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Grease for an annual. Which type?

isaacpr7

By isaacpr7
in Vintage Mooneys (pre-J models)

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isaacpr7 Proficient

isaacpr7

Posted
Posted

I will place an order for grease so that I can lube the aircraft during the annual. I spoke to spruce and they recommended aeroshell #5 for the wheel bearings. Does the rest of the aircraft use a different type or can I use the same? Also, is there a different number for the prop? Spruce could not answer this question and I would like to have the order placed before starting the annual. I searched the service manual and could not find it there.

Hector Veteran

Hector

Posted
Posted

I will place an order for grease so that I can lube the aircraft during the annual. I spoke to spruce and they recommended aeroshell #5 for the wheel bearings. Does the rest of the aircraft use a different type or can I use the same? Also, is there a different number for the prop? Spruce could not answer this question and I would like to have the order placed before starting the annual. I searched the service manual and could not find it there.

PM me and I'll send you my spreadsheet of consumables for the annual inspection.

MB65E Grand Master

MB65E

Posted
Posted

Check the prop hub itself and logs for a service sticker. A lot of newer prop overhauls are using Aeroshell 5...

Currently, On the wheel bearings I've been using synthetic mobil SHC-100. Most larger aircraft wheels are using this now so I'm set up in the shop with it. I've uses Aeroshell 5 for the wheel bearings in the past. Lasar has the premix Aeroshell 7 and molybdenum for the gear actuator if your electric.

-Matt

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RangerJim Contributor

RangerJim

Posted
Posted

San Antonio Propeller Service advised me that Aeroshell 5 and/or 6 are okay for the "B" prop hub and and mixing the two is not detrimental.  Get expert advice on how much to pump in and the correct procedure.  Not even one complete stroke on the grease gun as I recall.  I'm advised that too much grease risks internal seal damage.  Resolve any conflicting advice by calling the facility that last overhauled or inspected your prop hub and follow their recommendations.

 

It's great to see owners making sure that their planes receive proper lubrication - imho the single most positive maintenance procedure we can perform under the FAR's.

Hector Veteran

Hector

Posted
Posted

Check the prop hub itself and logs for a service sticker. A lot of newer prop overhauls are using Aeroshell 5...

Currently, On the wheel bearings I've been using synthetic mobil SHC-100. Most larger aircraft wheels are using this now so I'm set up in the shop with it. I've uses Aeroshell 5 for the wheel bearings in the past. Lasar has the premix Aeroshell 7 and molybdenum for the gear actuator if your electric.

-Matt

Good point. My Hartzell prop manual says Aeroshell 6.

BigTex Mentor

BigTex

Posted
Posted

Isaac, In the Maintenance and Service Manual there's a chart (figure 2-9 in my manual) that shows what lubrication you should use on various components.  That chart is a full three pages long.  Also, there's a thread entitled "Lets Talk Lubrication" that covers it in great detail.

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isaacpr7 Proficient

isaacpr7

Posted
  • Author
Posted

Isaac, In the Maintenance and Service Manual there's a chart (figure 2-9 in my manual) that shows what lubrication you should use on various components. That chart is a full three pages long. Also, there's a thread entitled "Lets Talk Lubrication" that covers it in great detail.

BigTex,

I found the figure you were talking about in my book (figure 2-2). At the end all it points to are properties the lubes should have and some mil spec numbers for others. I have a 68C so maybe they where a bit generalized back then on the books. I think I will be safe going with what I have been suggested on this thread so far. Thanks a bunch for adding to my knowledge database ;)

I will also check that other thread you mentioned. The more I learn, the better ;)

Cody Stallings Experienced

Cody Stallings

Posted
Posted

#5 or #6 for the propeller is fine. If the propeller has Anti-ice Boots, #6 only.

Servicing the Hartzell Y shank Propeller, is very straightforward. However, if a few steps are overlooked you will be headed straight to your nearest Propeller Repairstation

#1 Each propeller blade has its own bearing pack, which is segregated from the others. On each side of the blade there is a greese fitting. One of these fittings have to be removed in order to let air an greese out, as you pump it in the opposite side.

