I fought rising hydraulic temps (peaking 215°F) on a 2018 Deere 2154G with a Waratah HTH616 last week. Verifying fan command (78% PWM at 210°F), backflushing the stacked coolers, and then flow-testing the saw motor case drain with an inline meter showed 2.1 gpm (spec under 1.0); swapping the motor dropped temps about 25°F. If you’ve got a quicker field check for cooler delta‑T than pulling screens every hour, what’s working for you?