TM 5-3895-379-23-2
FIELD MAINTENANCE
HYDRAULIC VIBRATORY TESTS
INITIAL SETUP:
Equipment Condition (cont.)
Tools and Special Tools
Parking brake engaged. (TM 5-3895-379-10)
Tool Kit, General Mechanic's: Automotive
Drums chocked. (TM 5-3895-379-10)
Personnel Required
Construction Equipment Repairer 91L (2)
Equipment Condition
Engine off. (TM 5-3895-379-10)
HIGH VIBRATORY FREQUENCY TEST
WARNING
At operating temperature, hydraulic oil is hot. Escaping hydraulicfluid under pressure can
penetrate the skin, causing injury or death.
CAUTION
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 140F +/- 5F (60C +/- 21C).
NOTE
Vibratory frequency test must be conducted on uncompacted dirt or on tires.
1.
Place propel control lever in NEUTRAL (TM 5-3895-379-10).
2.
Start and run engine at HIGH idle, 2,325 +/- 25 rpm until oil temperature is at least 100F (38C)
(TM 5-3895-379-10).
3.
Apply parking brake and place propel control lever in forward position (TM 5-3895-379-10).
4.
Place vibratory mode switch in dual drum position (TM 5-3895-379-10).
5.
Press button on top of propel control lever to start vibratory system (TM 5-3895-379-10).
6.
Record the reading from the Vibrations Per Minute (VPM) tachometer on steering console.
7.
Press button on top of propel control lever to stop vibratory system (TM 5-3895-379-10).
8.
Dual amplitude frequency must be 2,520 +/- 50 VPM in high.
END OF TASK
0250-1
03/15/2011Rel(1.8)root(maintwp)wpno(M00188)