Harley Davidson Forums

Loading


Hello

Guest

Welcome to the harley davidson forum. Join our discussion today for FREE!

CREATE ACCOUNT

Membership Benefits

Get your questions answered by harley davidson community gurus and industry experts. Exchange your experience with another members. Access full features forum. Get a members discounts for your harley parts & accessories.

Fork Oil change and Progressive Springs

Dyna Models

Reply
 
Thread Tools Display Modes
Old Nov 6th, 2010, 09:40 PM     #1
Warming The Wheels
Ride: 2002 Lowrider
 
cmvsm's Avatar
 
Join Date: Sep 27th, 2010
Location: Florida
Posts: 87
cmvsm is an unknown quantity at this point
Fork Oil change and Progressive Springs

I get my J&S jack this week... I have a couple of things on my list, one of which is to change out the fork oil, as I get kind of an odd ride when taking a rough corner. Thought this might help a bit. I also thought I might as well change the springs out to Progressive while I'm in there. Have almost 28K miles.

Couple of questions. What is the size of socket that I will need...is it 35mm? I've heard a couple of different sizes and wanted to make sure I order the right size. Also, according to the service manual, changing the fork oil is as simple as elevating the bike, popping off the caps, draining the oil, pumping a few times, continue to drain the oil, replace with new oil, and reinstall the caps. Is replacing the springs as simple as removing the old spring and replacing with the new one once the caps are off, or is it more involved? My service manual covers removal of the forks, but not the springs specifically.

Any comments would be appreciated. Thanks.
cmvsm is offline   Reply With Quote
Old Nov 7th, 2010, 04:02 AM     #2
Moderators
Ride: 1992 Softail Custom
 
fin_676's Avatar
 
Join Date: Dec 21st, 2008
Location: Banffshire,Scotland
Posts: 4,606
My Mood: My Mood
fin_676 will become famous soon enoughfin_676 will become famous soon enough
Re: Fork Oil change and Progressive Springs

To be sure you get the correct size of socket just measure across the flats of the fork top cap as that is what the socket size fits
i have never stripped Harley forks but every other set of forks i have done once the top cap is off the spring is just pulled out there may be some pressure from the spring when the front wheel is off the ground so be very careful when removing the top cap as it may fly round your workshop

Brian
__________________
I try to put my brain in gear before my hands go on the keyboard


Self Help Information and Tips - Harley Davidson Community
fin_676 is offline   Reply With Quote
Old Nov 7th, 2010, 08:48 AM     #3
Account Removed
Ride: 2009 Dyna Low
 
Join Date: Aug 16th, 2009
Posts: 7,235
Hoople will become famous soon enoughHoople will become famous soon enough
Re: Fork Oil change and Progressive Springs

Quote: Originally Posted by cmvsm View Post
I get kind of an odd ride when taking a rough corner.
Odd ride as in....?


Don't know how much different your legs are to my FXDL but it was pretty easy to change the fork oil. Be sure to measure what you take out (oz) and let them drain upside down for a while.

The springs come right out through the top. Crack the top gland nuts while the stems are still pinched in the triple trees, then remove the legs. Lube the threads on the triple tree pinch bolts before you torque them to spec.

You are going to really like your J&S jack. It is a nice jack. Jim & Steve are great people.
Hoople is offline   Reply With Quote
Old Nov 7th, 2010, 09:02 AM     #4
Contributor
Ride: 2007 Electra Glide Classic
 
Breeze3at's Avatar
 
Join Date: Aug 18th, 2009
Location: Warner Robins, GA
Posts: 4,215
My Mood: My Mood
Breeze3at has a spectacular aura aboutBreeze3at has a spectacular aura about
Re: Fork Oil change and Progressive Springs

It's been a long time since I put Progressive springs in my Dyna. But I remember that the springs were wound closer at one end, and that end goes up. Also, the very fine cap threads are easy to mess up. I push down while turning counter clockwise until I feel a little "bump", then start to tighten carefully.
__________________
Pete / Breeze .380
_________________________________________
I don't ride fast, but I will ride far.

Last edited by Breeze3at; Nov 7th, 2010 at 09:03 AM. Reason: word missing
Breeze3at is offline   Reply With Quote
Old Nov 7th, 2010, 10:06 AM     #5
Banned
Ride: 2010 Street Bob
 
Join Date: Oct 27th, 2010
Location: Plymouth UK
Posts: 226
Admiral Nelson is an unknown quantity at this point
Re: Fork Oil change and Progressive Springs

when I changed the springs on my Sportster, the tech and I removed the caps with the forks in place and just changed the springs. Didn't mess with the oil. It took one of us to push the caps down whilst the other one tightened the caps down.
Admiral Nelson is offline   Reply With Quote
Old Nov 7th, 2010, 10:24 AM     #6
Contributor
Ride: 2007 FXD SuperGlide
 
SilverFoXD's Avatar
 
Join Date: Sep 1st, 2007
Location: Tempe, AZ
Posts: 374
My Mood: My Mood
SilverFoXD is on a distinguished road
Smile Re: Fork Oil change and Progressive Springs

Quote: Originally Posted by cmvsm View Post
I get my J&S jack this week... I have a couple of things on my list, one of which is to change out the fork oil, as I get kind of an odd ride when taking a rough corner. Thought this might help a bit. I also thought I might as well change the springs out to Progressive while I'm in there. Have almost 28K miles.

