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04-0373/B Dommi/Atlas Clutch Rod Seal

The clutch rod seal pictured below was designed and manufactured at the request of several Pre Commando clutch Norton owners. It can also be used on a conversion Commando clutch. It is basically for use with the Atlas/Dommi transmission mainshaft. The problems to be solved were basically the same as for the Commando. Dragging clutch while disengaged, and slipping clutch upon engagement. Complaints of significant amounts of gearbox gear oil migration into the primary causing fluid level changes.

The same technique of oring sealing the clutch rod against the end of the mainshaft was used. However, the method to hold the o-ring had to be modified due to the Dommi mainshaft threads not going all the way to the end of the shaft as the commandos shafts threads do. This required a two piece device to do the same job. Therefore, a special extended clutch retention nut is supplied as part of the kit.

Atlas Seal On Mainshaft


Atlas Clutch Rod Seal On Clutch


The main clutch retention nut should be replaced with the special long nut.
Screw it on all the way, but just finger tight!
Polish the outer  1" of  the clutch rod.
Reinstall the rod back in the mainshaft.
Install the oring into the holders oring  groove and insure it is fully seated.
Slide the seal  holder over the end of the rod and screw into the extended nut a few turns. Do not "bottom out" the seal holder.
Fully secure the special clutch center nut.
Apply blue locktite at nut/seal holder joint..
Finish tightening down the seal holder. The proper clutch spring adjusting tool (split screwdriver) should work well.
Screwdriver tight should be all that is needed. 1-2 ft/lbs.
To remove. just remove the clutch center nut, and then screw out the seal retainer from the nut..

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