MF 65 with g176 gas engine with cessna power steering pump what are the fittings?

[mllud]

On this hose ends I said the other end was n.t.p. because j.i.c. high pressure hydraulic fittings are usually steel not bronze. If this photo is the other end of that same hose I'm second guessing what the hose ends are. You did say you think its the return side; low pressure
That fitting on the cylinder would just take a minute to take loose and see what fitting you have. Hold the nut closest to the cylinder and loosen the other. You probably know that. You should have a bucket ready but shouldn't get a lot of fluid. Both ends of the hose should be the same unless the hose was made special.

That bunch of fittings on that other end can be reduced to one or two.
Is that stainless fitting that goes into the pump brazed in? I see a drip of something.
If so they may have broke it off and repaired it.
If its not brazed in you could start fresh on that end right up to the pump casting.

I would post a link to the [Surplus Center website] but I think posting links here is against forum rules. The prices of their fittings and premade hoses and the selection is good. Google them and go to the hydraulic section. I don't have any connection to the company. Try to order what you need in one order. Shipping costs.

 

[fatb]

yes just looked at it, that drip of something is teflon tape! The cylinder side is not leaking so maybe i will keep hose and put nipple and and 90 degree and I guess i should use teflon tape also.

 

[mllud]

yes just looked at it, that drip of something is teflon tape! The cylinder side is not leaking so maybe i will keep hose and put nipple and and 90 degree and I guess i should use teflon tape also.

Teflon tape is good on anything N.P.T but with hydraulics have the fitting dry of any oil and keep the tape about an 1/8" from the end. Any Teflon tape getting in the hydraulic system can get in a valve.
Any flared fittings or j.i.c fittings shouldn't need Teflon tape to seal. You may know all this. That Teflon paste in the container with the brush to apply it works just as well and is easy to apply.
Years ago n.p.t. sealed well without Teflon. Now the manufacturers run the cutting dies past worn out and the threads have small chips.
Getting rid of all those copper and brass fittings on the pump will be good That's an opportunity for a failure. A weak spot. The return is low pressure but just the weight of the hose and vibration it needs to be fixed. I'm sure you have been watching that patch job shaking your head.
Your tractor doesn't look like its bathed in oil. Mine was black top to bottom.

 

[fatb]

yes the hoses on the cylinder dont leak but the cylinder leaks I believe need to investgate that also sometime I just keep it topped up

 

[rScotty]

I agree with mllud that you have the opportunity to get rid of some fittings there. I used to use brass and bronze fittings by preference, but now brass is poor quality and bronze is getting hard to find unless you have a handy hi-quality commercial marine store nearby. Regular old carbon steel fittings are often tapped with dull tabs and have terrible threads....which is the one thing that tapered fittings shouldn't have. They need nice threads to work right.

Keep in mind that for modern hydraulics you need a higher PSI rating than plumbing fittings give you. Nobody wants even the remote chance of being sprayed by a deadly hydraulic pressure leak, so go with hydraulic rather than plumbing fittings even if they do screw together.

I had a gas pressure line with a tiny leak that I could smell but couldn't find. It was leaking too slow to show on a bubble test. One day I just accidently found that one of the compression nuts had a tiny split from when it was installed. Cheap brass.... I should have known better.

BTW, both brass and bronze are alloys. Brass is copper and zinc; bronze is copper and tin and is resistant to sea water. At least that is what they are supposed to be technically. In more common usage today I'm seeing that the words "Brass" used for cheap plumbing fittings and "Bronze" is for any of several more complicated alloy such as copper+Tin & Zinc+nickle+silver+ this and that.

Mllud says stainless is preferable and there again I agree. If you want the best use stainless. If you look at aerospace, medical, instrument, or lab equipment that uses any of the tapered thread or compression fittings I think you'll see that they tend to be stainless steel. It's tougher, threads and deforms nicely, and costs lots more! Has a tighter thread tolerance (instrumentation tolerance). And if you don't have the right fittings, you'll find that it brazes beautifully.

My absolute favorite fittings are made from SS alloy 316 fittings that I order online from McMaster-Carr.
rScotty

 

[fatb]

Hello thanks for all the informative posts just wanted to give a heads up HoseandFittings.com has free shipping if you input google into promotion code.

 

[fatb]

Hi was the 24 tpi an inverted flare with a diameter of 7/16 or 3/8. Just getting around to fixing this line

 

[fatb]

Finally getting around to fixing this line here a pic of port on power steering cylinder assume this would be a 1/4 inverted flare with 7/16 24 tpi thread?

tia

 

[fatb]

Ok folks just for future reference I ordered 1/4 hose with 1/4 inch 90 swivel male inverted flare 7/16 24 tpi on one side on the other I put 3/8 female jic with 9/16 18 tpi threads. Got some adapters and elbow going from 1/4 npt at pump to 3/8 jic.