Hi Steven,
To use a Standard Ambient Forklift in the freezer, you have to Modify the Forklift, Make it Freezer Condition, We did it on a Crown Forklift, using Freezer Condition Kit, I'm not sure if Yale Have has Freezer conditioning Kit.
Hope the Yale Tech can give us a advice on this?
kind regards,
I converted a normal ambient ice machine for a -30°C freezer by carefully checking all components for low-temperature tolerance.
I haven't done it personally, but you'll need insulation upgrades, a low-temp-rated compressor, and possibly defrost modifications to handle -30°C safely.