Well, my thanks might be for naught as it seems I've led you astray. I should have engaged my brain first and realized that elsewhere I had stated I used 1/8" packing on my 3/4" shaft. All things being equal, it doesn't seem logical that a 1" shaft would use the same unless the the nuts/clearances are smaller. I agree, that measuring what you have (if it doesn't come out as dust like mine) is your best bet.Thank you Dave!
There are a few misprints in Ericson owner manuals. I think this is one o fhem. They seem to have given the transmission capacities wrong (the Hurth 50 uses 300ml of AT fluid not 550) and I think this is another error. Most 1" shafts with standard packing glands use 1/4" packing material. I have used 3/16" on a few with success. The key to to this is making absolutely sure you have removed all the old packing. I suggest making a tool for this because the commercially produced tools do not work well on the 1" shaft glands. A stiff wire with a hook on the end is an option. I made one out of one of those very small screw driver sets that works well. I recommend buying some Syntec grease and seating each ring before installing the next one. FWIW