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

New: Take part in the July Giveaway for a brand new 26" Thruster® Street Style BMX Cruiser Bicycle


Need Help with rear derailer on Schwinn
#1
I have '78 Chicago Schwinn Sprint I picked up from Goodwill for $15 and got it overhauled. Anyway, when I shift the rear gears, the shifter slowly moves back up to the highest gear, I could be in the lowest gear in the rear and in 40ft be back up to the highest gear, it shifts through each gear, no skipping. I don't want to keep my hand on the shifter the entire time. If it helps, I got a 77 sun tour rear derailer. Any help will be appreciated.
Thank you,
J

  Reply
#2
Assuming the cable is tight at the derailleur, what kind of shifter do you have?<br />
Friction or ratchet?<br />
If friction then there is usually some way of tightening it to stop it moving.<br />
If ratchet then possibly the ratchet has seized. You should hear it "click" at each gear position. If not then try some form of lubrication in the shifter. (~ WD40 ).<br />
If you can hear a definite click and the gear still moves back then the shifter may need changing?

Ride hard or ride home alone!
  Reply
#3
It's a friction type shifter, also it is hard to shift it to lower gears, but very easy to go back up to the higher gears.

  Reply
#4
There should be a bolt where the shifter pivots. You need to tighten that up a little. There's often a wingnut type fitting so you don't need tools. But these were often plastic and may have broken off over the decades. If this doesn't work pretty simply, you might try taking the shifter apart to clean and relube it by unscrewing this bolt. But be very careful to keep track of the order and orientation of each part. There will be several washers that have to go on in exactly the right way.
Stiff shifting may be due to corroded cables. Try dripping a little chain lube on the cable right where they go into the housing.

  Reply
#5
got it, there is a flathead screw there, tightened that up and haven't had a problem since!

  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
14,825
12-04-2016, 10:25 AM
Last Post: zebede
 
4,304
06-10-2014, 01:47 AM
Last Post: 1FJEF
 
8,202
12-28-2013, 12:21 PM
Last Post: cny-man
 
10,298
10-28-2013, 09:11 AM
Last Post: Cimbro
 
8,194
08-07-2013, 09:13 PM
Last Post: eyeyei

Forum Jump:

[-]
10 Latest Posts
Pinging noise fixed
Today 07:22 AM
60s Viner Repainted..?
Today 02:29 AM
Where are you from and What is your favo...
Today 01:22 AM
Need help finding a new rear derailleur
Yesterday 05:05 PM
FD cable pull on opposite side of frame
Yesterday 04:13 PM
26" Thruster® Street Style BMX | July 20...
Yesterday 03:34 PM
2020 road cycling season
07-04-2020 07:18 PM
COLSON TANDEM BIKE REAR STEERING
07-04-2020 08:44 AM
Work Table For Wheels
07-04-2020 08:29 AM
1980 Schwinn Suburban
07-03-2020 11:06 PM

[-]
Top 5 Posters This Month
no avatar 1. Jesper
62 posts
no avatar 2. CharleyFarley
17 posts
no avatar 3. Painkiller
15 posts
no avatar 4. Papa Dom
10 posts
no avatar 5. Joe_W
8 posts