Here is a picture from a few months ago, before this Home Depot Ryobi electric 8-inch chain saw (pole saw, pole pruner) broke:
We had used it on chapparal and on a treehouse limbing project:
We think we stripped the screw insert hole as the chain won't stay and the tightening screw spins loosely now:
Do you think that might be covered by the 3-year warranty? If not ... Any suggestions for getting an exploded diagram of the parts?
Note: I'm not the owner, so, I don't have the model number of the saw offhand; I'm just trying to help the owner who is inclined to just throw it away for want of a screw thread...
The model is probably this $100 6-amp 8-inch pole saw:
If so, the model number is RY43160A.
Googling, I find it has a 3-year warranty and it is only a few months old, so that's a good start.
I think here is a manual:
Is "ereplacement parts" reputable?
Does this look like the chain adjustment assembly: