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PostPosted: Mon Aug 07, 2017 8:42 pm 
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Hi,

Today I was going to remove the tyres and also put numbers at both ends of the spokes (at the hubs and rims) for later be able to mount the new black spokes at the new rims easily. I also want to get the hubs out for polishing.

No problem adding the numbers and taking many photos of the 4 faces of the wheels to remember the position, HOWEVER I had problems getting the tyres out of the rims, actually I quit without success.
In the last two photos you can see the tools I have for it. Using the same tools I have no problem removing the tyres of my other bikes, however the Scoiattolo is getting much more difficult.

Should I get at least one or two more of the long metal bar to be able to get it removed? as you can see I only have one long, the others three are small.

Any advise to be able to get these thick tyres out of the rim?

Cheers

Attachment:
Numbers-Rim-&-Spokes-Moto-Rumi-Scoiattolo_01.jpg
Numbers-Rim-&-Spokes-Moto-Rumi-Scoiattolo_01.jpg [ 103.48 KiB | Viewed 136 times ]

Attachment:
Numbers-Rim-&-Spokes-Moto-Rumi-Scoiattolo_02.jpg
Numbers-Rim-&-Spokes-Moto-Rumi-Scoiattolo_02.jpg [ 108.27 KiB | Viewed 136 times ]

Attachment:
Numbers-Rim-&-Spokes-Moto-Rumi-Scoiattolo_03.jpg
Numbers-Rim-&-Spokes-Moto-Rumi-Scoiattolo_03.jpg [ 115.96 KiB | Viewed 136 times ]

Attachment:
Tools-remove-tyre-wheel-01.jpg
Tools-remove-tyre-wheel-01.jpg [ 64.16 KiB | Viewed 136 times ]

Attachment:
Tools-remove-tyre-wheel-02.jpg
Tools-remove-tyre-wheel-02.jpg [ 68.28 KiB | Viewed 136 times ]

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PostPosted: Tue Aug 08, 2017 3:17 pm 
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Location: Sweden
Hugo, it sounds like age has hardened the tire to the point where all the elasticity in the rubber is gone. I would try to heat the tire with a heat gun (carefully!) or by soaking a section of it in hot water and then try with the pry bars again. It might be necessary to use three or four pry bars to get the edge of the tire across the rim.

The easiest would probably be to take the wheel to the nearest tire service place and let them use their big tire removal tools to take it off.


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PostPosted: Tue Aug 08, 2017 3:33 pm 
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Location: Sweden
Oops, I just looked at the picture of the tire and it looks new! So forget what I said about trying to soften it.
Just more and bigger pry bars - or a visit to the tire shop should do it.


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PostPosted: Tue Aug 08, 2017 7:34 pm 
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lars if your cylinders are good and you pistons are good just glaze break or hone cylinder and fit new rings,if pistons only required buy larger size and regrind or machine to size and file rings to correct ring gap.


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PostPosted: Tue Aug 08, 2017 7:45 pm 
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hugo make sure the tyre is of both sides of rim,press tyre down into bottom of rim opposite to where you need to remove tyre a small amount of soapy water on tyre to lubricate the edge ,take small bites about 3 inches apart around edge using 3 tyre leavers,as tyre comes of hold2 down move third one across to take next part of,hope this helps,


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PostPosted: Wed Aug 09, 2017 10:54 am 
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Thank you Lars and Arthur for the advises, as soon as I have time I will put them in practice :D

Here some photos of some progress. The leg shield need some welding because previous owner felt of the bike and some aluminium is gone. I do not have a good known aluminium welder in Amsterdam, but Rudolf has a good one close by, so he kept the parts there and prepared (removing the paint) for welding. Thanks Rudolf for this!!

Attachment:
Moto-Rumi-Scoiattolo-Leg-Shields-01.jpg
Moto-Rumi-Scoiattolo-Leg-Shields-01.jpg [ 42.35 KiB | Viewed 111 times ]

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Moto-Rumi-Scoiattolo-Leg-Shields-02.jpg
Moto-Rumi-Scoiattolo-Leg-Shields-02.jpg [ 58.37 KiB | Viewed 111 times ]

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Moto-Rumi-Scoiattolo-Leg-Shields-03.jpg
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Attachment:
Moto-Rumi-Scoiattolo-Leg-Shields-04.jpg
Moto-Rumi-Scoiattolo-Leg-Shields-04.jpg [ 46.72 KiB | Viewed 111 times ]

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PostPosted: Wed Aug 09, 2017 8:29 pm 
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Thanks for all the advises, the tyres are out of the rims now.

Attachment:
Moto-Rumi-wheels-tyres-out-of-rims.jpg
Moto-Rumi-wheels-tyres-out-of-rims.jpg [ 105.39 KiB | Viewed 103 times ]

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PostPosted: Thu Aug 10, 2017 9:03 pm 
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Hi,

After the tedious job of removing all the spokes, finally the hubs are free. Yes, I know I could just cut the old spokes ending very fast, but I rather removing the nuts damaging the less as possible even if those spokes are probably useless.

More soon.

