Levo Gen 2 Help needed, cannot get Praxxis crank off.

[Scoobaru]

So my drive side Praxxis crank won't loosen with my 8mm allen key and quite a lot of force. It lossened about 1 rotation then stopped. I added some oil to the outer nut / inner hex area but no difference. Has anyone got better ideas ?
Its a 2019 Levo Expert, std alloy cranks.

 

[RickBullotta]

It was tightened to 50Nm or so - you'll need a long handled 8mm or a socket drive 8mm on a larger socket wrench so you can get some serious leverage on it.

 

[Scoobaru]

I stood on the allen key and crank at opposing angles (after triple checking I was loosening) and no movement, I weigh about 100kg.
The other side came off ok using only my hands.

 

[Jersey Skier]

More leverage. Try sliding an old handlebar over the allen wrench.

Not carbon.

 

[Scoobaru]

Worried I might strip the threads of the motor spindle by using even more force, but doubt there is any better option.

 

[RebornRider]

Can you borrow an impact driver? The repeated hits might loosen the bolt with less torque than adding leverage to your allen wrench.

 

[KennyB]

You say the bolt turned, then stopped. So it's not the threads. Perhaps the splines are the problem and it might be worth getting some penetrating agent in to them. But, don't get any further inboard than the crank, so no skooshing away with an aerosol.

 

[Jersey Skier]

You say the bolt turned, then stopped. So it's not the threads. Perhaps the splines are the problem and it might be worth getting some penetrating agent in to them. But, don't get any further inboard than the crank, so no skooshing away with an aerosol.

It probably turned once then bottomed out on the self-extracting cover. Needs more force to push it off. Just don't mess up the 8mm hex or you'll really be stuck.

 

[Loe Rider]

Try a T bar on the hex driver so you can push and pull together to get a more even power distribution onto it. Extension bar on both sides for the win. 50nm is s scary torque on a bike.

As above, the initial turn is just the self extractor hitting the stop and is normal.

Your call on the impact driver but I wouldn't risk beating the drive shaft on my Levo motor. If you have an old motor the plastic sprag clutch housing is not very durable and has been known to fail with a pedal strike.

 

[ebikerider]

If it's gotten to the point of thinking something is going to break I would bring it to a specialized shop and let them break it for you.

 

[Jaspy]

I hate to state the obvious but are you turning it the right way ? Clock wise…

 

[Zimmerframe]

I hate to state the obvious but are you turning it the right way ? Clock wise…

Don't you mean anticlockwise .... ?

Unless clocks go the other way where you live...

 

[Jaspy]

Righty tighty … not always ?

 

[Jersey Skier]

Righty tighty … not always ?

View attachment 66214

That's for the pedal, not the crank bolt.

 

[KennyB]

OP has a Levo 2019 , crank bolts loosen anti-clockwise and he has already loosened it.

 

[James_C]

mine always seems to spin round once then tighten up too. Just have to push past it. I put another bar over the top and a leather glove on which helps.

ideally a long torque wrench and a hex socket would be ideal. You'll need that to do it back up anyway!

 

[wrayb]

And don't forget to use anti‑seize when reinstalling.

 

[NoPro]

50nm is s scary torque on a bike.

It is indeed and I'm not sure it sould be that much the workshop manual states on several pages that it sould be 40nm, my Manual also says 40nm the new Version I downloaded says 50nm. My second motor was replaced because the crank fell of and I got this as a souvenir (lucky my lbs mounted the cranks to what ever spec they thought was right, watched them using a torque wrench). I stick with 40nm...

Workshop Manual:

My Manual:

PDF I downloaded:

maybe @Specialized Rider Care could clarify to avoid damage

 

[Scoobaru]

Finished. So I went to a bike shop and they had a very long sturdy torque wrench that worked. Threads were ok, thank F. Installed my new Hope EEB cranks ok.

Moral of the story 1, get some grease inbetween the bolt and capture nut on the cranks ASAP (Hope visibly had some from new).
2. Praxxis are crap, this is the second arm I have bent, first when the bike tipped over with both tyres on the ground (front washed out on mud), second on a small 3-4ft drop from grass to grass, not exactly Rampage !

Thanks for everyones help.