If a hangar airplane - fly on.
Carl
How do you change the grease in the hub? I wasn't aware of changing only adding 4 pumps or if grease comes out of the other port?
The Hartzell Owners Manual states in part:
B. Lubrication Procedure
WARNING 1: FOLLOW LUBRICATION PROCEDURES CORRECTLY TO MAINTAIN AN ACCURATE BALANCE OF THE PROPELLER ASSEMBLY.
WARNING 2: PITCH CONTROL DIFFICULTY COULD RESULT IF THE PROPELLER IS NOT CORRECTLY LUBRICATED.
(6) Pump 1 fl. oz. (30 ml) grease into the fitting located nearest the leading edge of the blade on a tractor installation, or nearest the trailing edge on a pusher installation, or until grease emerges from the hole where the fitting was removed - whichever occurs first.
NOTE: 1 fl. oz. (30 ml) is approximately 6 pumps with a hand-operated grease gun.
(7) Reinstall the removed lubrication fittings. Tighten the fittings until snug.
(a) Make sure that the ball of each lubrication fitting is properly seated.
(8) Reinstall a lubrication fitting cap on each lubrication fitting.
Apparently the hartzell procedure was the way it had been done before I bought the aircraft. My mechanics flushed the whole system on my first ci and showed me how dirty the grease gets. It was pretty nasty the first time, but every year you can still see a big difference. I would love to hear from other guys on this procedure since it differs from what is stated above.
Beg your pardon...but you're rather hear from a bunch of guys you don't know on teh internet versus the engineers that built your prop? This has been discussed many, many times in the light airplane world, and while you'll hear all sorts of different ideas in hanagr flying discussions, Hartzell has never changed their position. I think I read that if you try to flush the whole prop, you have a chance of blowing a seal - but that's just something I heard, and don't know if it is right - so I'd ask Hartzell why they recomend what they do.
Props are one thing I never mess aroudn with - a failed blade is likely the end of you.
Paul is dead on here. The manual clearly states to put grease in it until it comes out the other side, using no more than 6 pumps. Been doing it that way for years on LOTS of airplanes.
Having just lost a dear friend to a blade failure it really hits home.
Following the manufacturer's recommendations is highly recommended when it comes to critical flight safety items on an airplane.
Vic
Following the manufacturer's recommendations is highly recommended when it comes to critical flight safety items on an airplane.
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Than why aren't we all overhauling our Lycoming's at 12 years then?![]()
I agree.
Every new prop. that Hartzell ships includes an owners manual.
It describes the recommended lubrication procedure in detail.
Pump until you hit 6 pumps or grease exits opposite hole, which ever comes first. There is also a spec for which direction you pump in the grease depending on whether it is a tractor or pusher installation.
We have to do 100 hr inspections on all of our company airplanes so this gets done every 100 Hrs. It is rare that we go past 4 pumps.
So my question is, Where does the 4 pumps of grease go (get consumed) every 100 hours?