i have to weld a cracked C-frame on a D6M lgp, looks to be 1/2” thick on the sides and 3/4” on top , trying to figure out what Tensile wire to use . Would be nice to know what kind of steel cat uses on the frame. Also, what is your own technique for repairing a C-frame Thanks Jeff
i did this little project with lincoln 71m dual shield 1/16 wire i use that stuff on everything lol
Post a picture of location of your crack , that mayhelp with suggestions if anyone has good ideas . If 7018 rod is suggested for your repair then er70s-6 should be dandy as that is in most shop wire feeds already
The prep and procedure is as or more important that filler material. If it's not beveled right and cracks aren't stopped it won't matter what you weld it with it'll crack again.
Here’s some pics
We would V notch out all the cracks & fill them back with 7018 electric glue . Then drop a half inch thick plate on top to finish it out . It's all in the prep work .
I would be asking cat for a procedure, just to cover my arse.
I have repaired several of those. The approach that TD25 is where you want to start. Plate it with 572 Gr 50 plate.
, now I have the cracks ground out on a 45 . Do I need to pre heat before welding,
After the repair put the operator on notice ..... This is a 6 way blade built for grading dirt ... Not prying out tree stumps & banging around in the rock
A little preheat won't hurt a thing. 200 or 250 degrees.
yes, preheat it to 500 degrees and then heat again after welding to release stress
That’s what I was thinking, probably overkill but going to use 3/4 plate on top and bottom from the tree back 40”
1/2" or 5/8" would be quite sufficient. One should never use heavier material for a fish plate that what was originally there.