Enclosed chain guard ?

[harrytrux]

I repair and refurbish bikes for a church bike giveaway, a bike was donated with an enclosed chain guard. The chain has come off the main sprocket and I can't figure out how to get the chain guard off to replace the chain. Is there some way to replace the chain without taking the guard off?

 

[Sharky]

Photo?
Can you break the old chain somewhere, then connect the new chain to the old with a link or just tied somehow, then pull the old chain through, pulling the new chain behind it?

 

[Dogtrousers]

A photo would be useful, but as a new member you might have trouble posting photos until you have made a few posts elsewhere. You have to prove your ability to post lots of inconsequential nonsense before the forum gives you full privileges

 

[midlife]

There are normally two sliding covers that allow access to the chain wheel and cog. Can take a bit of finding, the cog one usually slides backwards from the end, the chain wheel one on the inside near the BB.

 

[tyred]

If it's the usual Raleigh type, you will need to feed it through from the back. There is usually a small flat headed screw at the back to remove the rear section. The cover for the chain wheel behind the cranks will pop off like a paint tin lid.

You will need to find the joining link with the circlip to split the chain.

If you can hold the back of the bike up , it would make it easier to feed the chain to the front.

An old spoke is useful to hook the chain and and pull it.

If it's only just come off, you might be able to put it back on again with a knife or flat screwdriver once you have the front cover off. Make sure it's in at the back and then get into position in a few teeth on the chain wheel and then turn it so it pulls itself on.