Oil Cooler Line

[dottieshusband]

I'm waiting on parts on the genny project and using the down time to replace a leaking transmission oil cooler line. I've got MG514c's going to 12v71ti's. I need to crack this fitting, but I'm unfamiliar with it. The nuts are 1.5 inches and the wrenches are 24 inches.. so I can do so damage easily. Anybody separate this fitting before? Insight is appreciated.

[JoshuaHall]

It looks like a standard flare fitting, with a swivel type female, connected to a flare to npt adapter. Put a back up on the hex of the adapter. The hose will come off to reveal the male side of that flare to pipe thread adapter.

[rustybucket]

Although I don't like using channel locks for hose fittings sometimes that is all you can get in there with. Also on some of them a crows foot will work.

Once you break it free it will almost come out the rest of the way with fingers. Sometimes you need something big for the initial break and something smaller to actually unthread it.

JoshuaHall is right, get something on the close nipple and then the flare female swivel.

[dottieshusband]

So, hold fast the painted nut on the right, and unscrew the stainless fitting to it's left?

[rsmith]

I'm waiting on parts on the genny project and using the down time to replace a leaking transmission oil cooler line. I've got MG514c's going to 12v71ti's. I need to crack this fitting, but I'm unfamiliar with it. The nuts are 1.5 inches and the wrenches are 24 inches.. so I can do so damage easily. Anybody separate this fitting before? Insight is appreciated.

You sure it’s 1-1/2? Doesn’t look that big. As already stated it’s a STD hydraulic fitting. Nobody doe it but you should hold the back nut and loosen the front swivel nut to keep from scoring the flare on the stationary fitting.

[rsmith]

So, hold fast the painted nut on the right, and unscrew the stainless fitting to it's left?

That not the pic of what you have

[oscarvan]

Let me try to assist.....

Hold A turn B. If C wants to turn, hold that too.

THIS WAS EDITED.... Although my initial answer (Hold C turn B) works, it was pointed out to me that the above is more correct....

[bigbill]

best i can tell, oscar is correct. the nut to the far left is to screw the fitting into the hose

[scottinsydney]

Hi Paul,

Are you going to replace all four (i think) hoses? Every time I view my engines and gears I look at these old hoses. The physically most difficult to replace would be the gearbox sump hose, which will require the oil to be drained.

[dottieshusband]

Thanks for the marked pic. It's definitely 1 1/2 inch. With a wrench this big, it's easy to torque something to death. I thought it was a mandrel type, like my fuel lines, but hadn't seen a swivel on any of the boat lines till now. The line is leaking at the cuff, not much, but time to go.