Is any slop permitted in idler pully?

[donphillipe]

I couldn't figure out the search terms to try to find this answer. I have removed my belts from a 90 FJ62 with 220K miles and I notice that both idler pulleys can be wiggled from side to side about 1/16 of an inch. Should I replace these or is this normal?

 

[donphillipe]

I'll guess the answer

There was about 1/16" side to side wiggle of these idler pulleys after I removed the belts so I removed the pulleys for inspection. I found the closest fitting drill bit and wrapped around it aluminum foil to shim it tight into the center of the bearing. If found no play there whatsoever and a smooth feeling rolling action as I spun the outer wheel on my newly constructed but temporary shaft. I made an executive decision and now since I am an expert at changing belts, it won't be a big deal to just let them go as long as they desire and not waste any money that isn't necessary.

By the way, the play in the wheel is from the rod that goes through the bearing being a little smaller. Not sure the tech specs on this but again, I'll leave it until I hear it start to rattle. I may go ahead and throw a replacement bearing in my tool box for the next trip down south.

 

[haryv]

radial or axial play

There are two kinds of play in a bearing. One is axial one is radial play or a combination of both. Radial play is when you can move the bearing perpindiculr to the shaft it is ridding on. Axial play is moving the bearing paralell "side to side" in relation to the shaft it is riding on.

Generally, you should have no play. Also, a good indicator to replace the idler is to free spin it. A good greesed bearing will cause the pully to slow to a stop really quickly. If it free wheels, then the bearing is dry and pully needs to be changed.