Originally Posted by
manicmike
My Singer 498 has nylon gears and manual said to grease 'em (which I do).
EDIT: Here's the info from the manual (for flat bed version, 478)
[ATTACH=CONFIG]454869[/ATTACH]
I would always follow the manual. Greasing nylon gears can be a controversial subject, as there are those that have strong opinions on it. I, personally, don't grease nylon gears but if they've already been greased, I clean them as well as possible and then add Triflow grease. Some will say it's fine, others will say it will attract lint, junk and "stuff" that can cause the gears to crack or the grease itself will cause the nylon gears to break down. I figure if the gears have already been greased for 20-30 years, any possible damage has already been done...