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Originally Posted by john_bud
Warm the tractor up longer with the clutch dogged down. 5 minutes for every 5 degrees below 15 or 20F. That will disconnect the HST pre-charge pump so it won't push any fluid until it warms up.
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JB, good advice. However, the DX40 has no clutch and the charge pump runs anytime the engine is running. There is no way to warm up the engine and not also run the charge pump. However, if the engine warms at low rpm, that will probably be the best for keeping the pressures low. It will just take a long time to warm up 10 gallons of cold hydraulic oil in the reservoir.