Honda-SOHC
SOHC.co.uk Forums => CB500/550 => Topic started by: alexdecker on May 03, 2022, 08:00:55 PM
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Hey all
Alright, so using a rotor puller to try and get the rotor off the crank of my cb550. The thing won’t budge. Applied force, and even bent the rotor puller handle a little. It’s not coming off. Is there a trick I’m missing here? Or is it good old heat again?
Almost couldn’t get the rotor puller out again though, because of the amount of force I had pulled it in with.
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I assume you have given it a tap with a lump hammer whilst the puller was under tension.
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Also grease/copperslip the puller threads as it will promote more leverage for the same torque.
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Also grease/lube on the contact point of puller.😉
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Are you using the proper puller or a generic 3 leged job,which never work
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I took 2 rotors off 2 cranks the other week so I could scrap the cranks as they were very rusty. Using the genuine Honda tool it took me less that 3 mins for each one and that included removing the bolt. No grease used, just threaded it in, tapped with a lead shot filled rubber hammer and they fell off, despite the rust.
Using the right tools makes the job so much easier and saves damaging anything. The genuine Honda tool looks like a cross, black with 4 different thread pitches on each arm so it fits multiple bikes. Not that dear to buy.
If you were close I’d pop round and remove it but of course your not, shame.
Watch you don’t lose the woodruff key when it finally comes off. Easy to do.
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Stop winding him up Ken, there is no key on the fours!
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Yes, I lost both the woodruff key and it’s slot.😀
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Tapped it. Greased it. Tapped it some again.
I am amazed how "lightly tapping" seems to be such an integral part of motor cycle maintenancene 😂
I am using this rotor puller tool I bought of CMS. I torqued it too much it would seem. I snapped my oil filter wrench (used to stop the crank from turning) and bent the handles a bit on the tool.
Any other ideas, other than a giant vice and more muscle?
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Alex, if you are splitting the motor, leave it on and tease it of with a block of wood and mallet later. Worked for me and no special tools required.
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The impact strike is better than tightening up the puller too much and not just on motorcycle cranks.
On the old A Series BMC engines flywheels could be hard work even using fancy hydraulic pullers. The strike with a lump hammer frightened them into letting go. (Yes they had a Woodruff key)
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Problem is that I have dismantled the entire engine, so its just the crank I am operating with. So I don't have the weight of the engine or bike to stand against the torque.
Should I just torque it and smack it hard as hell with the hammer?
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I simply undid the bolt, strategically placed a bit of 2x3 softwood inside the rotor and worked it around tapping firmly, but not violently….of it popped.
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Brilliant! I learned a long time ago it’s sometimes better to walk away and take stock, regroup rather than going for the explosives!😂
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You know Bryan I had to go and check the cranks I am scrapping as I have a VIVID memory of pulling woodruff keys out of the slots and it's a recent one.
I'm wondering now what the hell I was working on.
Getting old is starting to suck a little ;D ;D ;D
This is the one I use. I think I paid about £10 for it in the 80s.
https://www.ebay.co.uk/itm/293326225468?hash=item444b9b003c:g:sVMAAOxyJs5RZT7f
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I seem to recall using an M16 x 50mm fine thread bolt - https://www.spaldingfasteners.co.uk/m16-metric-fine-8-8-grade-high-tensile-zinc-hex-head-fully-threaded-set-screws/ (https://www.spaldingfasteners.co.uk/m16-metric-fine-8-8-grade-high-tensile-zinc-hex-head-fully-threaded-set-screws/) and an impact wrench, just seemed to fall off my 77 550K3 as soon as I pressed the trigger. This would work I imagine even with the crank out of the engine.
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It's off. Definitely didn't fall off at all. It took a big hammer and what some would call violence and everything on my work desk rattling off and falling to the floor.
But… it's off. I think that was the last thing that could be stuck on this damn thing (knock on wood).
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Congratulations Alex. Don’t be downhearted, regroup and crack on. You’ll feel a lot better once to start to rebuild.