Replacing rear shock

[comradeiggy]

So today I got a rear shock off a katana 600 from crispy, and I am having problems pulling the old shock. I tried to pull it out from the bottom - won't fit. Pulled off airbox, tried pulling it out from the top - still won't come out. So I realized I need to take the knuckle out too. That's where I am having the problem. I can't get the bolt off that connects the knuckle to the dogbones - it's stuck on there good. I literally put close to 250 ft-lbs of torque on it - all that happened was that the wrench I had holding the nut on the other side snapped. Does this call for an impact wrench? Or will that even work, since I can easily turn the bolt when the nut on the other side is allowed to spin with it.

[Janx101]

wow .. i'm like the reference dude just for the moment .. not really ... just i got here 1st 

may i direct your attention to the video tutorial thread on this site!? .. then a quick look at the list and you can watch many helpful tips for your problem 

[jdoorn14]

Impact wrench might help, but I would hit it with some PB Blaster first.

[dougdoberman]

Mine, on a bike where every other bolt has been super easy to remove, took several long soaks in penetrating oil and several attempts with an air powered impact wrench before it finally broke free.

If you don't have access to an impact wrench, putting a punch (or screwdriver in a pinch) on the bolt and hitting that with a hammer as you try to turn it is a very very poor substitute that MAY work.

Also, you can try heating the nut with a torch with the goal of getting it to expand every so slightly and loosen its hold a bit.


Another option is bolting it back together and taking it over to a buddy who's got an impact wrench.  Or even a local shop.  Crack the thing loose there, tighten it back up, ride home & take it apart.

[BockinBboy]

+1 on the heat and furious pounding! 

All joking aside, some good penetrating lubrication time, then heat shortly followed by swift, controlled taps of a hammer on the end of a breaker bar would be the best home remedy for a stubborn nut.

Just be sure you allow some time between heating and lubrication so you don't light anything up!

- Bboy

[adidasguy]

Seafoam Deep Creep does not burn. Works as well as Blaster.

[comradeiggy]

Woop woop! Got it off this morning. Breaker bar + PB blaster + torch worked, but barely. There was no corrosion whatsoever. Whoever put that thing on there before just put it on WAY too tight.

[cbrfxr67]

http://www.pbtusa.com/pdfs/70865I.pdf

darn too late.  I'm always up for tool discussion.  Glad you got it off!

[Janx101]

glad it worked out ... but just had a random memory/thought...

imagine how frustrating it would be if ... the previous times you had attempted the nut that you were trying to tighten it against the last of the thread... instead of loosening it ...

hands up who's done this!? late at night .. when its a case of "just this last bit and i'll be happy" ... only to retreat away from the "bad" nut/bolt with the gleam of a berzerker in your eye? .. then come back some time later and look and think .. $h1t !!!!!!!!!!!

was changing a tyre on a 12tonne truck once .. 2am .. 300km from anywhere .. less than 5 degrees C .. forgot that the left side wheel nuts on that truck are opposite thread ... with my 120kg bouncing on the end of the cheater bar from the wheel brace ... fell off the bar and onto my back in a prickle bush a metre away ...

At Night on a Deserted Highway .. No One can Hear You SCREAM!!!!!!! 

[comradeiggy]

glad it worked out ... but just had a random memory/thought...

imagine how frustrating it would be if ... the previous times you had attempted the nut that you were trying to tighten it against the last of the thread... instead of loosening it ...

hands up who's done this!? late at night .. when its a case of "just this last bit and i'll be happy" ... only to retreat away from the "bad" nut/bolt with the gleam of a berzerker in your eye? .. then come back some time later and look and think .. $h1t !!!!!!!!!!!

was changing a tyre on a 12tonne truck once .. 2am .. 300km from anywhere .. less than 5 degrees C .. forgot that the left side wheel nuts on that truck are opposite thread ... with my 120kg bouncing on the end of the cheater bar from the wheel brace ... fell off the bar and onto my back in a prickle bush a metre away ...

At Night on a Deserted Highway .. No One can Hear You SCREAM!!!!!!! 

Yeah I've done that before, recently actually. I was cleaning a fan at work and there's this plastic thingie on the end that is threaded opposite from normal. Almost broke the damn thing before I realized what was wrong.