. My 1/2" torque wrench is only 20" long (approx), but tightens to the correct 270nm with ease.

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Pretty similar to the above except chocks front and back of rear wheel and in gear. With the Caterham 8-spoke wheels if you remove the centre cap there is room for the 41mm socket to fit through the wheel so the nuts can be loosened whilst the car is on the ground.

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As Chris suggests above for the wheels and using the foot brake, it’s no problem with a breaker bar. Otherwise see if you can borrow a wheel nut gun. The impact motion managed to do mine whilst the car was on axle stands

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200lb is not that huge. It is roughly the equivalent of a 14 stone man standing on a bar a foot from the socket. The nuts may tighten a bit in use although it is possible that lots of wheel spinning (e.g. dragracing, doughnuts) could have a larger tightening effect. If both nuts are very tight then it is likely that whoever put them on weighs a lot more than 14 stone and used threadlock cement.There must be a point at which the thread is damaged through overtightening.

Right (off)side anticlockwise. Left (near)side clockwise.

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  • 3 weeks later...

Eventually I did it with a length of steel bar with holes for the studs.  It took over 300lb to do it - whoever tightened it didn't know his own strength.  Tightening at only 200lbs was a doddle!

Thanks all.

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  • 4 years later...

Greetings,

I'm just about to remove the Sierra Diff from my Caterham and if I correctly understand this conversation the Right Hand nut is removed by turning anti-clockwise and the Left Hand Nut is removed by turning clockwise? The torque specification is 200 FT Pounds?

Thanks!

MAX

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Hi Max, as well as what 7WotW says, you should only need to remove the driveshaft on one side together with the 'A' Frame (i have done this a couple of times with my BMW diff, once with the cradle, once without). After moving the brake caliper out of the way and the single driveshaft (including disc, hub & ear) is removed, the diff is lowered a bit to clear the mounts, then it can be moved sideways a bit to release the driveshaft that is staying in place, before the diff is fully lowered out.

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  • 3 weeks later...

I did the cv boots on my daughters Punto the other day.

From the "top tips" in the haynes manual

I made a tool to jam the hub, like the wooden tool above  but from some thick steel strip. Around 800mm long. An additional 200mm length is fastened with a bolt. The pivot point is 200mm back from the end of the 800mm length. The result is a bar with an adjustable V at the end. Fasten the ends on 2 opposite studs and fit the nuts. Works for any PCD so useful for many applications 

 

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