I'm changing the tires and other parts on a bike belonging to a friend of mine. It's an inexpensive, single-speed Holland bike. While removing the rear wheel, the chain came off of the front gear. I don't know how to get it back on. It's silly and irritating. I think the case is meant to make it so that the chain stays in place and requires no maintenance--unless the chain falls off. But when the chain comes off, it's not easy to put it back on.



I've been trying to remove the chain case to get at the chain and front gear. There are two small screws that hold the chain case in place at the back end. I removed them, but it's still attached at the front end. There aren't any other screws. I suspect that either I have to remove the pedal cranks, or the metal case is simply crimped together. I've tried prying it apart, but I'm worried that it's actually welded together. If I separate the two metal pieces that make up the case, I won't be able to get them back together.

Does anyone know how I can get the chain back on, or how to take apart the chain case? Thanks in advance for any good advice.

-Russell