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Right Shimano Tiagra Shifter Alignment Problem

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Right Shimano Tiagra Shifter Alignment Problem

Old 12-03-23, 04:18 PM
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Right Shimano Tiagra Shifter Alignment Problem

So I have set of Shimano 9 speed Tiagra shifters. Model ST-4400. The right side shifter sits in a resting position with the lever further out than that of the left. Also requires a touch inward on the big lever to get the small lever to function properly. Goes through all gears. I was going to take it apart and fix this if possible. I have rebuilt 2 sets of RSX shifters so am ok doing that. However, they did not have this issue. Does anybody know why the right side lever is out of alignment like this? I would like to know, if possible, before disassembly. I have already sprayed lubricant daily and worked it for 2 weeks. Thank you.




Last edited by Jicafold; 12-03-23 at 05:35 PM.
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Old 12-03-23, 04:47 PM
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2 things seems possible, it appears that something is being used between the top of the housing and the inside of the bracket to shorten the brake lever reach which is sitting at an angle.

The screw attaching the brake lever to the shifter unit may be loose/missing. The screw with the hex outer surface in this pic. BTW this pic is a left unit.

That's what I see...

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Old 12-03-23, 05:24 PM
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I checked that screw already. It is in place and was snug. I'm not sure if there is a spacer to shorten the reach on this model. I'll have to check.
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Old 12-03-23, 08:17 PM
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I can take a picture, but I am looking at a set of 4400 right now. They look like the above pictures, both sides. I have owned these they came new on a 2006 Schwinn SS DBX. I no longer have the bike but these are stashed in a cabinet. Still operate just fine.
If you look at the levers from the front while operating them, you see how much more the right lever, 9 gears/8clicks, has to travel, compared to the left. I am guessing the right lever needs to be a bit offset to keep the reach reasonable for the lever throw, maybe a bit aesthetics. Likely, there are nuances between right and left with all models

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Old 12-03-23, 10:02 PM
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Originally Posted by Jicafold
I checked that screw already. It is in place and was snug. I'm not sure if there is a spacer to shorten the reach on this model. I'll have to check.
OK, you're right, there is a step in the area that the shifter housing rests against the bracket. The 105/Ultegra 9 speed which I am more familiar with doesn't have that step on the bracket.
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Old 12-04-23, 02:48 AM
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Originally Posted by delbiker1
I can take a picture, but I am looking at a set of 4400 right now. They look like the above pictures, both sides. I have owned these they came new on a 2006 Schwinn SS DBX. I no longer have the bike but these are stashed in a cabinet. Still operate just fine.
If you look at the levers from the front while operating them, you see how much more the right lever, 9 gears/8clicks, has to travel, compared to the left. I am guessing the right lever needs to be a bit offset to keep the reach reasonable for the lever throw, maybe a bit aesthetics. Likely, there are nuances between right and left with all models
Shouldn’t have to hold the big lever in to get the small to operate though. And I’ve never seen any other Shimano shifters with that big a difference though never had any Tiagras.
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Old 12-04-23, 07:26 AM
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Originally Posted by choddo
Shouldn’t have to hold the big lever in to get the small to operate though. And I’ve never seen any other Shimano shifters with that big a difference though never had any Tiagras.
It seems to work that way when holding them in my hand. Truth be told, I haven't threaded a cable through it yet and hooked it up to check actual operation on the bike. I only got as far as mounting the levers and noting the offset difference. I will do that today. Maybe they will function okay with a cable and derailleur tension and maybe the offset is just on the right side due to the number of speeds as was said above. I have had these shifters before and don't remember them looking like this, Thank you.

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Old 12-04-23, 07:48 AM
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I sincerely doubt that they are designed to be this way.

You should check to see if they function normally, but offset. Or if the lever must be moved until it is in the normal position before it starts shifting.

The first would indicated the shifter has moved on its mount to the lever body. The second would indicate an internal problem with the shifter mechanism.

I'm not super familiar with these, but my guess is that the mechanism is loose on the shaft it rotates around, explaining how it got out of position and why you need to pull the brake to engage. Good luck.
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Old 12-04-23, 07:51 AM
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Thank you. I will hook them up with a cable after work today and see how it functions. If all is not well I will disassemble.
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