Changing primary fluid
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Road Warrior
Joined: Jul 2010
Posts: 1,645
Likes: 1
From: Orangetown, NY
Changing primary fluid
I am going to replace the primary fluid on my 08 Fat Bob any tips for a newbie and how do you put the oil into the derby cover with out it spilling out. How much fluid do I put in, was toid a quart to 38 0z.s from the dealer. Whats right? Thanks for the help in advance. Ride safe
Outstanding HDF Member
Joined: Jan 2010
Posts: 2,030
Likes: 195
From: Harford Co., Maryland
I don't have one, but they sell a special funnel for filling the primary, HD part # 63797-10
http://www.harley-davidson.com/gma/g...bmLocale=en_US
http://www.harley-davidson.com/gma/g...bmLocale=en_US
Road Master
Joined: Jun 2009
Posts: 796
Likes: 0
From: Central NJ
I fill mine up to the bottom of the derby cover hole. I have a small funnel that I picked up at Wally-World that has a lip on one side (makes it easier to pour into when it's on an angle).
I use Rotella-T in the primary. ~$3/qt at Wally-World, and it's JASCO approved.
Make sure you've got a T-27 Torx bit for the derby screws, and make sure the bit is seated properly. Read too many horror stories about guys stripping the heads on their derby bolts.
I use Rotella-T in the primary. ~$3/qt at Wally-World, and it's JASCO approved.
Make sure you've got a T-27 Torx bit for the derby screws, and make sure the bit is seated properly. Read too many horror stories about guys stripping the heads on their derby bolts.
Ultimate HDF Member
Joined: Apr 2008
Posts: 5,384
Likes: 12
From: Out on Deranged
It is one quart of oil, True about the #27 torx bit. Bring your bike somewhere level and place something under the jiffy stand like a piece of wood ( i use two 3/4 inch squares of plywood) to get the bike level. {Be real careful not to let her tip over - of course} and use a flex funnel and just hold the spout up high,it doesn't matter if the oil is running down the clutch pack that's what the oil is for. unless you go out and get the special little funnel HD sells. Good Luck! Ride safe!
Road Master
Joined: Apr 2010
Posts: 839
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From: USA
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Stellar HDF Member
Joined: Jun 2007
Posts: 2,178
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From: SoCal.....I'm only here for the weather
I've never used a funnel. Put the bike level with a 2 x 4 under the jiffy stand and pour directly from the bottle over the clutch pack.
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