My maintenance crew wants to take some forks off of a lift that had an engine blow up and use them on a similar sized capacity forklift. However, the mounting is different. Thus, they want to remove the existing clip type mount and weld tubing to the top to enable mounting on the other lift. My questions are:
1. What are the ramifications of welding and/or tempering the forks by welding on the top where it mounts to the vertical risers? 2. After welding, what should be done to temper the welds?
A quick search revealed this information:
1. Preheat to 600*F with a soft flame. 2. Postheat to 800-850*F with a soft flame. 3. Cool slowly. 4. NEVER weld on the face, or under any circumstance the INSIDE RADIUS of the HEEL. 5. Normally, never weld within half the diameter of the face. IE, 2" thick forks can only have a 1" weld on the sides. 6. Anything else causes soft spots and weakens the forks from their load rating. 7. Always match the lesser steel, usually mild steel, and use a low-hy electrode such as 7018 or 71T-1.
This a condensed, generalized weld procedure from many fork manufacturers.
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