Removing CV's: I'm baffled!

[911hillclimber]

Not a Radical sorry, but hope someone can help me.

I am removing two old CV's off my March F2 rear driveshafts, Lobro type.
The centre 'star' that goes over the shaft spines simply will not come off the shaft/splines.

There must be some kind of clip inside the shaft/hub but even with a good hub puller on it will not come off. Free of the puller, the hub will freely move about 0.5mm but something is stopping it comimg off!

Any advice welcome.

Thanks, Graham.

[SportsLibre]

I think, if you clean up as best you can you will find a circlip sitting in a grove on the driveshaft stopping the removal.

Edited by SportsLibre on Wednesday 12th November 22:38

[NASA racer]

There IS a circlip in there...this thread has a photo of the clip...you pry the clip apart and the CV will come off the axle.
http://socalpeeps.yuku.com/reply/3225#reply-3225

[911hillclimber]

I swear I didn't see a clip!
But I'll take a closer look tonight. Thanks for the info and the pic.

Have anyone seen a CV with an internal 'C' ring? Such a method is used by Impreza's and the like.

Graham.

[911hillclimber]

Absolutly no external clips on either side:



Any ideas?

[splitpin]

Heat shrink fit?

[GreenV8S]

Is there even the slightest hint of movement between the CV and the shaft, or do they feel as if they have been welded together?

[minitici]

My FF1600 Lobro type shafts had a circlip on the outer end of the shaft and a disc spring washer on the inner end abuting a shoulder on the shaft.
You shafts certainly dont look like a clip is fitted on the outer end.
Try some heat and a lump hammer

[911hillclimber]

There is about 0.25mm movement by hand 'free' on the splines. WD 40 runs through the splines freely but the thing will not come off!
I've had a good hub puller on it and a sharp hammer blow(s) and nothing moves. Not a clip in sight, so it must have an internal C ring. The joints are no good to me so might have to nearly gring the hub off and crack the rest open!

Mad!

[GreenV8S]

How bizarre, but I can't see any other explanation.

[DarioT]

whilst not the same as yours, i had a similar thing happen on my SR3 rear drive shaft outboard end.

no matter what i tried i could not push this bloody thig apart. steeped it in WD40, left it under pressure from the 5 tone puller for a week but still no joy.

to it to radical to get it pressed out and they did suceed but, bu only after the end of the splined shaft broke.

it had been installed with a spring clip (same as would be used on the diff end) from an original build some time in the past.

all fixed now.

possibly thats what going on.

Dario

[911hillclimber]

I can see the same thing here. The March F2 shafts are gold dust, so as I do not need the small FF Lobro's I'll grind the inner hub to a whisker and snap it off. Maybe the other shaft will pop easy!

[GreenV8S]

Before taking a grinder to it you mighty like to make sure you can get your hands on the replacement. That would also enable you to confirm that the replacement does have the groove you assume is there. If it doesn't, you risk wrecking the one you already have for nothing.

[911hillclimber]

Fair point. Getting details on the fitment is proving quite tricky. Thanks for the advice though!

2 hours later and youv'e made me think harder.

If the March drive shafts are (I hope) 20mm or so too short, I can keep the current Lobro and make a stepped spacer to go from the 86mm to the 100mm drive flanges on the Porsche gearbox, so saving a lot of $$$ and some time.

Food for thought. Need to pop the engine back in then.

Edited by 911hillclimber on Friday 14th November 21:20

[SportsLibre]

911hillclimber said:

I can see the same thing here. The March F2 shafts are gold dust, so as I do not need the small FF Lobro's I'll grind the inner hub to a whisker and snap it off. Maybe the other shaft will pop easy!

Yes, Actual March F2 shafts may be gold dust,but it is relatively easy and cheaper to get "unbreakable" shafts made to the copy specs. Should you need them PM westgarage (minitici) for details.

Edited by SportsLibre on Friday 14th November 23:10

[stiglet]

SportsLibre said:

Actual March F2 shafts my be gold dust,but it is relativesly easier and cheaper to get net "unbreakable" shafts made to the copy secs.

Edited by SportsLibre? on Friday 14th November 21:23

[911hillclimber]

What sports lbre means I think is to have new shafts made for the outer CV's (which look weird to me) and have them cut for normal motorsport lightweight GKN CV's and to a length to suit the car. That is £200 each + £200 for the CV's.

I'm thinking that there may be a middle ground here:

If the shafts and existing CV's are 'short' to reach the box and give the full float for suspension travel, I can make a pcd adaptor plate for the 911 flanges (100mm and the current CV @ 86.)
Cost? about £50.

Graham

[911hillclimber]

Actually got both CV's off the shafts by applying the hub puller gently ans tapping the inner hub with a 'toffee' hammer. Both 'oozzzed off' gently....
There are indeed clips on the inside, just like it shows on the Radical spares parts site.

The saga continues!

The number of splines is 23 and the norm is 25!!

Need to find some 23 spline/ 100mm dia/44mm wide CV's now to fit the Porsche flanges, but I stand a good chance that I can use the March safts after all.

[911hillclimber]

All resolved due to the strangest discovery and sheer luck!