Physico chemical analysis of used hydraulic oil SS 311,and the hose pipe carrying the above oil of the new fatigue test rig

Physico Chemical Analysis Of Used Hydraulic Oil SS 31113; And The Hose Pipe Carrying the Above Oil Of The New13; Fatigue Test Rig. The hydraulic system of tine new fatigue test rig failed to function.The used hydraulic oil and the13; conveyor hose pipe were examined. It was found that the pipe and the gauze supporting it had contaminated the oil.The pipe had dissolved in the oil increasing its viscosity and specific gravity. The gauze contributed suspended particles(5 to 100 microns) which blocked the servo valve.Ultrasonic cleaning of the servo valve suspended in benzene removed all such particles of the sieve of the valve. The following recommendations are made to avoid13; this problem: (i) Use of teflon-lined hose pipe 13; (ii) Periodic check on the oil viscosity once in six13; months (iii) Introduction of an easily detachable13; magnetic line fi1ter. (iv) Ultrasonic cleaning of servo valve