repair of cast iron grill frame?

[dads70]

id pay that in a sec soon as i FIND ONE

Are there any other models that have a compatible grill?

Several on ebay but no 70.

Scott

[Merk]

70 and 100 use the same grill.

[Leon renaud]

Originally Posted by thenrie

Seems I recall something about pre-heating cast iron before welding. Can you shed some light on that, Leon?

With the MIG welding it really depends on the size of the repair. You can make a weld of a few inches without pre/post heating if you have a good weld it won't crack it depends on a lot of things.All my MIG welding on cast is with gas not Fluxcore I DO NOT know if Fluxcore will work never tried it .I wouldn't take that grill shell and just slap a weld on it ice cold this time of year for sure. I do usually preheat big items and also let them cool slowly out of air circulation.I usually use a big old gas grill I have for things that will fit in it I'll do all my prep work on the part then place it in the gas grill and heat it then I'll turn off the flame while I weld or braze the part once welded I relight the grill and let it run for about 1/2 hr then turn it off and let the part cool in the closed grill.when I weld up cast iron I will V groove the pieces almost completely through leaving only enough of the original crack/break to be able to realign the pieces correctly.I have patched connecting rod holes 4 inches around in an engine block that have passed magnaflux testing (Not my engine I'd have gotten another block)I've been a weldor since 1968 and WAS but no longer am aircraft certified.I have arc welded,Migged, Brazed , tigged and stitched different cast iron items with very good results I will admit right now I am mostly self taught on cast iron but have had the help of several "old timers"over the years.For any of you guys with some welding experience TRY the mig thing with mild rod I know your first reaction is "He's nuts "that's exactly what I thought when that old Engineer told me it works, but it does work and works well.There is no "Magic" in repairing cast iron do a little research and just try it get a junk part and "fix "it, It does take some practice but it's not nearly as hard as you might think.One advantage of welding cast rather than brazing is it's easier to blend the surface to hide the repair oils in brazing rod will lift paint eventually also.[I'm posting this just because you asked how I do it, But or the price I'd look for another grill first if you were local I'd fix it for you free just to help out a fellow Cub owner but if you can't weld it yourself I don't see it being done any cheaper than a replacement unit

[thenrie]

Good info. Thanks.