#2 When you remove the fitting use a toothpick or a piece of .041 wire the clean out any hardened greese.

In the winter time I prefer to just add a couple pumps. Very slow pumps.

In the summer time when the temp outside looks a lot like your CHT/EGT I will slowly purge all of the old discolored greese out. But you wanna be really careful. You want the greese to come out of the opposing side of the hub at a rate of 1 to 1. If it stops coming out, an your still pumping it in, then your filling the center of the hub with greese, or pushing it past the blade Quad seal...

Hope this helped you.

  • Like 1
isaacpr7 Proficient

isaacpr7

Posted
  • Author
Posted

#5 or #6 for the propeller is fine. If the propeller has Anti-ice Boots, #6 only.

Servicing the Hartzell Y shank Propeller, is very straightforward. However, if a few steps are overlooked you will be headed straight to your nearest Propeller Repairstation

#1 Each propeller blade has its own bearing pack, which is segregated from the others. On each side of the blade there is a greese fitting. One of these fittings have to be removed in order to let air an greese out, as you pump it in the opposite side.

#2 When you remove the fitting use a toothpick or a piece of .041 wire the clean out any hardened greese.

In the winter time I prefer to just add a couple pumps. Very slow pumps.

In the summer time when the temp outside looks a lot like your CHT/EGT I will slowly purge all of the old discolored greese out. But you wanna be really careful. You want the greese to come out of the opposing side of the hub at a rate of 1 to 1. If it stops coming out, an your still pumping it in, then your filling the center of the hub with greese, or pushing it past the blade Quad seal...

Hope this helped you.

Cody,

That explanation was amazing. Thanks for taking your time to spell it out for me. I remember doing this on the last annual but did not know why. I was just doing what the MX at the time told me. It is important to me that I learn why things are done the way they are. Hopefully one day, after I retire from the Army, I can become an A&P as well. Owning a Mooney and having access to such a great group of mooniacs has made my first owner experience as good as can be ;)

#5 or #6 for the propeller is fine. If the propeller has Anti-ice Boots, #6 only.

Servicing the Hartzell Y shank Propeller, is very straightforward. However, if a few steps are overlooked you will be headed straight to your nearest Propeller Repairstation

#1 Each propeller blade has its own bearing pack, which is segregated from the others. On each side of the blade there is a greese fitting. One of these fittings have to be removed in order to let air an greese out, as you pump it in the opposite side.

#2 When you remove the fitting use a toothpick or a piece of .041 wire the clean out any hardened greese.

In the winter time I prefer to just add a couple pumps. Very slow pumps.

In the summer time when the temp outside looks a lot like your CHT/EGT I will slowly purge all of the old discolored greese out. But you wanna be really careful. You want the greese to come out of the opposing side of the hub at a rate of 1 to 1. If it stops coming out, an your still pumping it in, then your filling the center of the hub with greese, or pushing it past the blade Quad seal...

Hope this helped you.

isaacpr7 Proficient

isaacpr7

Posted
  • Author
Posted

No problem. Was trying to get you some pictures, but don't look like its my night to upload pics....:( sorry

Lol! No worries. Maybe I can get them from you some other time. I am building a maintenance book for my Mooney that includes indexed content with a printed copy of the service manual, all service bulletins, all service instructions, and all ADs. This way my MX will have everything organized right in front of him. The logbooks will also be attached in order.
isaacpr7 Proficient

isaacpr7

Posted
  • Author
Posted

Found this on the prop manual attached to the prop logbook.

I also looked at SB 159 and the limitation has do do with operating at extreme low temperatures of -40F and below due to hardening of the grease and loosing full feathering capabilites.

post-11848-14190434133699_thumb.jpg

Cody Stallings Experienced

Cody Stallings

Posted
Posted

Just my opinion, I would stick with the Aeroshell products. I would use the #22 for the undercarriage. Not very familiar with #7. 5&6 are what your looking for......

  • Like 1
Andy95W Grand Master

Andy95W

Posted
Posted

My prop uses Aeroshell #5, as stated on a placard on the hub. Guess what I use on the landing gear? Yup, #5, and it works great.

One tube does the whole airplane with a little left over. If my prop used #6, I'd put that on the gear.

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