How many miles Larry?
The chain is rolled in from the top, with just the top cover removed. It is crimped with the same tool but with an added fixture for the single roller chain.
Unless you know the rail to be badly worn or if you are over 200k I wouldn't worry about the lower rails The only time I've seen problems here is when someone lets the chain loose on the slack side and the rathcheting chain tentioner comes out. If this happens the tentioner must be removed, disassembled and reinstalled to its spring loaded extent. If the tentioner gets out it can make the chain so tight that the cam can break.
Does anybody know if image files can be loaded to this site? A picture is (as they say) worth a thousand words even if it takes a books worth of server space.
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician