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I had a '73 MG V7 Sport which had a different swing arm but a similar
arrangement.
I would think that if they came out easily, they should go back in
reasonably easily. If not, something is interfering with the refitment.
Perhaps:
1. inspect the fitment for any scoring or swarth that could be
interfering (I am certain that you already did this)
2. Swap the left bearing for the right to see if there are
dimensional differences.
3. Swap the bearing side you insert first into the arm
4. As mentioned, use a light abrasion like crocus cloth or scotch bright
pads to polish up the surfaces of the bearing and the swingarm cylinders
I know that it is little help, but if they came out without hammering, they
should go back without hammering. Something has changed that is causing the
interference fitment now and you will need to determine what has
happened/changed during the R&R process.
best,
doug
On Sun, Mar 24, 2024 at 3:57=E2=80=AFAM Al Fuller <alfuller194@gmail.com> w=
rote:
> Well, ok then... BTW, are the bearings and races not in the diagram you
> referenced or am I missing something?
>
> ________________
> Best Regards,
> Al Fuller
>
> On Sat, Mar 23, 2024, 11:23 PM Jim Franklin <jamesf@groupwbench.org>
> wrote:
>
>> Good thought but I should have specified that I tried inserting the pin
>> directly into the bearing race and it exhibited the same issue.
>>
>> jim
>>
>> On Mar 23, 2024, at 10:14 PM, Al Fuller <alfuller194@gmail.com> wrote:
>>
>> Jim, I don't know this part/assembly but it seems to me that the origina=
l
>> engineering would not have required hammering. Added to that one side go=
es
>> in well but not the other, I'm wondering if the bike might have a little
>> eccentricity in the fit-up? Is it possible that it was laid down at some
>> point in the past and has a little twist in the assembly?
>>
>> ________________
>> Best Regards,
>> Al Fuller
>>
>> On Sat, Mar 23, 2024, 10:17 PM Jim Franklin <jamesf@groupwbench.org>
>> wrote:
>>
>>> I'm assembling a Moto Guzzi swingarm which attaches to the back of the
>>> gearbox. The gearbox has 2 recesses in which live plain roller bearings=
.
>>> The swingarm has threaded holes through which locating pins screw. The =
tips
>>> of the pins are unthreaded and locate into the ID of of the roller
>>> bearings. Parts #12 here:
>>>
>>> https://harpermoto.com/collections/1980-1984-v-50-iii-500-swing-arm
>>>
>>> The pins are known for being stuck yet mine came out easily, probably
>>> because the inner race was able to rest against the swingarm while the =
pin
>>> was being pulled out. Assembly is another matter. The bearings don't bo=
ttom
>>> out in their recess so the inner race has nothing supporting it when I
>>> screw the pins into the swingarm, and one pin is not sliding into the i=
nner
>>> race (the other pin fits into both races as it should). I don't want to
>>> hammer on it and dent the races. I've sanded it with some 400 grit but =
I'm
>>> pretty sure the pins are hardened and so I haven't made any progress.
>>>
>>> Any thoughts on how to get this pin to fit in the bearing? Freezing it
>>> is not a great option because of the time it takes to get things instal=
led,
>>> plus I'll need to do clearance adjustments.
