A thin, brown streak of lube was applied originally. This turns into resin, sticking up everything. Greases 
IMG_1793 (resized).JPGat that time were based on wax, or certain proprietary mixtures with various petroleum derivatives, or later, Polymers. Silicone began to be added to grease in the late 50's, but it was expensive. Most of the early lubes were wax based and as the petroleum distillates dried out turned into a hardening resin.
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I apply a small amount of Dow Corning 1292 silicone grease to the cog wheel, very small.
Quoted from ryan1234:I also use a very SMALL amount of grease.
I use Super Lube.
They put grease in this area at the factory when made.
Quoted from dmarston:Gottlieb said to use their "black lube" there. I actually ordered a tube of it (1 ounce, but goes a long way) from my Gottlieb distributor back in the day. I'd like to know the hardware-store equivalent product.
.................David Marston
Any black lube will contain Graphite, or Molybdenum, The Former is primitive but very effective in certain dry applications, the Latter and exceptional additive for this application. Silicone-based greases containing Flourosilicone or Teflon, as most know it, are the best.
