Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.


Bearing\hub inspection
#1
<img src="http://www.myhostedpics.com/images/moosemoose/2001trek4900.jpg" alt="image hosting by http://www.myhostedpics.com/" />img

Hello everyone,

I was given a 2001 Trek 4900, I'd like to make it my dedicated trainer bike but it has a few issues...

First of all I'm new to bicycle repair and my knowledge of parts identification is still at a basic level. So bear with me, in the picture of my freehub I believe it is called the number 1 points to a spline, with a total of 12 grooves and a inside diameter of .9 inches (22.86 mm) groove to groove. I would like to take off these parts to investigate bearing damage on this side of the hub. Is this a right hand thread (counterclockwise to remove)? What tool will fit this spline? What is the name of #2 and will it come off when the spline is removed?
  Reply
#2
What you have is not a freehub, but a partially disassembled freewheel. The tool to remove this is called a "shimano freewheel removal tool", you can google it or buy at pretty much any bike shop. It will fit in the splines and unscrew the ratcheting body (#2) (normal threads). That will uncover the drive side axle bearings so you can inspect, repair, etc.

It is possible to disassemble the ratcheting body by unscrewing the lockring that has the two little holes on the outside. Note that there's lots of small bearings and springs inside this. Most people do not bother to open up and service freewheels as they are easily replaced at low cost.

More info here: http://sheldonbrown.com/free-k7.html
EOF: obligatory SB link
  Reply
#3
Thanks Dave
(10-20-2011, 01:48 PM)DaveM Wrote:  What you have is not a freehub, but a partially disassembled freewheel. The tool to remove this is called a "shimano freewheel removal tool", you can google it or buy at pretty much any bike shop. It will fit in the splines and unscrew the ratcheting body (#2) (normal threads). That will uncover the drive side axle bearings so you can inspect, repair, etc.

It is possible to disassemble the ratcheting body by unscrewing the lockring that has the two little holes on the outside. Note that there's lots of small bearings and springs inside this. Most people do not bother to open up and service freewheels as they are easily replaced at low cost.

More info here: http://sheldonbrown.com/free-k7.html
EOF: obligatory SB link
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
1,289
10-22-2024, 09:38 AM
Last Post: rydabent
 
15,551
05-08-2015, 06:56 PM
Last Post: edge
 
21,229
05-05-2015, 01:12 AM
Last Post: ani1319
 
6,395
11-16-2014, 04:30 PM
Last Post: JanJ

Forum Jump:

[-]
10 Latest Posts
Pogačar's 2024 dominance
Today 04:20 PM
Giant reporting profits are 60% down
Today 10:50 AM
Thoughts on tariff effects on the cyclin...
Today 10:30 AM
braking by reversing the pedals
Today 09:00 AM
Post-Ride Nutrition
04-03-2025 02:06 AM
🚴‍♂️ Saddle Up for the Belgian Waffle Ri...
04-03-2025 02:03 AM
Pre Ride Food Intake
04-03-2025 12:14 AM
SAVA Explorer 6061?
04-02-2025 03:31 PM
Zwift v Spin v Wahoo
04-01-2025 05:59 PM
Have you Ever Tried an Electric Bike?
04-01-2025 05:07 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. GirishH
22 posts
no avatar 2. Flowrider
18 posts
no avatar 3. Jake1
14 posts
no avatar 4. meamoantonio
12 posts
no avatar 5. SPINMAN
9 posts