Help, primary fluid
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Cruiser
Joined: Feb 2010
Posts: 150
Likes: 0
From: rochester ny
Help, primary fluid
So I got a nice black primary cover in the mail today and want to put it on but my Harley dealership Is closed. My auto parts store has some motorcycle oil, what are my options, can I run the royal purple 10/40 for motorcycles? I have the gasket but no fluid, thanks for the help!
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
don't try this trick!
I would wait until you have same type fluid available-
the clutch disks absorb fluid ( about 7 oz will be held in the clutch). adding a possibly mis-matched fluid, may make for inconsistent clutch action.
you will need about 38 oz of fluid, so buy 2 quarts
and before you try this swap, lay the new cover down on a sheet of glass to enure that the sealing surface is fairly flat ( case not warped)
you will also want to disconnect you battery, it is possible to loose fingers working in an open primary case if you don;t
mike
Last edited by mkguitar; May 10, 2014 at 06:43 PM.
Elite HDF Member
Joined: Jul 2008
Posts: 4,741
Likes: 45
From: Indian Land, SC
Tell you what, you do it to yours and have someone video tape it so we can get a chuckle over you cussing up a storm after see all the fluid running onto your garage floor....
Supporter
Joined: Oct 2012
Posts: 1,242
Likes: 1
From: Farmingdale, New York
Oh damn, I obviously wasn't thinking when I posted. I was thinking derby cover. I'll shut up now........
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Road Captain
Joined: Mar 2009
Posts: 745
Likes: 5
From: Colorado City, Tx.
taking derby cover off and none will come out, taking primary cover off different situation all together. Primary oil is like engine oil, all have their own opinion. I have seen and heard everything from 10-30,10-40,aft,hd formula+,20-50.
I do know that clutch adjustment and primary oil change with the derby cover only off is 38 oz. on my 09 Ultra and primary cover off and re-install is 45 oz.
I do know that clutch adjustment and primary oil change with the derby cover only off is 38 oz. on my 09 Ultra and primary cover off and re-install is 45 oz.
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,530
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From: Honah Lee
Just land the stand on a scrap 2x6. No oil will come out. However, if you want to change it, get Harley's stuff. And check the clutch and free play on cable. Most of all, if it's torx, make sure the socket is tight. Some kits do not have the T27 and more then likely, the bolts may just have loctite on them. I never use it on maintenance covers but lots of dealer do. They are not worrying about next time, only that a screw does not come loose. If the have that paint on stuff, those screws can be so tight, the heads will strip out before the threads let loose unless a little heat or impact is used. Got to correct level, not amount. Bottom of clutch spring.
Last edited by Jackie Paper; Sep 14, 2018 at 11:07 AM.