A Contami-Kit is portable and simple. It filters a sample of working fluid, and gathers particles on a membrane filter. The distribution and number of…
General working fluid, as new oil, contains moisture in the amount of 50-80 ppm (0.005-0.008 percent). But, the ratio increases with moisturized air injected by…
There are three reasons for working fluid to be replaced. (1) Change in quality and deterioration of working fluid (2) Dust or external elements mingled…
Kinematic viscosity (absolute viscosity divided by density) [m2/s] is used to determine the value of viscosity of industrial lubricants, such as working fluid. Practically, mm…
Working fluid with the equivalent viscosity of turbine oil in petroleum lubricant is selected. There are two types of turbine oil: turbine oil without additives…
Hydraulic equipment is comprised of many kinds of hydraulic appliances, and does its job by transmitting energy through a non-compressible medium. In general, petroleum-based fluid…
Perform the following actions for maintenance and management of the hydraulic system. 1. Keep the working fluid clean (see Chapter 14 HYDRAULIC FLUIDS). 2. Make…
1. Knocking is caused by air in the working fluid. Remove the air from the fluid. 2. Knocking is caused by packing resistance. Apply molybdenum…
1. The pressure falls below the setting level. a. The valve is not properly seated. b. The orifice is clogged with dust. c. Stick-slip is…
1. Spool operation is failed because of dust. Clean the spool and replace the coil. 2. The voltage is too high or low. Set the…