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Post by magoconnor on Apr 16, 2019 17:12:18 GMT -5
Hello.
So I have just installed a new crankshaft, not because of the old broke, more as an upgrade.
I have always being using a "normal" battery powered impact wrench, on both the variator and the clutch bolt.
I have never experienced any problems other than the bolts wear out.
Being its brand new, I dont wanna knock it out of alignment or hurt the bearings (too much).
Am I good still using the impact, or have I just been lucky so far? And should make some sorta holding tool?
Cheers Mag.
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Post by jeff84 on Apr 16, 2019 17:32:42 GMT -5
i used to do that and still do on the clutch. but ive managed to strip the threads on two different cranks so I bought a variator holding tool.
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Post by magoconnor on Apr 17, 2019 9:11:26 GMT -5
Okay, did you every experience some excessive shaking?
My only concern is really just knocking it out of alignment.
I dont think my impact is strong enough to strip the threads, only the bolts.
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Post by tocoo on Apr 18, 2019 0:25:02 GMT -5
what I do is screwing by hands, then lock with the impact driver
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Post by magoconnor on Apr 18, 2019 9:58:35 GMT -5
That is also what I tend to do.
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Post by KSR Moto on Apr 18, 2019 11:34:53 GMT -5
Bad quality sockets tend to round the bolts
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Post by jeff84 on Apr 18, 2019 15:37:31 GMT -5
never ant shaking or anything, the nut just got tight then loose again spinning freely on the shaft. I ended up having to rethread the crank and use a smaller nut. if it happens again I would probably have to replace the crank
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Post by 90GTVert on Apr 19, 2019 4:43:49 GMT -5
I use a pneumatic impact, but I use a torque stick with it now. For a while after I started working on scoots I just used the impact, but I stripped threads on more than one occasion. Haven't knocked any cranks out of true that I'm aware of. The most technically correct way to install nuts on the crank would be a holding tool and a torque wrench.
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Post by GrumpyUnk on Apr 24, 2019 9:54:58 GMT -5
The above advice about a holding device and a torque wrench are the best. Given the labor and time it takes to replace a crankshaft or get it re-threaded, taking care to not mess up the threads makes good sense.
If you are cheap, you can 'jam' the piston against some rope threaded into the spark plug opening to prevent the crankshaft from turning. Remember to leave a 'tail'.
I can see using an impact to remove the nuts on clutch or variator, but tightening should be done with a torque wrench or torque limiting device, such as a 'torque stick'. I have not learned to trust them... maybe some day.
When forced, I will use a box/open wrench to tighten the nuts, clamping the clutch in place with the rear brake(not so effectively) and holding the variator as best I can. I have used a screwdriver between variator teeth to improve my 'holding' capability. Not prime, but workable. I did have a clutch bell work its way loose once, so I know it's not perfect. I now have a holding tool direct from Shenzen, @ about $13 delivered. It readily allows removal and replacement without difficulty. The little bolt-on gear thing to hold the variator is overpriced, but I may have to break down and buy one. Or make a 'jamming' plate I can bolt in place.
tom
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