>>>
>>> thanks,
>>> jim
>>> _______________________________________________
>>>
>>> Shop-talk@autox.team.net
>>> Donate: http://www.team.net/donate.html
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>>> Archive: http://www.team.net/pipermail/shop-talk
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>>>
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>>>
>>>
>> _______________________________________________
>
> Shop-talk@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.96
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>
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small">I h=
ad a '73 MG V7 Sport which had a different swing arm but a similar arra=
ngement.</div><div class=3D"gmail_default" style=3D"font-size:small"><br></=
div><div class=3D"gmail_default" style=3D"font-size:small">I would think th=
at if they came out easily, they should go back in reasonably=C2=A0easily. =
If not, something is interfering with the refitment.=C2=A0=C2=A0</div><div =
class=3D"gmail_default" style=3D"font-size:small"><br></div><div class=3D"g=
mail_default" style=3D"font-size:small">Perhaps:</div><div class=3D"gmail_d=
efault" style=3D"font-size:small"><ol><li>inspect the fitment for any scori=
ng or swarth that could be interfering (I am certain that you already did t=
his)</li><li>Swap the left bearing for the right=C2=A0to see if there are d=
imensional=C2=A0differences.</li><li>Swap the bearing side you insert first=
into the arm=C2=A0</li><li>As mentioned, use a light abrasion like crocus =
cloth or scotch bright pads to polish up the surfaces of the bearing and th=
e swingarm cylinders</li></ol><div>I know that it is little help, but if th=
ey came out without hammering, they should go back without hammering. Somet=
hing has changed that is causing the interference fitment now and you will =
need to determine=C2=A0what has happened/changed during the R&R process=
.</div><div><br></div><div>best,</div><div><br></div><div>doug</div></div><=
/div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">O=
n Sun, Mar 24, 2024 at 3:57=E2=80=AFAM Al Fuller <<a href=3D"mailto:alfu=
ller194@gmail.com">alfuller194@gmail.com</a>> wrote:<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex"><div dir=3D"auto"><div>Well, ok the=
n... BTW, are the bearings and races not in the diagram you referenced or a=
m I missing something?</div><div><br></div><div>________________<br>Best Re=
gards,<br>Al Fuller</div></div><br><div class=3D"gmail_quote"><div dir=3D"l=
tr" class=3D"gmail_attr">On Sat, Mar 23, 2024, 11:23 PM Jim Franklin <<a=
href=3D"mailto:jamesf@groupwbench.org"; target=3D"_blank">jamesf@groupwbenc=
h.org</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:=
1ex"><div>Good thought but I should have specified that I tried inserting t=
he pin directly into the bearing race and it exhibited the same issue.=C2=
=A0<div><br></div><div>jim<br><div><br><blockquote type=3D"cite"><div>On Ma=
r 23, 2024, at 10:14 PM, Al Fuller <<a href=3D"mailto:alfuller194@gmail.=
com" rel=3D"noreferrer" target=3D"_blank">alfuller194@gmail.com</a>> wro=
te:</div><br><div><div dir=3D"auto"><div>Jim, I don't know this part/as=
sembly but it seems to me that the original engineering would not have requ=
ired hammering. Added to that one side goes in well but not the other, I=
9;m wondering if the bike might have a little eccentricity in the fit-up? I=
s it possible that it was laid down at some point in the past and has a lit=
tle twist in the assembly?</div><div><br></div><div>________________<br>Bes=
t Regards,<br>Al Fuller</div></div><br><div class=3D"gmail_quote"><div dir=
=3D"ltr" class=3D"gmail_attr">On Sat, Mar 23, 2024, 10:17 PM Jim Franklin &=
lt;<a href=3D"mailto:jamesf@groupwbench.org"; rel=3D"noreferrer" target=3D"_=
blank">jamesf@groupwbench.org</a>> wrote:<br></div><blockquote class=3D"=
gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(20=
4,204,204);padding-left:1ex">I'm assembling a Moto Guzzi swingarm which=
attaches to the back of the gearbox. The gearbox has 2 recesses in which l=
ive plain roller bearings. The swingarm has threaded holes through which lo=
cating pins screw. The tips of the pins are unthreaded and locate into the =
ID of of the roller bearings. Parts #12 here:<br>
<br>
<a href=3D"https://harpermoto.com/collections/1980-1984-v-50-iii-500-swing-=
arm" rel=3D"noreferrer noreferrer noreferrer" target=3D"_blank">https://har=
permoto.com/collections/1980-1984-v-50-iii-500-swing-arm</a><br>
<br>
The pins are known for being stuck yet mine came out easily, probably becau=
se the inner race was able to rest against the swingarm while the pin was b=
eing pulled out. Assembly is another matter. The bearings don't bottom =
out in their recess so the inner race has nothing supporting it when I scre=
w the pins into the swingarm, and one pin is not sliding into the inner rac=
e (the other pin fits into both races as it should). I don't want to ha=
mmer on it and dent the races. I've sanded it with some 400 grit but I&=
#39;m pretty sure the pins are hardened and so I haven't made any progr=
ess.<br>
<br>
Any thoughts on how to get this pin to fit in the bearing? Freezing it is n=
ot a great option because of the time it takes to get things installed, plu=
s I'll need to do clearance adjustments. <br>
<br>
thanks,<br>
jim<br>
_______________________________________________<br>
<br>
<a href=3D"mailto:Shop-talk@autox.team.net"; rel=3D"noreferrer noreferrer" t=
arget=3D"_blank">Shop-talk@autox.team.net</a><br>
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r>
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il.com</a><br>
<br>
</blockquote></div>
</div></blockquote></div><br></div></div></blockquote></div>
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</blockquote></div>
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