Do I need deferent cases???

[David Nielsen]

Today I tried to order crankshaft bearing from Aircraft Specalties. I talked to Chad, who asked what kind of thrust washers I needed. That was new one on me. Chad e-mailed me a chart to identify my cases. There is one case that will not accept thrust washers. It uses a one piece front main bearing. That appears to be the cases I have. They do not make a front main bearing .020 under for this case. Meaning my freshly ground crankshaft will not go into the cases I have. What a bummer. Is there anything I can do other then find some proper cases? i'M TO THE PLACE WERE i'M GETTING REALY DOWN IN THE DUMPS ABOUT THIS PROJECT. Can anyone advise me?

Dave

[Champ Dreamer]

Dave,

I beleive the 0200 cases require the one piece front main bearing. Look at your cases, if there is a small (about 3/16") dowel afixed to the groove where a thrust bearing would go, i believe you would have a standard type case. What engine do you have?

Brian Walker
NOT A LICENSED A&P MECHANIC* OR AN EXPERT !!

*workin' on that

[Paul Agaliotis]

Dave,
The current engine in my L16 also uses a 1 piece front main. I would say you're going to change the case or find a +.010 crank. You might check and see if they can modify your case. I've never seen it done but stranger things can happen. I'm assuming this is a C85 engine.
Paul

[jepropst]

Dave, you did not mention which engine you have. When I restored my plane, the C 85-12 engine had a one piece front main bearing. Like everything else in the engine it was broke. Bill Pancake rebuilt my engine with a new O-200 crank in the C85 case, which had been sent off for inspection. I tried to order the bearings prior to rebuilding the engine but Bill insisted that I wait until he had a chance to see the case. When we did replace the front main bearing, Bill used two separate thrust washers and a two piece journal bearing. Paul already mentioned the issue of the dowel. I don't recall the details because I was just watching Bill work, but as I recall there are different thrust washers depending upon the case and the dowel. I would suggest that you take some photos of the bearing journal area of the case and then give Bill Pancake a phone call and email the pictures to him and he can most likely lead you in the right direction.

[David Nielsen]

You guys are great. I'll call Divco. Then see if I can get ahold of Bill Pancake. Sorry I'm getting old and forgetful, it's an A-65

Dave

[Al Hatz]

You can modify your case to fit the .020 bearing/thrust washer combo. You can have DIVCO or AJAX or most engine shops that deal with case work do it, I think the shipping cost more then the actual machining costs. If you're a decent machinist or know one you can also do it yourself, all you're doing is making a notch in the case to accept the thrust washer.

[Paul Agaliotis]

Dave,
Keep us posted on this. In the past I've had C85 cases modified for the O200 thrust washers but haven't tried it on an A65. As far as I know all of the A65's had a 1 piece front main. I never have tried to modify a 1 piece front main to a 3 piece.
Paul

[David Nielsen]

Paul,
I talked to DivCo this AM. They gave me the following info: Yes the cases can be machined to accept the multi piece front main bearing. They quoted a price of $100 dollars and a one day turn around, The proper bearing is an A-4 setup. This is what they said to me and of course is for the A-65. I have a freind who owned a machine shop and still plays with doing small jobs,,. I have an e-mail sent to him to talk about this Mod.

Thanks for your input guys

Dave

[DC Krog]

I know your friend may be the best machinist on earth but if this engine is going into an aircraft with a standard airworthiness certificate I would have a yellow tag on that case when it gets back.....

Just a small suggestion.

DC Krog

(If not you are the proud owner of an airboat engine)

[Paul Agaliotis]

Dave,
I did some looking this morning and it looks like the O200 thrust won't work. The castings are a little different and it looks too narrow to fit the washer. The C85 looks like it will fit. I don't know what the A-4 set up is but there are a few different thrust washer set ups for the C85. Good luck on this mod, once you get it all worked out it should give you great service.
Paul