P front axel removal from link - best method??
Post Reply    Forum -> Not-So-Modern
Author Message
Hooked
P200,Rally180, 100 sport , Cub90
Joined: 14 May 2009
Posts: 167

Tue Jul 30, 2013 9:22 am quote
hey I need to replace my front axel, do I heat up the alloy link and pound it out? do I need to go to a shop and have them press it out?
Molto Verboso
Joined: 15 Nov 2008
Posts: 1895
Location: Seattle
Tue Jul 30, 2013 10:02 am quote
Best method is to replace the fork downtube and swingarm and axle as an assembly.

Big time pain in the ass to do it how you want to do it.
Hooked
1981 P200E / 1979 P200E / 1974 Rally 200
Joined: 30 Jul 2009
Posts: 390
Location: San Francisco, CA
Tue Jul 30, 2013 11:35 am quote
I had the same question. I was going to remove the link to powder coat the fork. looks like it definitely needs a hydraulic press. is that just something prohibitively labor intensive?
Molto Verboso
px200
Joined: 13 Apr 2010
Posts: 1262
Location: london
Tue Jul 30, 2013 1:10 pm quote
Hello

The workshop manual has a whole section on replacing the link bearing that it calls the NADELLA and it is real performance, requires the use of a highly specialised workshop tool from vespa.

Grumpy
Molto Verboso
Joined: 15 Nov 2008
Posts: 1895
Location: Seattle
Wed Jul 31, 2013 7:21 pm quote
hjo wrote:
I had the same question. I was going to remove the link to powder coat the fork. looks like it definitely needs a hydraulic press. is that just something prohibitively labor intensive?
it definitly requires a press. and it definitly isn't easy to get it apart, let alone back together in serviceable shape. i'd definitly recomend custom makign the drifts and punches on a lathe.

i had access to the factory tools and several hours of free time one winter at scooterworks and tried to do one once just to see how bad it was. let's just say i've still never taken one apart.
Hooked
P200,Rally180, 100 sport , Cub90
Joined: 14 May 2009
Posts: 167

Wed Jul 31, 2013 9:11 pm quote
So, Thanks for the discouragement. No, I mean it - thanks Rob, I would have tried, now the burr on my axle doesn't look so bad.
Hooked
1981 P200E / 1979 P200E / 1974 Rally 200
Joined: 30 Jul 2009
Posts: 390
Location: San Francisco, CA
Thu Aug 01, 2013 12:41 am quote
can i powdercoat the fork with a swingarm on it? the rubber piece would melt, but there's not much left of it anyway...
Molto Verboso
px200
Joined: 13 Apr 2010
Posts: 1262
Location: london
Thu Aug 01, 2013 3:30 am quote
Hello

So will any grease left in the bearing


Grumpy
Hooked
1981 P200E / 1979 P200E / 1974 Rally 200
Joined: 30 Jul 2009
Posts: 390
Location: San Francisco, CA
Thu Aug 01, 2013 8:54 am quote
The parts look deceptively simple.

4950028.jpg

Molto Verboso
Joined: 15 Nov 2008
Posts: 1895
Location: Seattle
Thu Aug 01, 2013 10:15 pm quote
hjo wrote:
The parts look deceptively simple.
yes, they do.

i'm going from memory, so it's a little hazy, but the pin is pressed into the middle knuckle and the bearings are then pressed onto either side of it into the side pieces. those star washers are pressed into place aong with the bearings to hold the bearings in the swingarm and to prevent the pin from coming out. plus, the knuckle is cast in such a way that it is very hard to hold it in a press to remove the pin once you've managed to cut the star bits and the ends off the bearings so the pin can be pushed out. the sides are angled slightly so the fork swingarm doesn't want to stay put once you get it held in the press, it wants to go cockeyed and slide sideways rather than let the pin get pushed out.
Molto Verboso
px200
Joined: 13 Apr 2010
Posts: 1262
Location: london
Fri Aug 02, 2013 12:17 am quote
hello

Once the star fangled cap in the bearing is home they are difficult to remove, the dimple in the middle is smacked with a punch and the theory is that the fingers move towards the centre and are released, now the trouble with theories IS?

