Ducati Monster Forum

Moto Board => Tech => Topic started by: gage on November 24, 2008, 09:45:48 AM

Title: DSS Swingarm Removal - Pivot shaft won't budge
Post by: gage on November 24, 2008, 09:45:48 AM
Bike: 2002 S4 with Dual Sided Swingarm

Ok so I removed both of the clamp bolts and the circlips and then saturated with PB blaster as best I could and the pivot shaft refuses to move.

Questions:
1. Can someone describe how the clamp bolts work? I was thinking of threading one bolt in from the top and the other bolt in from the bottom to try to spread out the clamp.
2. I was also considering hitting it with a Mapp gas torch to see if that would loosen things up but wanted to check with you guys first to make sure that wasn't going to melt anything in there.

I'm sure that I need to hit it harder but before I do that I'm having a friend of mine make me a drift that will sit just shy of the OD and that has a finder pin to avoid mushromming the end of the shaft.

TIA
Gage
Title: Re: DSS Swingarm Removal - Pivot shaft won't budge
Post by: MotoCreations on November 24, 2008, 10:56:32 AM
You have some corrosion somewhere -- it should just slide out with typically a light tap.  Sometimes it needs a little "persusasion" though with a drift (like what you are doing) and a bigger hammer.
Title: Re: DSS Swingarm Removal - Pivot shaft won't budge
Post by: Speeddog on November 24, 2008, 11:39:59 AM
BRB with a picture....

These are the 'clamps' that hold the pivot shaft in, one on each side.

The long barrel goes in from the top, it's threaded inside.
The flat goes up against the pivot shaft.

The short barrel goes in from the bottom, it's flat goes against the pivot shaft.

The bolt goes in from the bottom, through the short barrel, and threads into the long barrel.

Remove all pieces and *then* you can tap the pivot shaft out.

If you don't remove the barrels, likely it'll f*ck things up when you try to hammer the pivot shaft out.

(http://farm4.static.flickr.com/3223/3056984770_b3379d6286_o.jpg)
Title: Re: DSS Swingarm Removal - Pivot shaft won't budge
Post by: Capo on November 24, 2008, 11:52:18 AM
+1 on corrosion, I've seen them where they had to be cut with a saw.
Title: Re: DSS Swingarm Removal - Pivot shaft won't budge
Post by: gage on November 24, 2008, 12:43:32 PM
Quote from: Speeddog on November 24, 2008, 11:39:59 AM
BRB with a picture....

These are the 'clamps' that hold the pivot shaft in, one on each side.

The long barrel goes in from the top, it's threaded inside.
The flat goes up against the pivot shaft.

The short barrel goes in from the bottom, it's flat goes against the pivot shaft.

The bolt goes in from the bottom, through the short barrel, and threads into the long barrel.

Remove all pieces and *then* you can tap the pivot shaft out.

If you don't remove the barrels, likely it'll f*ck things up when you try to hammer the pivot shaft out.


That's great info!!! [thumbsup]

I'm assuming that the barrels are friction fit into the swingarm?

Can the upper barrel be pulled out using a method similar to the "poor man's rocker pin puller"?

Also the lower barrel is not threaded if I am reading your post correctly... What's the best way to get that one out?

I can't figure out how there is corrosion in there (not doughting it BTW) because everything was pretty well caked with grease.  The swingarm has probably never come off in the last 15k or so I guess it is a good thing that I am doing it now.

Thanks Everyone!

Gage
Title: Re: DSS Swingarm Removal - Pivot shaft won't budge
Post by: gage on November 25, 2008, 08:51:09 AM
bump
Title: Re: DSS Swingarm Removal - Pivot shaft won't budge
Post by: Capo on November 25, 2008, 09:20:04 AM
The lower should fall out, the top can be removed by screwing a bolt into it from the top in a similar manner to a rocker pin puller.

The corrosion occurs between the steel pivot shaft and the aluminium swing arm, water gets drawn in by capillary action, soak this area well with WD 40 or even better Gibbs Brand and allow time (overnight) for it to penertrate.

Do you have any reason to believe that the swing arm has been previously removed? Time is the factor in corrosion not milage.
Title: Re: DSS Swingarm Removal - Pivot shaft won't budge
Post by: gage on November 25, 2008, 10:32:28 AM
Quote from: Capo on November 25, 2008, 09:20:04 AM
Do you have any reason to believe that the swing arm has been previously removed? Time is the factor in corrosion not milage.

In this case Time = Mileage. I got the bike two seasons ago with 3k on the clock. I soaked the thing with pb blaster so fingers crossed we'll see when I get the drift tomorrow.

Thanks