I am the original owner of a Glacier Bay insert that I purchased in 1980.  I absolutely love it and it has kept my home warm for the past 29 years.  I have all the original paperwork but unfortunately it does not show the grate shaker bar on the drawings.  I am having a problem with the connector bar for the 5 shaker grates.  It fell off last week and when I looked underneath I thought it was free floating between the 5 grate bars with the center grate being the balance where it just sits on the pin on the grate bar without cotter pins or anything else securing it.  I repositioned it on the center grate with the alternating side grates positioned on the remaining 4 pins.  I shook it several times and all the grates seemed to work perfectly in unison.  I started the fire up again and when I went to shake the coal down the bar fell off again.  Anyone have any ideas?  Thanks