TM 5-3895-383-10
Operation Section
4-40
Operating Techniques
Illustration 55
4. If the machine is equipped with a variable vibration
control knob (3), adjust the frequency of the
vibration to the desired level by rotating the knob.
5. In order to stop the vibratory system, press the
vibratory on/off control (1).
NOTE: If the drum separates from the material that is
being compacted, you should select low
amplitude.
6. Return the propel control to the STOP position.
Low Amplitude
In order to decrease the total dynamic force of vibration
cycle, place the vibratory system in low amplitude. In
order to decrease the height of the drum movement,
place the vibratory system in low amplitude.
Low amplitude is used in the following situations:
If any decoupling occurs and you have not reached
soil density, use low amplitude.
The thickness of the material is less than 254 mm
(10.0 inch).
Objects such as sewer systems or water systems
may be damaged due to the higher forces of high
amplitude.
1. In order to place the vibratory system in low
amplitude, rock the vibratory control (3) forward.
2. Move the propel lever to the FWD position or the
REV position.
3. Start the vibratory system by pressing the vibratory
on/off control (1). The control is located on the top
of the propel lever.
4. If the machine is equipped with a variable vibration
control knob (3), adjust the frequency of the
vibration to the desired level by rotating the knob.
5. In order to stop the vibratory system, press the
vibratory on/off control (1).
6. Return the propel control the STOP position.
