Freehub Issue
#1
Junior Member
Thread Starter
Join Date: Jul 2009
Posts: 17
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Freehub Issue
I have a new Shimano Dura-Ace, FH-7800 free hub with less than 1k miles that is giving me problems. After coasting during a ride and I began to pedal again to keep or increase pace, something seems to “slip” before I get to full load. I don’t experience the problem when the hub is under load, but just as the cassette begins to move forward. A riding friend suggested it may be that the yawls inside the hub are not engaging correctly. Does this make sense to anyone? Do I need to lube the hub or return it to my LBS?
#2
Great State of Varmint
Join Date: Sep 2008
Location: Dante's Third Ring
Posts: 7,476
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 15 Times
in
15 Posts
If it's new - take it back to the store. Let them sort it out. I keep hearing about DA parts and components not working right.
#3
50/50 Road/eBike Commuter
#5
50/50 Road/eBike Commuter
#7
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,096 Times
in
742 Posts
Any chance that what you are experiencing is just the bike going faster than you are pedaling in the selected gear? If you pedal too slowly, the hub won't "catch" because you aren't rotating the pedals as fast as the freehub is rotating.
If the pawls really aren't catching properly and the hub is that new, have it warrantied. Dura Ace has a 3 year warranty period.
If the pawls really aren't catching properly and the hub is that new, have it warrantied. Dura Ace has a 3 year warranty period.
#8
Senior Member
Join Date: Aug 2005
Location: near Albany, NY
Posts: 99
Bikes: Felt F70
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
+the warranty route.
Here's a diagram of your wheel if it helps visualize potential problems:Shimano FH-7800.
If you aren't sure what pawls look like then see pic 2, 6 and 7 on this page for a good look (click on the pics for bigger ones) - those have 6 pawls on the hub, your wheels have 3 pawls on the freehub Good pics of freehub and pawls
Here's a diagram of your wheel if it helps visualize potential problems:Shimano FH-7800.
If you aren't sure what pawls look like then see pic 2, 6 and 7 on this page for a good look (click on the pics for bigger ones) - those have 6 pawls on the hub, your wheels have 3 pawls on the freehub Good pics of freehub and pawls
#9
Junior Member
Thread Starter
Join Date: Jul 2009
Posts: 17
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Thanks to everyone that contributed to this thread. The comic relief of some of you was appreciated as was the technical contributions of e2py and HillRider (In response to your query HillRider, there is a slip of the pedals and a snapping sound just as the pedals come under load from the cassette.)
I refuse to go my LBS with a problem without first researching the forums because I like to intelligently communicate my problem to them and I like have an idea of what I can expect from them in response. Thanks again everyone.
I refuse to go my LBS with a problem without first researching the forums because I like to intelligently communicate my problem to them and I like have an idea of what I can expect from them in response. Thanks again everyone.
#10
Newbie
Join Date: Jul 2009
Location: the tip of the southern sierras, the Kern River Vally
Posts: 4
Bikes: MTB, roady, rail bike, touring w 650b's
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
an excellent freehub lubricant
Without knowing the history of the FH it is hard to say why it is giving you trouble. Shimano's lubes tend not to be the best for to prevent water contamination. Was it exposed to rains ??
The mechanism used on the wh-7800 is very similar to that used on the Neuvation wheels. Neuvation has very little or no problems because they lube their FH's at the factory with the lubricant especially made for the light action found in freehubs that is produced by morningstartools.com.
I'd recommend pulling the wheel, remove the FH, clean it completely and then lube it with the FH "soup" produced there, the stuff gets rave reviews.
Happier trails, PM'star
The mechanism used on the wh-7800 is very similar to that used on the Neuvation wheels. Neuvation has very little or no problems because they lube their FH's at the factory with the lubricant especially made for the light action found in freehubs that is produced by morningstartools.com.
I'd recommend pulling the wheel, remove the FH, clean it completely and then lube it with the FH "soup" produced there, the stuff gets rave reviews.
Happier trails, PM'star
#11
Junior Member
Thread Starter
Join Date: Jul 2009
Posts: 17
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Thanks again for your response.