Grease in the primary chaincase A10

[muskrat]

G'day Phil.
I've never had much luck using o rings under the screw heads. Tightening the screw squashes the o ring out of shape and impossible to get good torque on the screws. I found thick fiber washers work better.
Does yours have the drain/oil level bolt from under the outer cover?
Cheers

[trevinoz]

Have you got the two gaskets between the case, spacer and crankcase?

[berger]

the front three  5/16 screws go into crankcase and get oil down the threads and sometimes between engine and primary inner where there's two gaskets and a steel spacer, they can be a swine to stop weeping unless you want to put oil resistant thread lock on . not something I would do , I used a small amount of ptfe and it cured mine, make sure the inner case is plumb and fastens correctly to the frame near the foot rest, sometimes it has to be spaced with a washer or suitable spacer

[orabanda]

Hi Phil,
Welcome to the Forum!
Fibre washers behind the drain and level screws will seal them perfectly; o-rings are "hit and miss".
Draganfly and other well known BSA suppliers will have them.
Richard

[Swarfcut]

Phil, As mentioned  earlier, (Trev)  if assembled correctly your engine should have a circular metal spacer, 42-7509, between the drive side case and the inner primary cover. Listed as a "Joint Washer".  Use two gaskets, one each side of this circular spacer, bedded with your favourite jointing. A cereal packet makes good material for these homespun gaskets and should stop the drips.

 The primary case should not need O rings under the bolt heads. The chain case gasket seals the mating faces of the the inner and outer cases, this obviously includes the entire area around the bolt holes. When the cover is pulled down nice and tight, oil is excluded from the bolt holes as the gasket settles and seals. O rings will just get squashed. The exception is on earlier models which have cutaways  on the internal face of the primary cover casting for level and drain. These bolt positions each need a fibre washer to seal. Thanks "O".

 The inner case should bolt to the frame at the rear mounting without being under any strain, as berger says, washers or a spacer sometimes needed here.



 Swarfy.

[Greybeard]

I don't like Allen screws in these cases because they can be overtightened and distort the case and also pull up the metal around the threaded holes. If you must use Allen screws only tighten them with a screwdriver with a hex bit.

[duTch]

 Those fibre washers must be a special item, as I can't find them anywhere and even when I ordered them specially from the dreaded DraganQueens, they sent me something totally wrong - and 'O' rings didn't work for me either- but maybe worth doing them between the joint faeces


 

I don't like Allen screws in these cases because they can be overtightened and distort the case and also pull up the metal around the threaded holes. If you must use Allen screws only tighten them with a screwdriver with a hex bit. 

 I understand that, but in the words of Dirty Harry, " a man needs to know his limitations"....an Allen key will do the job if one doesn't use a breaker bar

[Greybeard]

Those fibre washers must be a special item, as I can't find them anywhere

I got lucky. I found a box of assorted fibre washers in Aldi's. I've put fibre washers on all the primary case screws.

[duTch]

 

Quote from: duTch on Today at 20:01:24

    Those fibre washers must be a special item, as I can't find them anywhere

 I got lucky. I found a box of assorted fibre washers in Aldi's. I've put fibre washers on all the primary case screws.

 The trouble with assorted packs is having 95+% crap that there's never a use for....until 10 seconds after ditching the 95% 

[Greybeard]

The trouble with assorted packs is having 95+% crap that there's never a use for....until 10 seconds after ditching the 95% 

Aldi stuff is cheap.

[muskrat]

G'day fellas.
I use the thickest 1/4" id fiber washers, put 6 on a screw with a nut, stick screw in the drill and grind the od to size.
Cheers.

[chaterlea25]

Hi All,
I read on another forum recently where someone resorted to welding up the inner ends of the tapped holes
on the inner primary case 
Non setting gasket sealer on the threads (hylomar or DP300) works well for me

John

[duTch]

 

...I read on another forum recently where someone resorted to welding up the inner ends of the tapped holes
on the inner primary case  ....

  yep .....

 

....I use the thickest 1/4" id fiber washers, put 6 on a screw with a nut, stick screw in the drill and grind the od to size....

 I did that with a couple but that stuff is harder than it looks

[Peter in Aus]

I use allen screws with no washers and use a allen key to tighten. no leaks and use ATF