Viagra 4700 left lever stuck

For discussions about bikes and equipment.
sirmy
Posts: 594
Joined: 11 Mar 2009, 10:53am

Viagra 4700 left lever stuck

Postby sirmy » 20 May 2018, 9:44am

Just got a nice new shiney bike with a Viagra group set on it. Took it out this morning, short hilly ride to a local ATM. I decided to check the gears so clicked through all the combinations with no problems. On the way I changed down on the front for a hill and back up at the top no problem. At the foot of the next hill I go to change down and the lever swings across with no resistance and no click. I then tried the up shift, a lever, the lever won't move out of the line of the lever hoods.

When I got home I checked the cable alignment, all looks fine. I released the cable and the detailed changed down to the small ring. The up shift lever still has limited movement and the down shift swinging with no clicks. I've tried pushing the cable back through the over but I'm sure the lever needs to be in a certain position for installation / removal of the cable so I think it probably in the wrong position.

Has any one had a similar problem , it appears to be quite common, and if so is there a solution short of taking it back for a replacement lever to be fitted? :(

sirmy
Posts: 594
Joined: 11 Mar 2009, 10:53am

Re: Tiagra 4700 left lever stuck

Postby sirmy » 20 May 2018, 10:02am

"Viagra group set"! Gotta love auto correct, should be Tiagra of course

Vorpal
Moderator
Posts: 17750
Joined: 19 Jan 2009, 3:34pm
Location: Not there ;)

Re: Tiagra 4700 left lever stuck

Postby Vorpal » 20 May 2018, 10:06am

sirmy wrote:"Viagra group set"! Gotta love auto correct, should be Tiagra of course

I had a laguh when I saw the title. You can correct it with the edit button? Or perhpas, you'd rather leave it. :lol: :lol:
“In some ways, it is easier to be a dissident, for then one is without responsibility.”
― Nelson Mandela, Long Walk to Freedom

the snail
Posts: 155
Joined: 5 Aug 2011, 3:11pm

Re: Viagra 4700 left lever stuck

Postby the snail » 20 May 2018, 10:20am

Wait a while and it'll wear off and the stiffness will subside. :lol:
Seriously if it's a new bike, I'd take it back to the shop - that's what you pay for buying new.

Brucey
Posts: 36851
Joined: 4 Jan 2012, 6:25pm

Re: Tiagra 4700 left lever stuck

Postby Brucey » 20 May 2018, 11:04am

sirmy wrote:"Viagra group set"! Gotta love auto correct, should be Tiagra of course


I wondered if this was the right forum for that kind of thing.... :wink:

But from your description you have released the cable through the pinch bolt on the mech? If so the gears will be now be out of adjustment.

The probable reason the upshift lever won't move is that the internal mechanism is already as far as it will go.

The reason the downshift lever does nothing is most probably that there is a sticky pawl in the mechanism, that isn't latching with the downshift mechanism. There are many possible causes for this but a very common one is that the shifters need a squirt of fresh lube because they have dried up inside.

Anyway unless you are able to fix the problem with the shifters yourself and then readjust the cable correctly (if you have indeed moved it in the RD) a trip to the shop where you bought it is in your future.

cheers
-------------------------------------------------------------------------------
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

peetee
Posts: 1686
Joined: 4 May 2010, 10:20pm
Location: Cornwall

Re: Viagra 4700 left lever stuck

Postby peetee » 20 May 2018, 1:00pm

Check the outer cable where it fits into the lever. If its a cheap alternative housing it could have delaminated and the metal strands are on their way past the end cap and heading destructively towards the shifter mechanism.
Current status report:
Back on two wheels in deepest Pastyland and loving every minute. Mission: to enjoy big, bad hills again.

tim-b
Posts: 1159
Joined: 10 Oct 2009, 8:20am

Re: Viagra 4700 left lever stuck

Postby tim-b » 20 May 2018, 2:19pm

Hi
Operate the smaller lever at least 10x
Peel the rubber hood forward, there's a cover on the outside of the STI body that you can (gently) lever open with a flat-bladed screwdriver
The gear cable sits in a keyhole-shaped slot, it needs to be fully seated so that it engages with the lever. You might need to undo the cable clamp at the derailleur and fiddle about to get the cable right. Keep tension on the cable and clamp it back up (about 5Nm from memory)

Or pop it back to the shop

Regards
tim-b
~~~~¯\(ツ)/¯~~~~