I have taken apart the automatic inking system on a Universal 1, cleaned it, and put it back together. Behinh the machine where the threaded rod goes into when ink system is fully open has what appears to be an small oil opening with a red flip lid. There is no oil in it now, but I would like to add some to keep things in order. Should I add SAE- 20 to this or something else? Thanks.
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A proof press resource
This red flip lid is the oil fill hole on the ink motor’s gear box. Below this should be a oil level plug that looks like a bolt. The head may be square or hex and projects out more than nearby bolts. The level is checked by loosening the plug. If oil oozes out you have enough oil. If not, Add SAE 20—even 30 is fine.