Equipment 336GC JFW00753 Hydraulics are overheating. Remedial Actions: 1) Cleaned the cooler pack that consists of -intercooler group; hydraulic cooler; coolant radiator. 2) Opened and valve group to check on stuck poppet on return passege to cooler and oil reserviour. found the poppet valve free. 3) Adjusted the fan speed by increasing the speed to specs. Today's ambient temperature has been 30 degrees Celsus. The hydraulics did overheat at midday. I never had a hydraulic overheat at higher ambient temperatures.
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