C-85 oil screen wrench size

[DannyDot]

What wrench size do I need to buy to remove the oil screen on a C-85-8. My 1 1/16 is too small and my 1 1/4 is too big.

Danny

[flyguy]

Re: C-85 oil screen wrench size

Good quality adjustable wrench.
DC
.

[DannyDot]

Re: C-85 oil screen wrench size

I found my 1 1/8 inch wrench and took off the part. It was the pressure relief valve. Where is the oil screen on the engine? Do I have to pull the lower cowl to get to it?

Danny

[DannyDot]

Re: C-85 oil screen wrench size

I found my 1 1/8 inch wrench and took off the part. It was the pressure relief valve. Where is the oil screen on the engine? Do I have to pull the lower cowl to get to it?

Danny

[crispy critter]

Re: C-85 oil screen wrench size

All I have ever seen take a 1"(one inch) wrench.

[VictorBravo]

Re: C-85 oil screen wrench size

Where is the oil screen on the engine? Do I have to pull the lower cowl to get to it?

You don't absolutely have to pull the cowl but it will take a lot less time and sweat if you do. (Pull up a milk crate or a rolling chair on the right side of the firewall, point a fan towards you to stay cool, and sit comfortably. Your airplane will be a lot safer and run better if you make yourself comfortable and un-stressed when you are working on it.)

The oil screen is on the back of the engine under the right magneto, where the oil temperature bulb is installed. You have to take out the oil temp bulb and the adaptor, which has a big square brass nut on the back, not a hex nut. When you take all that stuff out, you can pull the screen easily. Scrape out any goo or dirt and any metallic particles, put this goo into a Ziploc bag to show your mechanic, and THEN you can clean the screen with solvent.

When you put the screen back in, you have to install a new AN900 copper-asbestos "crush washer", you should not use the old one. If you are clever, you can safety wire the oil screen cover to the oil pressure relief valve, making sure the wire is trying to pull BOTH of these items clockwise (tightening direction).

Bill

[Forrest Barber]

Re: C-85 oil screen wrench size

I leave the adapter in place. Special tool attached to this message to remove screen very easily. Remove oil temp probe , place over screen
1 in nut and smack with a drift punch .

[VictorBravo]

Re: C-85 oil screen wrench size

Ahhhh Soooo !!!

[DannyDot]

Re: C-85 oil screen wrench size

You don't absolutely have to pull the cowl but it will take a lot less time and sweat if you do. (Pull up a milk crate or a rolling chair on the right side of the firewall, point a fan towards you to stay cool, and sit comfortably. Your airplane will be a lot safer and run better if you make yourself comfortable and un-stressed when you are working on it.)

The oil screen is on the back of the engine under the right magneto, where the oil temperature bulb is installed. You have to take out the oil temp bulb and the adaptor, which has a big square brass nut on the back, not a hex nut. When you take all that stuff out, you can pull the screen easily. Scrape out any goo or dirt and any metallic particles, put this goo into a Ziploc bag to show your mechanic, and THEN you can clean the screen with solvent.

When you put the screen back in, you have to install a new AN900 copper-asbestos "crush washer", you should not use the old one. If you are clever, you can safety wire the oil screen cover to the oil pressure relief valve, making sure the wire is trying to pull BOTH of these items clockwise (tightening direction).

Bill

The Wag Aero people tell me there is an AN900-?? (where the ?? is a number). Anyone know the proper part number for the screen cover gasket on a C-85-8 engine?

Danny

[N96337]

Re: C-85 oil screen wrench size

I hate to be the one to throw water on this...but it really bothers me that you're pulling stuff off the back of your engine, looking for the oil screen, without having any clue what you're pulling. Don't get me wrong....I'm all for you learning how to do all this...but you should have someone that's knowledgeable (preferably an appropriately rated mechanic) showing you what is where, the first time through. If they wanted to make a big deal of it, you've violated FAR's by pulling the oil pressure relief, as it's not listed in FAR43, Appendix A (c). Perhaps you should consider getting a mechanic to walk you through these things the first time...
Just my 2 cents worth....
John

[T.Taylor]

Re: C-85 oil screen wrench size

I hate to be the one to throw water on this...but it really bothers me that you're pulling stuff off the back of your engine, looking for the oil screen, without having any clue what you're pulling. Don't get me wrong....I'm all for you learning how to do all this...but you should have someone that's knowledgeable (preferably an appropriately rated mechanic) showing you what is where, the first time through. If they wanted to make a big deal of it, you've violated FAR's by pulling the oil pressure relief, as it's not listed in FAR43, Appendix A (c). Perhaps you should consider getting a mechanic to walk you through these things the first time...
Just my 2 cents worth....
John

John, that's what I've been wondering about, and he should be sure and write EVERYTHING he has done to his airplane in the maintenance records. people wonder why i am loosing interest in doing annuals, T.T.

[Hank Jarrett]

Re: C-85 oil screen wrench size

AW Come on you guys. You don't need an A&P or IA to take anything off your plane!

You need him to put it back together again (and fix what you ruined).

If you're SMART, you will get him to help you take it apart so you do it right the first time and don't tear your plane up! A good mechanic is worth EVERY DIME you pay him. Keep him in business!
Hank

[Forrest Barber]

Re: C-85 oil screen wrench size

The tach shaft seal is a good one to discuss.... had to fix a few owners foul ups on that one. Just pulled the prop on a 90 HP Lambert tonight , the correct way. Please have a mechanic show you first and understand you can do the "work" but you need the proper certification to return the ship to service.

[flyguy]

Re: C-85 oil screen wrench size

Gotta agree with John on that, but I wasn't going to be the first one to say it. The last time I did (in admittedly stronger language) I really got jumped on.
Anyways it does work both ways. I can make one heck of a list of awful stuff that was done to my present plane by the previous owner AI and his AI son. Fortunately none of them were fatal on my 400 mile trip bringing it home.

My first Taylorcraft, which was signed off, was much worse.
Rudder and elevator cables crossed over each other.
Nut completely missing on elevator control and bolt about to fall out.
Hidden leading edge ribs replaced with plywood. Ect, on and on.

Works both ways.
DC

[T.Taylor]

Re: C-85 oil screen wrench size

AW Come on you guys. You don't need an A&P or IA to take anything off your plane!

You need him to put it back together again (and fix what you ruined).

If you're SMART, you will get him to help you take it apart so you do it right the first time and don't tear your plane up! A good mechanic is worth EVERY DIME you pay him. Keep him in business!
Hank

What was that my dad used to say??? "Anybody can rinder an aircraft unairworthy, but the number of folks who can make it airworthy are fewer . T.T.