Question about Shimano Shifter Pods 3x7 Shm Bicycle Parts

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Large trigger has to sit for a while befor it will engage. Derailleur does move when it does engage. You get one pump and then you wait. This bike has been sitting for 3 years unused.

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  • blaf11 Jul 25, 2010

    When I say engaged, I mean it will move the deraileur up a gear. Until it "engages", the trigger moves freely but does nothing with the derailleur. Wait a few minutes and it will give you one push and then it is free -not engaged-again. I've squirted Triflow into trigger mech to no avail.

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If you mean the derailleur doesn't move straight away when you move the gear trigger it's likely that the derailleur needs cleaning and oiling. As the bike hasn't been used for 3 years also oil the chain, check that the cable pulls the derailleur far enough. if it doesn't there the cable may need to be tightened. If the derailleur is not going back out far enough there's an adjusting screw which sets the limit. this may need adjusting.

Posted on Jul 17, 2010

  • Joe Bannon Jul 26, 2010

    It sounds like the cable might be sticking sticking. If you've oiled the the trigger mechanism and the derailleur it's the only thing left. Try removing the wire centre from the cable and see if it's rusted or if it moves freely. When the cable is disconnected from the derailleur check that the derailleur moves freely in and out. If not it needs cleaning and oiling. The spring in the Derailleur puts the pressure on the cable which in turn puts pressure on the trigger so it's a matter of tracing where the pressure is being stopped.

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1 Answer

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Too little information. Does the shift lever not move, does it move but the derailleur does not, or does the derailleur move some but does not reach all gears? If the last one is it the small or large rear gears that you can't get?

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

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You can't have end-to-end intact cable movement and NOT move the derailleur unless it is NOT tight to begin with. Look closer.

You need to figure out at which end the problem lies.

You can elevate the rear wheel (or hang the bike by the tip of the seat on a low branch) and pedaling it forward with your hand you can grab the bare exposed cable somewhere in its routing (usually along the down tube) and pull sideways on it (away from the bike) to see if the derailleur moves as expected when the cable REALLY moves. Then you can decide if the shifter is or is not controlling the cable.

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or use a search engine "how to...." for videos.

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My shimno sora front derailler shifts perfectly to the small and large chain set cogs, but on the middle, the chain rubs along the cage.


Set the rear derailleur to the lowest gear (big cog) and the front to the lowest gear (small chain ring). Disconnect the derailleur cable. Screw in the adjuster for the cable tension all the way (this adjuster is on the shifter of a mountain bike or the down tube of a road bike). Pedal to make sure the chain is not rubbing on the derailleur cage. If it is, adjust the "L" setting on the derailleur until the chain moves by without touching the cage. Now pull taut and reattch the cable and shift the front to the big ring while pedaling. If it does not shift up well or completely, hold the shifter past its normal shift and adjust the "H" screw so that the derailleur allows the shift. Shift into the highest cassette gear and keep pedaling. The chain should not be touching the front derailleur's cage when you pedal. Adjust with the barrel adjuster until the chain moves freely without touching the derailleur cage.

i hope this helps
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1 Answer

Problem with chain and gears


Wash, degrease and scrub the chain and derailleurs with a good degreaser (like Simple Green). Dry the chain and relubricate it with an appropriate bike chain lubricant (not oil or WD-40). Shift the derailleurs to the smallest chain ring and cog on the cassette (low front gear, high rear gear) and then loosen the cable at the derailleurs, pull the cables taut and reattach them. If the derailleurs still need adjustment, here is a procedure for it:
Flip the bike over (so you can pedal the bike manually while you shift) and shift the front to the middle chain ring. Shift the rear to the highest gear (small cog). Release the cable from the pinch bolt on the derailleur. Adjust the screw marked "H" on the derailleur until the jockey wheel on the derailleur is aligned perfectly over the small cassette cog. Set the cable adjuster on the derailleur to the middle of its range (find this by screwing it all the way in and then count how many revolutions it makes until it screws out completely. Screw it back in one half of the total revolutions). Reattach the cable and shift to the lowest gear (the biggest cog). Over-shift and hold on the shifter, then adjust the "L" screw on the derailleur until the jockey wheel sits just past the last cog. You have to hold the shifter to do this. Now shift into the middle gear (or one of the two middle gears if the bike has an even number of gears) and adjust the derailleur using the barrel adjuster you previously set to the middle of its range. Adjust it so that the derailleur is sitting perfectly over the appropriate gear. Shift up and down the cassette while pedaling and in every gear, reverse pedal (freewheel) to make sure the chain does not hop. Adjust as necessary until all gears are smooth.
Now the front:
Set the rear derailleur to the lowest gear (big cog) and the front to the lowest gear (small chain ring). Disconnect the derailleur cable. Screw in the adjuster for the cable tension all the way (this adjuster is on the shifter of a mountain bike or the down tube of a road bike). Pedal to make sure the chain is not rubbing on the derailleur cage. If it is, adjust the "L" setting on the derailleur until the chain moves by without touching the cage. Now pull taut and reattch the cable and shift the front to the big ring while pedaling. If it does not shift up well or completely, hold the shifter past its normal shift and adjust the "H" screw so that the derailleur allows the shift. Shift into the highest cassette gear and keep pedaling. The chain should not be touching the front derailleur's cage when you pedal. Adjust with the barrel adjuster until the chain moves freely without touching the derailleur cage.
That should be it, unless there is another mechanical problem causing the missed shifts, like a bent derailleur hanger or damaged teeth on the cassette cogs or a bad derailleur. If it is still problematic, come back for further information.

i hope this helps
-matthew

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1 Answer

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