[NSRCA-discussion] Neu Gearbox Grease Technique

[Anthony Romano]

Planetary gear boxes just seem to have a certain roughness to them. Load them up and they feel great but then the eject all that extra during the first flight. I just pick an interval and stick with it.


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-------- Original message --------
From: Scott Pavlock via NSRCA-discussion <nsrca-discussion at lists.nsrca.org>
Date: 5/8/21 7:46 PM (GMT-05:00)
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
Subject: [NSRCA-discussion] Neu Gearbox Grease Technique

Hi All,

Just wondering if anyone has any advice about mow much grease I should pack into the Neu gearbox when I do the re-grease?

A few weeks ago I did what I now realize was a light pack of grease. I felt like the gearbox was getting more and more rough over the last couple of flights, so I decided to do another re-grease last night. When I took it apart, it was clear that there was not enough in there from the previous time, so I decided to use quite a bit more grease this time.

After completing it, the gearbox was much smoother when turning the prop by hand so I felt good about it. Then, after the first flight today, the gearbox went back to the more rough feeling gear train when spinning by hand. Is this normal, or should I expect the gear train to feel more smooth for a longer period after greasing? Trying to gage how much grease I should be using each time.

Also, is there a sound or feel that would identify that I need to re-grease? Or is it just best to stick with proactively greasing every 30 flights or so?

Thanks,
Scott Pavlock






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