hydraulic cylinder

[dragonslayr]

I've a simple (to you guys) question.
I've a fitting on a hydraulic cylinder I need to repair. I've been told I should tig weld fittings for hydraulic. Is there a reason for this?

More info:
Fitting is an elbow with a jic on one end with the other end welded to the cylinder.
Hydraulic on the tractor should be at max 2000 psi.

[mark8310]

Hydraulic cylinder fittings and ports can be welded MIG, fluxcore, or 7018. In fact, that's how they are welded from the factory. You just have to be careful, not to draw the metal in too much, it could warp the cylinder slightly, to the point the piston or cylinder end won't fit anymore.

[dragonslayr]

Good deal. I'll use the mig then.. Since the jic threads were buggared up on the elbow, I'm thinking to just mig a fitting that "kinda" screws over it to it. I feel safer than to be welding directly to the cylinder.

Last curious question is, why was tig recommended you think? I know nothing of tig, though am familiar with mig and stick.

[metalmeltr]

Tig was most likely recomended for its ease of
heat control

[chicksdigwagons]

TIG makes it easy to get a completely tight seal the first time around on small round fittings in my opinion.

[qaqc]

Tig would have the lowest heat input. Low heat input = less distortion.