Discussion
We have been trying to replace the half of the coupling on the Busa gearbox output shaft on an SR3. The other half of the coupling connects to the rest of the drive train via the plastic drive pins. Our problem is that we cannot undo the nut on the output shaft from the Busa gearbox despite using a variety of impact tools and heating the nut. Does anyone out there have any ideas or are able to actually take the nut off for us? We have just missed a round of the ROC sprint championship because of this problem and are currently making no progress. The transmission unit aft of the Busa engine/gearbox is out of the car to facilitate access to the nut, but access still isn't easy.
I look forward to hearing from the forum as we would really like to resolve this problem and move on.
I look forward to hearing from the forum as we would really like to resolve this problem and move on.
Hi Chris (& Tim)
Sorry to hear, Will told me you still had issues so couldn't run @ Goodwood yesterday.
Hopefully we'll hear soon from Simon T; what he doesn't know about pulling everything apart (and putting it back equally successfully!) on an SR3 almost certainly isn't worth knowing.
Failing that, give Radical a ring tomorrow and speak to Rob Wheldon, Derek White and/or Paul Widnall; maybe email and/or post up a photo of the conundrum part; a picture inevitably makes things clearer. Who knows, maybe RadicalTechnical will be looking in here sometime soon.
Good Luck Guys.
Sorry to hear, Will told me you still had issues so couldn't run @ Goodwood yesterday.
Hopefully we'll hear soon from Simon T; what he doesn't know about pulling everything apart (and putting it back equally successfully!) on an SR3 almost certainly isn't worth knowing.
Failing that, give Radical a ring tomorrow and speak to Rob Wheldon, Derek White and/or Paul Widnall; maybe email and/or post up a photo of the conundrum part; a picture inevitably makes things clearer. Who knows, maybe RadicalTechnical will be looking in here sometime soon.
Good Luck Guys.
Many thanks for that Kev. We have already been in touch with Radical and they have been quite helpful in telling us how to get the gear assembly out of the car and with torque setting and which Loctite to use (expensive wherever you buy it) when we put the nut and new coupling half back on. However all they said with regard to undoing the recalcitrant nut is to apply heat with a heat gun. We have tried that but no luck so far. The big question is do we have to take the engine out of the car in order to provide clearance for a really heavy duty pneumatic impact driver, ie 3/4 inch drive like they would use on lorries - would rather not if it can be done another way? Anyway, if you can help Simon T, I can bring the car over to you.
We are hoping to make the ROC sprint at Snetterton on the 29th May and also hopefully a track day there about a week earlier so Tim can learn the circuit, which he hasn't done before.
We are hoping to make the ROC sprint at Snetterton on the 29th May and also hopefully a track day there about a week earlier so Tim can learn the circuit, which he hasn't done before.
splitpin said:
Hi Chris (& Tim)
Sorry to hear, Will told me you still had issues so couldn't run @ Goodwood yesterday.
Hopefully we'll hear soon from Simon T; what he doesn't know about pulling everything apart (and putting it back equally successfully!) on an SR3 almost certainly isn't worth knowing.
Failing that, give Radical a ring tomorrow and speak to Rob Wheldon, Derek White and/or Paul Widnall; maybe email and/or post up a photo of the conundrum part; a picture inevitably makes things clearer. Who knows, maybe RadicalTechnical will be looking in here sometime soon.
Good Luck Guys.
Sorry to hear, Will told me you still had issues so couldn't run @ Goodwood yesterday.
Hopefully we'll hear soon from Simon T; what he doesn't know about pulling everything apart (and putting it back equally successfully!) on an SR3 almost certainly isn't worth knowing.
Failing that, give Radical a ring tomorrow and speak to Rob Wheldon, Derek White and/or Paul Widnall; maybe email and/or post up a photo of the conundrum part; a picture inevitably makes things clearer. Who knows, maybe RadicalTechnical will be looking in here sometime soon.
Good Luck Guys.
dsl2 said:
Not installed in an SR3 but on my PR6 holding the sprocket on, mine came off no problem with a very heavy duty 1/2in drive impact wrench?
We've tried 3 different 1/2" drive impact wrenches with increasing heaviness of duty so far! I think the next step might be a 3/4" or 1" drive wrench, but we're not sure if the socket will fit without cutting the drive cups off.How did you hold the sprocket still when you undid yours?
Simon T said:
Sounds like someone has locktite'd it on. warm on a gentle heat to gas mark nine then show it the sharp end of a 230ftlb rattle gun, It's going to come off if its going to come off
Failing that drop me a mail with a contact number
S
Many thanks for that Simon. We are going to have another go this weekend with a more powerful pneumatic rattle gun - this will be the 3rd we have tried. Radical/Powertec have been very helpful, sending us detailed instructions as to how to do it. It is just that they haven't worked so far. They do say, however, that the nut and splines should be Loctited when the coupling half is replaced. I have obtained some of the Loctite they recommend - can't remember the number off hand and it is in the workshop, but it was expensive and consists of the Loctite and an activator. I would guess that the reason the nut is reluctant to come off is because of the Loctite, where a lot of heat might be helpful. Will be in touch next week if we still haven't got it off by then.Failing that drop me a mail with a contact number
S
Edited by Simon T on Wednesday 28th April 19:52
C.
We got the nut off at last!!!
To quote Vivian from the Young Ones, it called for "a special blend of psychology and extreme violence".
Thanks to Simon T for suggesting drilling the nut to Chris. That's what worked in the end. The cush drive fell apart when we removed the nut so the crack went all the way through. It's possible the multitude of rattle guns we've used may have exacerbated it.
To quote Vivian from the Young Ones, it called for "a special blend of psychology and extreme violence".
Thanks to Simon T for suggesting drilling the nut to Chris. That's what worked in the end. The cush drive fell apart when we removed the nut so the crack went all the way through. It's possible the multitude of rattle guns we've used may have exacerbated it.
Great!
It certainly took the full fifteen rounds, but delighted you finally overcame
Take a well-deserved bow Mr T
Good to see that it's already been uploaded by Tim into "Handy Tips That Actually Work"; perhaps an alternative title for the 'Library' would be "A Compendium Of Amazing Trick Shots To Get You Out Of That Seemingly Impossible Snooker"
It certainly took the full fifteen rounds, but delighted you finally overcame
Take a well-deserved bow Mr T
Good to see that it's already been uploaded by Tim into "Handy Tips That Actually Work"; perhaps an alternative title for the 'Library' would be "A Compendium Of Amazing Trick Shots To Get You Out Of That Seemingly Impossible Snooker"
Edited by splitpin on Saturday 8th May 21:15
Gassing Station | Radical | Top of Page | What's New | My Stuff