Shimano 3 speed hub Adjustment ?

[echotraveler]

Hello friends,
ive been riding my new Worksman LGB for 2 days now, pretty nice ride! very heavy, but gets very nice cruising speeds, can't handle slopes very well but when the motor is in, its gonna be ok.
so heres the deal, the bike has a 3 speed nexus hub, and it worked great the first day, but yesterday it started jumping from 2nd to 1st gear....when i put 2nd gear it sort of go's to neutral and then feels like 1st gear. and then go's back to 2nd and so forth....
i would think i need to adjust the little horn that sticks out of the hub, but i cant find the manual on the net, and people only talk a bout the 4-speed and up...
i'm thinking that i wrong it somehow, when i did the main voyage, i went to a park and took the bike off road, wanted to try a small (super small) slope, and changed from 3rd to 2nd to 1st in while pedaling, it made a "clank"sound! it sounded as if the sprocket had slipped (my old bike did it when i put torque on it, so thats why i thought of that), but its not supposed to slip since its new.
so do you guys think i can fix this?

[DaveM]

Go to: http://techdocs.shimano.com/techdocs/index.jsp<br />
Click on the Comfort&gt;Nexus section<br />
Scroll down to Internally Geared Hubs.
Not sure exactly which one you have, but it looks like there's several manuals there.