Anyone locate an idler pulley that has the plastic caps that you can pop off and grease bearing? Seems BB 4.75” is odd size and the caps are metal and not removable. These don’t seem to last long and $21+ adds up long term.
When it comes to modern idlers there are only 3 dimensions to worry about
1) diameter at the rim
2) diameter at the drum
3) width between the rim
All of the others are done with the bush that is pressed into the center
So you press the old one out, then supporting the inner race so you don't dent the race, press the old bush into the new pulley
This is why in the page below, the main page only shows 3 dimensions , OD, ID & height
So if you want some one here to dig out replacements we need these sizes
4 3/4" idlers
In the catalogue pages above, the photo is the actual pulley so if the seal is Black, Red or blue then they are plastic dust seals
If it is silver then it is a metal ( Z ) debris shield .
If you click on the "more tab" you will get the full dimensions & a line drawing
The line drawing is a lie, all of them have a std 6000 series deep groove ball bearing, not a bespoke double row bearing .