Attachment:
Moto-Rumi-Scoiattolo-1955-Hubs.jpg
Moto-Rumi-Scoiattolo-1955-Hubs.jpg [ 84.93 KiB | Viewed 95 times ]

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PostPosted: Tue Aug 15, 2017 6:35 pm 
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Hi,

I want to remove the yellow highlighted parts before polishing the hubs and replace the bearings to new once. Before I use "brute force" on them, can anybody guide me to know the correct way to remove all those parts? Better ask than sorry.

Thanks in advance :)

Attachment:
Moto-Rumi-Scoiattolo-front-hub-parts.jpg
Moto-Rumi-Scoiattolo-front-hub-parts.jpg [ 52.34 KiB | Viewed 59 times ]

Attachment:
Moto-Rumi-Scoiattolo-rear-hub-parts.jpg
Moto-Rumi-Scoiattolo-rear-hub-parts.jpg [ 83.39 KiB | Viewed 59 times ]

Attachment:
Moto-Rumi-Scoiattolo-wheel-hubs-01.jpg
Moto-Rumi-Scoiattolo-wheel-hubs-01.jpg [ 74.34 KiB | Viewed 59 times ]

Attachment:
Moto-Rumi-Scoiattolo-wheel-hubs-02.jpg
Moto-Rumi-Scoiattolo-wheel-hubs-02.jpg [ 78.74 KiB | Viewed 59 times ]

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PostPosted: Tue Aug 15, 2017 8:39 pm 
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hugo looks like threaded locking ring,unscrew rings and then press out bearings drift out.


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PostPosted: Tue Aug 15, 2017 8:42 pm 
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hugo looking again should be able to use centre bush to press out bearings once locking rings undone.


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PostPosted: Tue Aug 15, 2017 9:19 pm 
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Hi Arthur,

I do not know if they are threaded locking ring, but in case you are right, they are completely flat on top. How could they be untreated?

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PostPosted: Tue Aug 15, 2017 9:43 pm 
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Hugo, just be careful to hit the sleeve with a wooden backing and everything will fall out.


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PostPosted: Tue Aug 15, 2017 9:49 pm 
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Exactly the same as with the bicarburatore.


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PostPosted: Wed Aug 16, 2017 7:10 am 
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As usual rudolf is correct, the parts Arthur refers to as threaded locking rings are in fact alloy retaining plates for the felt grease seals. these are easily damaged, I would replace with sealed bearings and use the alloy retaining plates as spacers wether they are damaged or not, Graham.


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PostPosted: Wed Aug 16, 2017 9:09 am 
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Thanks Rudolf and Graham,

Following Rudolf advise I managed to dismantle the rear wheel hub as you can see at the photo, however the front one is getting difficult. I am hitting but nothing move at all. I am afraid of hit too much bending the "axle", however I guess there is no other option, correct?


Attachments:
Moto-Rumi-Scoiattolo-hubs---front-dismantled.jpg
Moto-Rumi-Scoiattolo-hubs---front-dismantled.jpg [ 96.58 KiB | Viewed 43 times ]

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PostPosted: Wed Aug 16, 2017 11:37 am 
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Hi again,

Beside the fact I can not dismantling the front hub's bearing/axle/speedo gear, I am also struggling removing the gear lever of the engine cover.

As you can see at the photo, I removed everything else of that cover, including the kickstarter lever, that also has this "pin" to hold the lever in place. The one from the kickstarter came out more or less easy, but this one from the gear lever is really stuck.

As you can see at the photo, the thread is even gone (unfortunately) while I was trying to remove the "pin", so at this point I do not even care to damage more that "pin", as long as I manage to remove it.

Any advise for this and also for the front hub?

Attachment:
Moto-Rumi-gears-lever-stuck.jpg
Moto-Rumi-gears-lever-stuck.jpg [ 76.19 KiB | Viewed 37 times ]

Attachment:
Moto-Rumi-gears-lever-stuck-02.jpg
Moto-Rumi-gears-lever-stuck-02.jpg [ 79.48 KiB | Viewed 37 times ]

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PostPosted: Wed Aug 16, 2017 12:17 pm 
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With the nut off the pin it is just a case of knocking it through. They can be stubborn especially if it has gone in out of line. Be careful there are alot of cases around where people have damaged the casing by missing the top of the pin when drifting it out. The pin is going to have to be replaced anyway, so just give it a well aimed clout.

It's been along while since I removed that part on the hub that drives the speedometer.
Possibly Rudolf or Ian could advise?.


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PostPosted: Wed Aug 16, 2017 1:22 pm 
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hugo,best bet is to press out speedo side bearing from brake side.


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PostPosted: Wed Aug 16, 2017 2:07 pm 
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Hi,

At the end the bearings, axle, etc came out following what Rudolf mentioned before, exactly as for the rear hub, only that this side needed a bit more "strength". Ready for polishing. :D

Also the pin of the gears levers needed some stronger hits, instead using the nylon hammer I change it using the full metal one, now is all out.

Thank you Rudolf, Graham and Arthur for your advise.

Attachment:
Moto-Rumi-Scoiattolo-front-hub-dismantled.jpg
Moto-Rumi-Scoiattolo-front-hub-dismantled.jpg [ 77.27 KiB | Viewed 26 times ]

Attachment:
Moto-Rumi-engine-cover-clutch-side.jpg
Moto-Rumi-engine-cover-clutch-side.jpg [ 57.59 KiB | Viewed 25 times ]

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