Couple of questions. What is the size of socket that I will need...is it 35mm? I've heard a couple of different sizes and wanted to make sure I order the right size. Also, according to the service manual, changing the fork oil is as simple as elevating the bike, popping off the caps, draining the oil, pumping a few times, continue to drain the oil, replace with new oil, and reinstall the caps. Is replacing the springs as simple as removing the old spring and replacing with the new one once the caps are off, or is it more involved? My service manual covers removal of the forks, but not the springs specifically.

Any comments would be appreciated. Thanks.
For my '07 Dyna the socket needed is the 1 3/8". Didn't find one to buy and wound up borrowing one from a buddy but would like to have one of my own. (If you find a source, please post.) A 35 mm is very close at 1.378" as compared to 1.375"; might ask the sales person if you can take the socket out to the bike to be sure it fits.

Also have the Progressive front springs but to tell the truth, couldn't tell much difference in the ride from the stock. I had them in my previous two metric bikes, and they did improve the ride, but apparently the HD springs are pretty good.

Doesn't matter which way you install them, per the Progressive instructions, as they compress the same in use. Be careful installing the cap, as others pointed out, as the threads are fine and easy to cross-thread.

FYI, the instructions I received specified a different length spacer than the one supplied. I went with the instructions, cut a new spacer from plastic pipe, took a trip and was disappointed. Replaced with the supplied spacer and all is well. Just be aware of a possible conflict, your bike has different diameter forks, uses different springs, and perhaps a different length spacer.

Good luck,

Silver
__________________
Behind every successful man is a woman. Behind the fall of a successful man is usually another woman.
SilverFoXD is offline   Reply With Quote
Old Nov 7th, 2010, 10:28 AM     #7
Wise Member
Ride: 0
 
Join Date: Jun 21st, 2007
Posts: 26,212
My Mood: My Mood
glider is on a distinguished road
Re: Fork Oil change and Progressive Springs

1-3/8 in. Socket, 12 pt.- Craftsman-Tools-Auto & Mechanics Tools-Sockets


Check your local auto-zone, the prices are usually better.
glider is offline   Reply With Quote
Old Nov 7th, 2010, 10:50 AM     #8
Moderators
Ride: 1992 Softail Custom
 
fin_676's Avatar
 
Join Date: Dec 21st, 2008
Location: Banffshire,Scotland
Posts: 4,606
My Mood: My Mood
fin_676 will become famous soon enoughfin_676 will become famous soon enough
Re: Fork Oil change and Progressive Springs

As the forks are made by showa then i would expect it to be all metric sizes used so went out to shed and measured mine and i got 34mm however that is on a 92 softail custom
so went to try a socket on it and found i dont have a 34 i have a 32,36,38 ok i supose ill have to go tool shopping again

Brian
__________________
I try to put my brain in gear before my hands go on the keyboard


Self Help Information and Tips - Harley Davidson Community
fin_676 is offline   Reply With Quote
Old Nov 7th, 2010, 12:22 PM     #9
Banned
Ride: 2010 Street Bob
 
Join Date: Oct 27th, 2010
Location: Plymouth UK
Posts: 226
Admiral Nelson is an unknown quantity at this point
Re: Fork Oil change and Progressive Springs

Defo 1 3/8 socket on a SB
Admiral Nelson is offline   Reply With Quote
Old Nov 7th, 2010, 01:10 PM     #10
Warming The Wheels
Ride: 2002 Lowrider
 
cmvsm's Avatar
 
Join Date: Sep 27th, 2010
Location: Florida
Posts: 87
cmvsm is an unknown quantity at this point
Re: Fork Oil change and Progressive Springs

Thanks for all of the replies everyone. In answer to Hoople's and Smitty's question, when I ride around a corner that might be a little less than smooth, I can almost feel the dampening through the handlebars, whereas riding straight ahead, I don't feel anything. The bike is coming up on 30K, and thought with a fluid and spring replacement, it might help out. Although I do want to try my J&S out that I have coming.

I went to the Progressive site, and their installation videos are very helpful. Looks about like I thought it would be in terms of the labor portion. Says in my service manual that the forks do not need to be removed to change out the fork oil, and the Progressive videos state the same thing with respect to the springs.

I also noticed that Progressive has a fork lowering kit for my bike. Would this noticeably improve the handling?
cmvsm is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Anyone run the progressive suspension fork springs? BrettG Sportster Models 9 May 1st, 2010 08:47 AM
front fork springs Benito1976 Other Service and Maintenance 5 Apr 12th, 2010 05:58 PM
Progressive front springs on a Nightster? DelawhereNightsterGuy Sportster Models 11 Feb 2nd, 2010 06:29 AM
Progressive fork springs johnv50 Touring Models 4 Sep 26th, 2009 03:42 PM
Replacing Fork Springs Fossil Wheels 3 Jan 27th, 2009 10:11 PM