... and maintenance costs;2 The built-in oil contamination detector,which can detect the oil contamination immediately, reduces the helicopter hydraulic system ... , increase the reliability.6 Joint easy to change, the oil pressure adjustable, development ability, which can adapt to a ... Working fluid:MIL-PRF-83282 or YH-15 hydraulic red oil; 6) System temperature:hydraulic system continuous working 2h,system ...