User's Manual

MODEL 66-80 VIBRATORY DRIVER/EXTRACTOR
III. OPERATING INSTRUCTIONS
F.CHANGING FREQUENCY
1. In order to provide maximum flexibility in achieving optimum pile penetration
and extraction rates, the frequency of the vibratory driver is adjustable.
2. The frequency can be varied from 800 to 1600 vibrations per minute by
changing engine speed. Engine speed is changed with the ENGINE
THROTTLE on the control panel or with the remote electric throttle (FAST /
SLOW) switch on the pendant. Vibration frequency corresponds
approximately to engine speed according to the table shown below.
ENGINE RPM VIBRATOR VPM
20001600
18001400
16001300
14001100
1200900
1000800
G. SHUT DOWN
1. Stop the vibrator.
2. Allow the diesel engine to run for five minutes at 1100 RPM.
3. Reduce engine speed to idle for about thirty seconds.
4. Stop the engine by turning the ENGINE START switch to OFF.
5. Turn MAIN POWER switch to OFF.
6. Check engine crankcase oil level while power unit is setting level.
7. CAUTION: If the diesel engine is shut down while the vibrator is clamped to a
pile, the clamp check valve will keep the vibrator clamped to the
pile. However, system leakage could result in a loss of clamp
pressure over time. Therefore, it is not recommended to leave
the vibrator clamped to a pile when the diesel engine is not
running.
III-7