1 I had two John Deere mower decks come in to me from family and friends this spring with multiple cracks. Instead of buying new decks, we were able to fix them and put them right back into service. Read more to see how we did it. John Deere DIY Mower Deck RepairJuly 27, 2015 in FABRICATION KNOWLEDGE / FABRICATION PROJECTS tagged Crack / Deck / Fabrication / Lawn Mower Deck Cracked / Metal Fabrication / Mig Welding / Mower / Mower Deck Repair / Welding by Paul