brazing a hydraulic line

[etpm]

I would have liked to see better flow as I reheated several times to build up the patch.

You got the brazing rod barely hot enough. And every time you reheat it it needs to get hotter to flow. This is in part because the alloy you used is alloying with the existing brazing alloy, and this raises the melting temperature. Still, if the brazing alloy wetted the surfaces then you should be fine. Anyway, it looks like you will have a good patch. Let us know when you get it hooked back up. Make sure all sealing surfaces are clean and oxide free.
Eric

 

[coloradotrout]

Replaced the hydraulic pump from the original engine (this is a replacement). New hydraulic fitting orings, torqued line fittings to spec, and fired it up. No leak!

Now it looks like I may have an oil leak. I'm guessing rear crank seal but not sure.

 

[coloradotrout]

Have ran it for a few hours. No hydraulic line fitting leaks! First time in 20 years!

Now onto some leaks at the FEL connections (hopefully o-rings) the front axle (seal known for leaking), and maybe that oil leak.

 

[etpm]

Have ran it for a few hours. No hydraulic line fitting leaks! First time in 20 years!

Now onto some leaks at the FEL connections (hopefully o-rings) the front axle (seal known for leaking), and maybe that oil leak.

Good news! I was dubious about the MAPP gas torch being able to get hot enough AND being able to supply enough heat but it worked and that's great. Good luck, I hope your repair lasts forever.
Eric

 

[coloradotrout]

Good news! I was dubious about the MAPP gas torch being able to get hot enough AND being able to supply enough heat but it worked and that's great. Good luck, I hope your repair lasts forever.
Eric

It's old MAPP. Saved it from probably 25 years ago, when I was soldering a large sprinkler system manifold. But for grins, I have started a search for a used oxy/acetylene torch. Something else to learn ;-). How does one "heat" but not "cut" is my first question.

Appreciate all the help here. It's nice not seeing dripping hydro fluid and caked on gunk! Looks like I need some o-rings or new hoses on the FEL, and some seals on the front axles. My history is I get it all fixed up, and then something major gives out, and I have to buy new.

 

[mark in portugal]

I brazed many hydraulic fittings on my tractor; mostly I made the fittings to be brazed.
I use oxygen / propane.
The torch has a big cutting head which can be swapped for smaller tips for welding and brazing.

 

[coloradotrout]

It's old MAPP. Saved it from probably 25 years ago, when I was soldering a large sprinkler system manifold. But for grins, I have started a search for a used oxy/acetylene torch. Something else to learn ;-). How does one "heat" but not "cut" is my first question.

Appreciate all the help here. It's nice not seeing dripping hydro fluid and caked on gunk! Looks like I need some o-rings or new hoses on the FEL, and some seals on the front axles. My history is I get it all fixed up, and then something major gives out, and I have to buy new.

Looks like hoses are just seeping through the hose. Very slow, but another item to put on the list.

 

[coloradotrout]

I brazed many hydraulic fittings on my tractor; mostly I made the fittings to be brazed.
I use oxygen / propane.
The torch has a big cutting head which can be swapped for smaller tips for welding and brazing.

View attachment 4608696View attachment 4608695View attachment 4608694View attachment 4608693

Can you share the torch info/pics?

 

[mark in portugal]

I have a Swiss made 'Gloor' torch set; it's a pretty standard setup I think, I remember using a similar torch at my job in the US back in the 80's.
I pulled this picture from their website, it's the same set I bought new in 1990(ish) and another one second hand more recently.
Not many people still use gas for welding / cutting / brazing, so second hand sets go for small money.
These can be used with acetylene or propane, but propane cutting has different inserts for the cutter head.

 

[coloradotrout]

I have a Swiss made 'Gloor' torch set; it's a pretty standard setup I think, I remember using a similar torch at my job in the US back in the 80's.
I pulled this picture from their website, it's the same set I bought new in 1990(ish) and another one second hand more recently.
Not many people still use gas for welding / cutting / brazing, so second hand sets go for small money.
These can be used with acetylene or propane, but propane cutting has different inserts for the cutter head.

View attachment 4708471

Thanks. I've been looking at oxy/acetylene on facebook marketplace. I'm leaning towards a more portable setup albeit the tanks will be smaller.