Showing posts with label limit screw. Show all posts
Showing posts with label limit screw. Show all posts

Monday, February 24, 2025

The problem with the Wheeltop not shifting at FD for large chain ring is mechanical; we thought it was apps

Wheels of Happiness




While the mechanic was able to fix the large cog not shifting, the shifting to the large chainring ensued.   However the signal then was weak and then decided that we defer the fixing of the problem.

However when we went to the apps, it said, the large guide must be 0.10 mm inside distance to the chain.  However the adjusting limit screw was to its limit.

Can increasing the length of the limit screw be the solution?  Let us see

Thursday, September 5, 2024

Worked the whole afternoon getting my TI MTB in tip top condition.

Wheels of Happiness

On my bike ride to Wawa, I noticed the shifting to be hard.   The headset problem has been solved.  Now its the time to look after the drive train.  These were the things I did:

1.  First, this post disassembled and soaked the rd and fd in degreaser and cleaned them well.  Then the oiled the pivot points.  However I could not get the main spring have the proper tension.   I could only get
the cage to 90 degrees vertical not at horizontal.  Therefore the chain was slack  II tried a dozen times to get the tension of spring back.

2.  I researched at YT and found out that I have to rotate the cage clockwise by at least 180 degrees.  This I could not do since I observed the part that attaches to the cable gets into the way.  (You will be surprised that I was not thnking outside the box.  )  It looked immovable.  The only way out is to move the spring by other means.   I gave up on my DIY and went to the bike mechanic,   He proposed creating a tool to rotate the spring.  Later on he found like solving a puzzle that the parrallelogram can be moved and the cage can be rotated 180 degrees.  Voila.  I gave him P50.00 for the effort.

3.  Then I found out that the cable inside was rusted.   So I had to replace the outer too.   And so I looked for  full length shifter cable and I found one.  My waterloo there is inserting the cable at the changer.   I entangled a cable before.   I had smooth sailing this time.   I replaced the outer at the last 20 cm portion of the cable near the RD.

4.  It took me 4 tries to get the cable to the right tension.  And I had to adjust the limit screws.  The bike would not shift to the biggest and smallest gear.   

5.  Then the rd would not shift back to the lowest gear.  I found out that the upper pulley was hitting the chain stay.  So thats where the B screw adjustment came in.  I scewed in the B screw to clear off the chain stay.   


Perfect.  Now the Ti MTB is a Ok.   But was tired.   Finished at 7:00