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

New: Take part in the November Giveaway for the TurboAnt Thunder T1 Fat Tire E-bike


Tightening SL-M570 Thumb Lever
#1
I have a Shimano Deore SL-M570 shifter (circa '00) that has a lot of up and down play in the thumb lever for the front derailer. Unless I press the thumb lever upward toward the body of the shifter, the loose condition causes it to miss the pawl to shift from the second to the third chain ring. If I open up the bottom cover on the shifter, it would appear that it can be tightened by the hex bolt that is visible, but there is a small metal plate underneath it, with two tabs that stick up on two sides of the bolt, apparently preventing it from turning (see picture here). Is this, indeed, how to tighten the thumb lever, and if so, how can I tighten it with those metal tabs in place?

Thanks.

[Image: view?usp=sharing]
  Reply
#2
I presume the tabs are there to prevent the bolt turning from the rotation of the shifter. You may be able to bend the tabs down, tighten, and then bend back up.
  Reply
#3
It sounds to me that the shifter is worn out, They are not meant to be taken part further than removing plastic covers. however the way I see it as it is broke already so go for it and see what happens. I have had older models torn down to a pile of parts and springs before and assembled back to functioning shifters again.
There are two kinds of people in the world, "Those who help themselves to people, and those who help people!"
  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
Seeking recommendations
Today 03:32 AM
Which aspects of e-bikes do you think ar...
Yesterday 10:24 PM
Help! Trying to identify this bike
Yesterday 02:45 AM
Please help me identify this old bicycle...
12-02-2021 11:36 AM
What is your dream cycling destination?
12-01-2021 02:33 AM
LYGIE AND ATALA WINTER PROJECTS
11-30-2021 10:34 AM
Yet another bike ID thread (Pseudo-Batta...
11-30-2021 06:18 AM
Schwinn meridian fork replacement
11-30-2021 12:41 AM
New Memeber
11-27-2021 06:51 PM
Budget Carbon Frames! ...who has bought...
11-26-2021 12:45 AM

[-]
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. ReapThaWhirlwind
30 posts
no avatar 2. Jesper
21 posts
no avatar 3. jeffg
8 posts
no avatar 4. steven chen
6 posts
no avatar 5. Zviedrs
5 posts