Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > Monsters > M620Sie Swingarm removal

[skidlids]

Oh what a fun job it is
Removing the swingarm from the rear of the engine.
Firstly I didn't know that the pinch bolts were actually cotter-pins, similar design to those used for fixing the pedal cranks on push bikes, and as such why the hell do Ducati put a Allen bolt recess in the top of them.
After removing the 10mm Hex nuts from the underside of the swingarm, I gave the bolts a little tap as they didn't budge I assumed they were threaded and the nut already removed acted as a lock nut. WRONG, bad assumption that as I broke a decent 1/2 drive Allen key trying to undo them.
After a call to AK and bouncing ideas off him we came to the conclusion that they must have a flat on them and would need knocking out. This turned out to be the right method just needed a good knock with a 2LB hammer.
With these cotter-pins out I then proceeded to remove the circlips from the end of the swingarm pivot shaft.
Now the next fun and games have started, trying to remove the pivot shaft from the swingarm.
It didn't want to knock out with a drift and the 2LB hammer even after a good soaking with easing fluid.
I have now resorted to using a draw bar, actually I'm now on my second one after stripping the threads on the first.
While I'm typing this it is sat under a fair bit of pressure while having been dosed in easing fluid yet again.

This is a 4 year old bike and does make me wonder if Ducati have ever thought of using something like copper-slip at the assembly stage

Oh well back to work as I want to try and seperate the engine from the swing arm by the end of the evening

[AK]

did you get it out kev in the end?

barstewards they are

[Scooter916]

Kev an issue we come across every day on out Scooters, The italians assemble things pretty dry, Its down to us the dealer to strip and lubricate pivots etc as part of the pre delivery inspection, We now do everything on a bike, But after 3 years its paying dividens as when they come in for work a simple whistle is all it takes to strip usually siezed parts, If the selling dealer is aware of a common issue after a few years use they should flag it up the chain so that the PDI can be ammended and save the issues that you are now having.
Doesnt help you but it could if dealers cared.
Glyn

[Jools]

Now you know why I had so much hassle trying to fit an alloy ST4s swingarm to my ST2.

It was pretty clear to me that from where the pinch bolt holes were located in the swingarm that the 'pinch bolts' would have to be some sort of cotter pin - because the pinch bolt holes intersected the swingarm pivot hole, so the bolts would have to have a flat on them.

Trouble is that the swingarm I got off eBay came without the swingarm pivot and without the cotter pins. The pivot was OK - exactly the same part number as my ST2 - but the cotter pins I had them on back order with both Nelly and JHP for nearly a year and they still couldn't get them. Now you know that both Nelly and JHP can usually pull rabbits out of hats when it comes to parts so it wasn't their fault - the damn things are just nigh on unobtainable.

In my case I just gave up and left the original swinger on.

The moral is...DON'T THROW THE OLD COTTER PINS AWAY.

PS: I suppose that if you've got a damaged one that got mullered taking it out, you've always got a pattern that you could get a local engineering shop to replicate, in my case I had no idea what size or shape they should've been apart from the sketch in the parts catalogue.

[skidlids]

Jools from what you said I will have to keep them with the Alloy swingarm for when I sell it on, but I may take a few pics of them before hand.
I tried un-doing them as I was acting on information that led to me believing they pulled a cone shaped wedge into postion from underneath. This may well be true on other bikes somwhere but not on the M620.
I still haven't managed to remove the pivot although I have so faf managed to move it 25mm with my draw bar, just made a lonfer sleeve for my draw bar that should allow me to move it about another 6mm which will hopefully see it clear of one side of the swingarm, I'm hoping that at this point it will become easier to move.

[paynep]

Hmm, mine came out fine - undid the pinch bolts and drifted it out using the pukka Ducati tool which I bought to get my 916 apart many years ago and has been used on 916s, 888/851s, SSs and the 620. Its an alloy bar that is turned down at one end to fit into the pivot and has a head that you can belt to push the pivot through. Its also dead useful for lining everything up on reassembly to get the shims right.

Not much help immediately, but a worthwhile investment. Alternatively if you have access to a lathe you can copy mine in return for a spare for me.....