primary fluid servicing ?
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Road Captain
Joined: Aug 2013
Posts: 654
Likes: 5
From: oklahoma
primary fluid servicing ?
i have changed my fluids before but i was wondering about the primary fluid. i know how not enough fluid can hurt the primary but can too much hurt it? if you put 1-7 extra ounces will this effect anything? not sayin to do it just wondering if it effects anything
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
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From: Phoenix '53, '88, '09 Big Twins
you'll need about 38 oz ( so buy 2 bottles of the primary+ lube) the level check is visual as outlined in the manual.
what happens with extra fluids, is that the lube can be whipped into a foam and a foam does not lube bearings as well.
if you really want to get all the old stuff out, drain it and then put a zip tie on teh clutch lever...the lube in the clutch can then drain out...I leave over night.
I may even briefly start the bike in the morning to spin out any remaining lube.
maybe 2 or 3 oz difference
mike
what happens with extra fluids, is that the lube can be whipped into a foam and a foam does not lube bearings as well.
if you really want to get all the old stuff out, drain it and then put a zip tie on teh clutch lever...the lube in the clutch can then drain out...I leave over night.
I may even briefly start the bike in the morning to spin out any remaining lube.
maybe 2 or 3 oz difference
mike
Last edited by mkguitar; Feb 21, 2014 at 08:42 PM.
Seasoned HDF Member
Joined: Jan 2007
Posts: 20,616
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From: anacoco, la
what i do when servicing my bike is to adjust the clutch before i do anything else. that way the clutch is at ambient temperature as per the manual. then i run the bike to get everything up to operating temp.
apparently i'm not as **** as mike is about getting every last drop of old primary fluid out
which is not necessarily a bad thing to do...... i just park the bike upright in my condor chock, and drain the fluids until they stop.
oh one thing i would recommend. do not drain the primary until after you get the derby cover screws out. i don't usually have a problem with them, but i would hate for everything to be drained and then not able to get the screws out.
apparently i'm not as **** as mike is about getting every last drop of old primary fluid out
which is not necessarily a bad thing to do...... i just park the bike upright in my condor chock, and drain the fluids until they stop.oh one thing i would recommend. do not drain the primary until after you get the derby cover screws out. i don't usually have a problem with them, but i would hate for everything to be drained and then not able to get the screws out.
Outstanding HDF Member
Joined: Dec 2008
Posts: 2,007
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From: Ohio
Too much fluid can make getting the bike into neutral more difficult. Way too much will prevent the clutch from fully disengaging. Also if you change it and put in 32oz instead of 38oz you will be fine.
Seasoned HDF Member
Joined: Apr 2006
Posts: 10,675
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From: Billings,Mt.
Adding too much can cause hard shifting from reading everything here.
You can probably get away with a few ozs. but why not just go with 38 ozs.?
You can probably get away with a few ozs. but why not just go with 38 ozs.?
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Road Captain
Joined: Aug 2013
Posts: 654
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From: oklahoma
its not that i dont try to put the 38 oz in there but before i got a measuring device i would add the 1st quart the just guestimated the next few ounces. i was just wondering if it actually bothered anything with a little extra
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Extreme HDF Member
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From: Phoenix '53, '88, '09 Big Twins
Mike