I can "kind of help"-
Click on- Illustrated parts diagrams....
Click on- Click Here for.....
Select Electrolux home products from the menu on the upper left.
Pick one in which the last 2 numbers of the model# are 54.
There are 2 choices.
The bad news is these 2 are equipped with Briggs, but you'll find MANY of the parts are the same# on the rest of the tractor.
You can compare diagrams vs Sears.