Grumpy
Hooked
1981 P200E / 1979 P200E / 1974 Rally 200
Joined: 30 Jul 2009
Posts: 390
Location: San Francisco, CA
Fri Aug 02, 2013 1:03 am quote
... it looks like you'd have to drill out one and press/punch out the other? if the star is removed, does the pin slide out?

then they need to be replaced with a press?

Maybe Krylon isn't so bad on forks. :)

Those bearings have to wear, though... they look so delicate for all the abuse they take.
Addicted
PX 200 E 'Iris' edition
Joined: 08 Sep 2011
Posts: 876
Location: Long Island, NY
Wed Aug 21, 2013 2:22 am quote
I'm glad I found this topic. Yesterday I removed the fork, and stripped it down to its essentials. I am looking to have it powdercoated, so I removed the hub, the backing plate...all I have left is the fork tube and the link with the axle stud on it.

The 2 rubber seals on the link pivots fell off on my workbench as I was...are these even possible to replace without taking the link off the fork tube?
Hooked
1981 P200E / 1979 P200E / 1974 Rally 200
Joined: 30 Jul 2009
Posts: 390
Location: San Francisco, CA
Wed Aug 21, 2013 6:08 pm quote
no. Those fit between the fork and the linkage.

But they're always chewed up and disintegrating on old bikes. and i've never seen anyone express concern over that.
Mr. Clean
P,SUPER,V90, 50 Special
Joined: 27 Jul 2010
Posts: 10207
Location: This is't my locker!
Wed Aug 21, 2013 6:43 pm quote
A friend from Germany sent me this writeup... he also made this cool press.. if you are Über handy and can build such a press you may have a fighting chance.
Good luck! I hope this helps!


Disassembly:
The best way is to destroy the lock washer somehow. I used a small milling cutter. Be carefully that you only destroy the lock washer and not the swingarm. Afterwards I used the milling cutter to remove the cover of the bearing. I did this on both sides. Next I used my tool to remove the shaft.
Finally remove the bearings from the siwingarm.




Assembly:
After powder coating/ spray painting I measured the width of the fork and the length of the new shaft. In my case it was 23,3mm (fork) and the 49,9mm (shaft) -> That means the shaft has to protrude 13,3mm left and right.
After pressing the shaft into the fork you have to put new bearings back to the swing arm. The swing arm has to have the same distance to the fork on both sides.
Finally I used a nut of my ratchet set to put the lock washer back to the swing arm.

image.jpg

Addicted
PX 200 E 'Iris' edition
Joined: 08 Sep 2011
Posts: 876
Location: Long Island, NY
Thu Aug 22, 2013 6:24 pm quote
Holy crap!
I guess it will be a rattle can and masking tape for me!!
Hooked
1981 P200E / 1979 P200E / 1974 Rally 200
Joined: 30 Jul 2009
Posts: 390
Location: San Francisco, CA
Thu Aug 22, 2013 6:29 pm quote
That photo makes me happy.

This might be a dumb question, but the parts are so simple. Would it be something you could take to a machine shop and have them press it in? It's like one of those jobs where you could find a place with a press to do it for $20.
Molto Verboso
Joined: 15 Nov 2008
Posts: 1895
Location: Seattle
Thu Aug 22, 2013 6:41 pm quote
hjo wrote:
That photo makes me happy.

This might be a dumb question, but the parts are so simple. Would it be something you could take to a machine shop and have them press it in? It's like one of those jobs where you could find a place with a press to do it for $20.
honestly, having tried it, it isn't.

i'd wager that if i were to take it to my go-to machien shop, they'd charge me at least their minimim hour charge, and probably more like 2-3. i'd wager it'd end up costing as much as a new assembled fork.
Enthusiast
1990 VBX1T P150SE Strada "The Great Strada"
Joined: 01 Jan 2012
Posts: 61
Location: Jakarta
Wed Oct 23, 2013 10:26 am quote
I use my home made hydraulic press to remove the shaft (or pin whatever it calls).. and use a C clamp & 15mm sockets to install.. Hope these photos will helpul, but apologize for poor quality of picture..


Removal :












Installation :







Team Scooter Trash for Petfinder Foundation   vespa scooterwest scooter west Motorsport Scooters   AF1 Racing Vespa Austin
Post Reply    Forum -> Not-So-Modern
[ Time: 0.1967s ][ Queries: 25 (0.0482s) ][ Debug on ]