Hartzell H1 Prop Governor and IO360A1A

[Mooney-Shiner]

After a couple of years of upgrades (and two deployments), I’m finally close to getting my F through its annual.

My legacy Hartzell H-1 was overhauled by Aircraft Propeller Works (Auburndale, FL) and installed this year.

We recently did a ground run to check the systems. Everything worked great until we began cycling the prop—oil pressure dropped and oil temp rose. We shut down, decowled, and found significant oil loss around the prop governor area. At this point, we suspect the governor was not installed properly, possibly with incorrect hardware or gasket.

I went through the latest Mooney IPC, Lycoming IO-360 IPC, and looked for relevant Hartzell documentation, but found nothing that gives the detail I need.

Does anyone know where I can find a detailed schematic showing the part numbers and an exploded view of how everything is put together—before I start emailing Mooney, Lycoming, or Hartzell?

[MikeOH]

From the Lycoming Engine Manual.  Maybe this will help?

 

 

[Mooney-Shiner]

54 minutes ago, MikeOH said:

From the Lycoming Engine Manual.  Maybe this will help?

 

 

Thank you. I saw this page, but got confused (crayon eating Marine here). I have #16 adapter assy as shown on the schematic. My H-1 mounts to to this adapter assy. Does this mean that GOV mounts to the adapter assy using #29 gasket PN 72053? The schematic shows #29 going to different setup.

Here's not the best photo that I have of my GOV at home. 

[N201MKTurbo]

72053 looks like the correct gasket.

[Mooney-Shiner]

Another view of my governor mating surface. We are planning to attach the gopro and do the ground run to see where is the leak. After that, we will likely rebed the governor with new set of washers and nuts. 

Edited August 13 by Mooney-Shiner

[N201MKTurbo]

I hope you know that the nut isn’t tight and has no washer.

[EricJ]

23 minutes ago, N201MKTurbo said:

I hope you know that the nut isn’t tight and has no washer.

+1, in the first pic the nut attaching the governor to the accessory case closest to the camera is loose and has no washer.   Unfortunately the govenor needs to be removed to put a washer there and replace the other washers, which appear to be one-time-use star washers.

[N201MKTurbo]

2 minutes ago, EricJ said:

+1, in the first pic the nut attaching the governor to the accessory case closest to the camera is loose and has no washer.   Unfortunately the govenor needs to be removed to put a washer there and replace the other washers, which appear to be one-time-use star washers.

If you loosen the nuts to the top of the studs and pull the governor back, you have enough room to take the nuts off one at a time and add the washers. When all the nuts are rigged correctly, push the governor in and tighten them down.

[Mooney-Shiner]

1 minute ago, EricJ said:

+1, in the first pic the nut attaching the governor to the accessory case closest to the camera is loose and has no washer.   Unfortunately the govenor needs to be removed to put a washer there and replace the other washers, which appear to be one-time-use star washers.

 

27 minutes ago, N201MKTurbo said:

I hope you know that the nut isn’t tight and has no washer.

Thank you for all of the great help, guys. We will re-install the proper hardware on it.

Also based on the discussion above the proper gasket from the governor to the adapter is 72053

 

 

or NOT MS9144-01 or NOT 69551  type (IO-360 IPC is confusing on this)? 

[N201MKTurbo]

I always used the expensive one. MS9144-01

[BillyT0020]

I would definitely use the one with the screen, just make sure it’s oriented correctly. Last time I had my governor off I found a ton of tiny metal shavings from the cylinders/rings breaking in after a TOH. I was impressed with its filtering capabilities. 
 

Billy 

[EricJ]

Also, check Lycoming SB 1438A and make sure your engine/governor doesn't need the additional plate (and two gaskets) in order to prevent leaking if it isn't already there.

[Mooney-Shiner]

1 hour ago, EricJ said:

Also, check Lycoming SB 1438A and make sure your engine/governor doesn't need the additional plate (and two gaskets) in order to prevent leaking if it isn't already there.

Thank you. Luckily, I'm not dual mag. Just regular A1A with two split mags.  

[Mooney-Shiner]

For the sake of posterity, I've got a reply from Hartzell with the IPC for the H-1 governor. Looks like Hartzell 2024 IPC calls for B1104, AKA MS9144-01.