Prop control oil line

[longline]

You are running the PCU 5000 governor?
woody

[pazmanyflyer]

Originally Posted by longline

I have a wide deck engine that will be built as a parallel valve. Trying to figure out which Lycoming part number for the prop governor to forward case tube. I do not want to use a hose. I have been told that there are different tubes, so I am looking for the part number from someone that has installed the PCU5000 governor.

Thanks
Longline

Service instruction No. 1435 covers the part numbers for the various Lycoming models. See page 4 for part numbers. Here's the link to Lycomings SI 1435 for download. https://www.lycoming.com/content/ser...uction-no-1435

[Larco]

Originally Posted by longline

You are running the PCU 5000 governor?
woody

IIRC The governor isn't the issue. It is the governor adapter which will accept the install of a variety of governors.
Superior sends out a hose for the task but I elected to order the SS line 75167 and it fit around the motor mount and to the adapter.

[TS Flightlines]

Good probability that 75167 would fit most applications. Look at page 3 of SI 1435. The show the tube, a straight, and what looks like to me a 45*, maybe a 90* adjustable adapter fitting. In their pic, the angled fitting is used to fit that tube, assuming its a 75167. Put in the straight nipple, and that tube wont work. Re-orient the installed angle of the adjustable fitting and the tube wont work.
Its great for a Lycoming installed governor for whatever prop. My point was for those custom experimental engines out there that at some point my have changed the governor and housing, the 4 Lycoming part numbers may not orient correctly.

Seems that they are all very similar to a point near the right lower Dynofocal mounting boss, then they change to route to the governor. You can still use a stainless rigid tube, but you may have to custom may one to fit YOUR particular application. I ones I made were for IO360, Superior sumps, and apparently 2 different governors or housings, and required 2 different angled tube ends to meet the adapters. Wasnt a problem to make, just wasnt an off the shelf item.

Tom

[rvsxer]

Use the 75167 line. As has been mentioned a couple of times, the make of governor has NO bearing on which oil transfer line fits. It runs from the nose of the engine case to the adapter the governor is attached to, not the governor itself. You can change the fitting on the adapter to fit the line if you have to.
I converted my O-360 A1A narrow-deck for a constant speed last year and, for all you narrow-deck guys, the 75167 line fit fine (even though it's called out for the wide-deck engines) with minor tweaking.
This line can be a little expensive and can be had used, just make sure it is a steel line. The early ones were aluminum.

[TS Flightlines]

HI Mike!
WE might end up making some 75167 in stainless. Guess we need to check the housing adapters to see what threads they are---the one the other day was 1/4 NPT, the test engine was O'Ring boss. Maybe even supply the different fittings.

Tom

[rvsxer]

Originally Posted by TS Flightlines

HI Mike!
WE might end up making some 75167 in stainless. Guess we need to check the housing adapters to see what threads they are---the one the other day was 1/4 NPT, the test engine was O'Ring boss. Maybe even supply the different fittings.

Tom

Hi Tom. Mine was an early (1959!) adapter and it had NPT threads. All the late ones are straight threads like the fuel pump fittings. They both terminate in AN flared and I think you can change either for straight or 45 degree to match the transfer tube.

[longline]

is the key. I got that, thanks. Went to the hangar and looked at it, too. The parts catalog also calls out two different lengths of studs to mount the governor... and I will need to change those studs. Oh well.
I will try the suggested tube.
Thanks to all that replied
Longline

[longline]

every oil line I have worked on was O ring boss. I find it interesting that early engines used pipe thread.

[cajunwings]

If acquiring a used part make sure the “B” nuts are steel. Many of these lines were removed to comply with a old AD note (90-04-06) because of the aluminum “B” nuts. Also the fittings on the on the governor drive and the nose of the crankcase need to be steel due to the working pressures involved.

Don Broussard
RV9 Rebuild in Progress
57 Pacer