Good to see this post, my manual is from 1985 and for warm up it only relates to below 0 degree C run engine at half speed for at least 10 minutes. For glow plugs the manual only goes to -5degrees C. The night before, the low was -28. By morning ie 9am ish it was up to -15 and im sure the block would still be a lot colder then -15. Needles to say with this old girl the warm ups for the fluids and starting needs to be longer. Warm up here is at least 30 minutes and the glow plugs are a good 75 count. Thanks again for the chart, I've added it to my manual.Just want to make certain you are aware of Kubota's trans/hydraulics warm up recommendations.
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You deviate from these recommendations at the risk of expensive damage.
Dave