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Author Topic: Removing clutch actuating arm from spline  (Read 182 times)
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mangocrazy
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« on: May 26, 2021, 03:59:53 PM »

When I bought the gearbox that Day & White subsequently rebuilt/refurbished for me, I failed to notice that it was missing the clutch release bearing arm/levers and the external actuating lever. As a result I've been trying to liberate those components from the gearbox I removed from my Beta Spider engine prior to stripping it.

The circlip notionally holding the two parts together came off easily enough, but trying to seperate the two splined parts has proved an entirely tougher proposition. I've repeatedly doused it in Plus-Gas and tried various threatening moves with a lump hammer, but it hasn't budged. The part inside the bell housing has come out of its locating hole and is now waggling about freely, which doesn't help. Is there a suitable puller that could help me?

Also, is the nylon top hat sleeve that acts as a bearing between shaft and housing still available? Mine has seen better days. I'm thinking of giving the splined area some serious heat with a view to seperating the two halves, and that will probably finish it off.
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1980 Lancia Beta Spider 2000 (S2FL)
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rossocorsa
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« Reply #1 on: May 26, 2021, 04:10:21 PM »

I can't help really as mine just came off without any problems I just lifted it off by hand.
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SanRemo78
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« Reply #2 on: May 26, 2021, 04:55:27 PM »

Two or three legged puller perhaps? That might work if there's enough room to get the puller teeth underneath the arm. You may want to centre punch the shaft and drill a locating point so it's secure first.

https://www.ebay.co.uk/itm/334014872144?hash=item4dc4d67a50:g:wFgAAOSw9RBgrfbe

If that fails my next step would be to see if any local engineering shops have a suitable hydraulic press to pop it off.

If that fails then I'd try heat, I suspect that'll kill the nylon bush pretty quickly. Maybe invest in an induction heater to localise it a bit and try to protect the nylon with a shield?

https://www.ebay.co.uk/itm/324643170235?hash=item4b963da7bb:g:BWUAAOSw7S9grO2n

And if that doesn't work then it's either time to give up or resort to violence with an angle grinder with a diamond cutter attached in an attempt to cut the arm down to the splines and a cold chisel to spread it slightly. If you go that way then please make sure everything is securely nailed down, wear proper eye protection too and choose where to make the cut carefully - I'd go for a point near the base of the lever to the left of the lever when viewed from above. That way you might be able to re-use the arm without having it welded up again, the load from the cable will try to close the cut up under operation, if it were the other side of the arm it's going to try to open it.

Guy
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SanRemo78
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« Reply #3 on: May 26, 2021, 05:01:36 PM »

Is the old gearbox/bellhousing scrap? Cutting the bell housing up with a reciprocating saw or a drill (join the dots with a chisel) would release the components and allow you to save the nylon bush? This would free the bits you need and allow you to get them into a hydraulic press.

Or a parts wanted advert?

I think that's all I've got for now!

Guy
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Hawk HF3000 - Square Arch Stratos Replica - owned since 1988.
Hawk HF 3000 - Round Arch Stratos Replica - Under construction.
Alfa Romeo 159 T1 2.4 Q4 Sportwagon - Believed one of 4 in UK.
SanRemo78
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« Reply #4 on: May 26, 2021, 05:18:46 PM »

And if you do end up destroying the bush..

https://www.ebay.com/itm/113754335250?hash=item1a7c496812:g:zvIAAOSwLvFc4MVe
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Hawk HF3000 - Square Arch Stratos Replica - owned since 1988.
Hawk HF 3000 - Round Arch Stratos Replica - Under construction.
Alfa Romeo 159 T1 2.4 Q4 Sportwagon - Believed one of 4 in UK.
mangocrazy
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« Reply #5 on: May 26, 2021, 07:32:29 PM »

Hi Guy,

Yes, the more I think about it a 2 or 3 legged puller should do the job. There's about 12mm of clearance behind the arm so should have enough room. And the shaft has already been centre-popped so that helps as well.

Good spot on the bush all the way from the USA, even if the part number he's quoted is not one that seems to match. Betaboyz do list these, but as out of stock, so I do need to cast my net wider. It's a bit infuriating, as if I had even a hobby lathe I could knock something like this up in a few minutes. One day...

Thanks for all the suggestions - much appreciated...

Graham
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1980 Lancia Beta Spider 2000 (S2FL)
2002 VW Transporter T4
2017 KTM Duke 690R
2008 Aprilia SL1000 Falco
1992 Ducati 888 SP3
1988 Honda VFR750F
1980 Yamaha RD350LC
SanRemo78
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« Reply #6 on: May 26, 2021, 07:53:12 PM »

It's not the 12mm step that's critical in choosing a 3 legged puller Graham, it's if the 3 legs will clamp together under the step without interfering with each other. If the do then you'll be pulling on potentially a smaller area that you might with a 2 legged one if you see what I mean.
I don't know where you are but if it's anywhere near Liverpool (L30 5RD) you're more than welcome to pop in and try my pullers - I think I've got two 3 legged ones of different sizes.
Chances are that it'll pull straight off if it's been soaked in plugs and suffered a beating!
Guy
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Hawk HF3000 - Square Arch Stratos Replica - owned since 1988.
Hawk HF 3000 - Round Arch Stratos Replica - Under construction.
Alfa Romeo 159 T1 2.4 Q4 Sportwagon - Believed one of 4 in UK.
mangocrazy
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« Reply #7 on: May 26, 2021, 08:25:52 PM »

Yes, I get what you're saying. I've bought a 3" 3-legged puller, so hopefully I can get enough pressure on the arm with that to do the job. I'll be introducing it to the MAPP gas torch before using the puller, just to encourage it a little more. As with most things of this nature, it's a case of applying the right amount of force at the right point. Hopefully what I can bring to bear will be sufficient.

Thanks for the offer, it's much appreciated. Unfortunately I'm in Sheffield, so Liverpool is a bit of a trek for a puller...  Grin
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1980 Lancia Beta Spider 2000 (S2FL)
2002 VW Transporter T4
2017 KTM Duke 690R
2008 Aprilia SL1000 Falco
1992 Ducati 888 SP3
1988 Honda VFR750F
1980 Yamaha RD350LC
peteracs
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« Reply #8 on: May 26, 2021, 08:42:32 PM »

Hi Graham

I should have some spares of these, so if you need anything after your efforts, let me know.

Peter
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mangocrazy
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« Reply #9 on: May 26, 2021, 09:44:00 PM »

Hi Peter,

Thanks for that. My next step would have been a 'parts wanted' call. I'll see how it all goes, but I may well need to take you up on your kind offer. It all depends on the state of parts if and when I can get them disassembled and inspected.

Graham
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1980 Lancia Beta Spider 2000 (S2FL)
2002 VW Transporter T4
2017 KTM Duke 690R
2008 Aprilia SL1000 Falco
1992 Ducati 888 SP3
1988 Honda VFR750F
1980 Yamaha RD350LC
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