Gears and derailleur misalignment

[chascoop]

       

Although I have ridden bikes on and off since a kid (75 years old now), I have very little experience with anything other than a single speed bike.

I recently purchased a new 7-speed Gospel adult tike, which needed assembly. My wife has the same model trike but older and purchased second hand, so I figured to use it as a reference. Gospel has no (0) customer support, which I was not aware of.

My problem, rear gears and derailleur misalignment. I watched several YouTube videos but the methods did not appear to work. After checking my wife's trike, I found the problem. The gears were mounted from the factory in the wrong location. Too far inboard. I loosened the lock ring attached to the gears but cannot move the gear assembly.

My question... Do I need a special tool? Do a use something to tap on the gearing s=assembly? I'm concerned I may damage the gears by forcing the assembly. I've included 2 photos. One of my wife's trike which you can see has very little gap between the assembly and wheel. The second, which shows my trike and the large gap between the assembly and wheel.

Any advise and assistance will be appreciated.