It is correct to lubricate this?

A

amibumping

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Hi, do you know if a little grease should be applied to that area? The manual says yes, but I've read that it's not good to have grease on the nylon in the bushing area and the metal of the linkage, because AI says that if dirt gets in there, it acts like sandpaper and damages the nylon.

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Thank you!
 
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amibumping said:
Hi, do you know if a little grease should be applied to that area? The manual says yes, but I've read that it's not good to have grease on the nylon in the bushing area and the metal of the linkage, because AI says that if dirt gets in there, it acts like sandpaper and damages the nylon.
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Yes, slop some grease on there, and don't forget your mounting screws. Doing so will reduce the chances of future creaks.

One might argue that grease will attract dust that will act as an abrasive. However, it's well understood that on open bearings, the outside layer of grease acts as a barrier, preventing the ingress of contaminants. It seems that unlubricated bearings might suffer MORE from the abrasive action of dust and dirt.
 
amibumping said:
Hi, do you know if a little grease should be applied to that area? The manual says yes, but I've read that it's not good to have grease on the nylon in the bushing area and the metal of the linkage, because AI says that if dirt gets in there, it acts like sandpaper and damages the nylon.

View attachment 185303View attachment 185304

Thank you!
Click to expand...
Get some grease in there and do as you told! :)

Then once it is all assembled, wipe off all grease that can be seen/felt and keep your eye on it over the next few days. if you see muck accumulating, wipe it off. But the grease that remains will be deep inside where it is needed.
 
If there is a squeak silicone grease would be the best choice. Nylon bushings generally do not need grease. Nylon is naturally self-lubricating because it has a low friction. Many nylon bushings are designed to run completely dry, especially in environments where dust, grit, or dirt are present, as adding wet lubricants can turn them into an abrasive paste that wears down the hardware.

Most standard automotive or mechanical greases are petroleum-based. Petroleum hydrocarbons can cause certain types of nylon to swell, soften, degrade, or become brittle over time.

Silicone grease is chemically inert and completely safe for nylon and almost all other plastics and rubbers. It will not cause the material to degrade.
 
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