HYDRAULIC VIBRATORY TESTS
THIS WORK PACKAGE COVERS
Vibratory Frequency Test, Inter-circuit Relief Valve Test
Tools and Special Tools
Engine off (TM 5-3895-379-10)
Parking brake engaged (TM 5-3895-379-10)
Drums chocked (TM 5-3895-379-10)
At operating temperature, hydraulic oil is hot. Escaping hydraulic fluid under pressure can penetrate the
skin, causing injury or death.
Hydraulic oil must be certified to have anti-rust, very high viscosity index and anti-oxidation additive
properties for heavy duty use.
Oil temperature must be at 140 +/- 5F (60 +/- 21C).
Vibratory frequency test must be conducted on uncompacted dirt or on tires.