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

New: Take part in the October Giveaway for the Haven Bicycle Co. beach cruiser


25 year old 6 speed shimano derailleur
#1
I have an old bike I'm trying to rehab to give away. It has a Shimano 6 speed front and rear derailleurs that has POSITION FH adjust stamped on the front. Through a square hole in the face of the derailleur you can see an adjustment screw. From the rear of the derailleur you can see another screw. There is no notation as to what function they perform. It doesn't seem to have a barrel adjuster or anything marked as high and low limit screws. The derailleur cable is secured by a hex nut rather than a hex screw. I'd like to find information regarding setting the high and low limits as well as how to adjust derailleur cable tension. The front derailler does have the limit screws marked clearly. I have images attached if anyone thinks they can help.
Thanks
Rick
  Reply
#2
At a guess, I would say that the one on the front is the high gear limit stop. Try turning it clockwise, you shold see the derailleur move slightly inwards and back outwards when you turn the screw anticlockwise.

Are the gears indexed, or are they just a friction shift? If they are just friction they don't need a barrel adjuster.

The derailleur will be in the highest gear, smallest sprocket, when there is no cable tension. So to set up the limits and the cable, first loosen the cable clamp bolt so that the cable is free, then set the high limit so that the chain runs smoothly in the highest gear, but cannot come off the smallest sprocket. Pull the cable through the clamp bolt so that its taught enough to not flap about against the frame, but not so tight that it alters the derailleur position and tighten clamp bolt. Next adjust the shifter so that the derailleur is in the lowest gear, biggest sprocket, and set the low limit so that it runs smoothly, but can't go too far and off into the spokes.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
4,015
07-23-2021, 10:36 PM
Last Post: Jesper
 
4,315
03-02-2014, 04:12 PM
Last Post: cny-man

Forum Jump:

[-]
10 Latest Posts
WD40 on chain?
Today 01:21 PM
2021 Pro Road Cycling
Today 01:18 PM
Fell in 💙 w/this bike- need info on it t...
Yesterday 05:55 PM
What was your first bicycle?
10-21-2021 09:04 PM
V Brakes just won’t adjust properly
10-21-2021 06:54 PM
29er MTB full suspension
10-21-2021 04:26 PM
Souke Sports Cycling Apparel Discussion ...
10-20-2021 10:11 PM
VINTAGE DERAILLEURS: Campagnolo 50s-80s
10-20-2021 04:07 PM
How to replace rear shock spring
10-19-2021 10:34 PM
Want to convert my 2012 salsa Fargo 2 to...
10-19-2021 12:51 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. Souke Sports
28 posts
no avatar 2. JoJoJo
11 posts
no avatar 3. Criminal
10 posts
no avatar 4. Jesper
8 posts
no avatar 5. JR Namida
5 posts