Operator’s Manual
22
2.3.3
The centrifugal clutch (4) interrupts flow of power to the exciter (5) at low engine speed
and thus permits perfect idling of the drive engine (11).
2.3.4
The automatic V-belt pulley (13) combined with the centrifugal clutch
(4) Ensures optimum tension of the exciter V-belt (6) during operation and relief of the
tension of the exciter V-belt (6) when the machine is being relocated or transported.
2.3.5
Moreover, the automatic V-belt pulley (13) automatically adapts to the V-belt flanks in
line with the wear and thus makes the entire drive from the engine (11) to the exciter (5)
maintenance-free (see chapter Exciter V-belt).
2.3.6
The speed of the drive engine (11) can be infinitely varied by remote control on the
throttle control lever (3). The upper (7) and lower (8) masses are connected to each
other by 4 vibration-damping rubber metal shock mounts (9). This damping system
prevents the very high frequencies from being transmitted to the upper mass (7). As a
result the function ability of the drive engine (11) is retained in spite of the high
compaction performance. The drive engine (11) works on the diesel principle; it is
started electrically by a pinion starter (10), draws in the combustion air through an air
filter, dry and is air-colled.
2.3.7
To facilitate the starting procedure (at very low temperatures, with hand start) the drive
engine (11) has an automatic decompression mechanism. It ensures that compression is
very low during the cranking operation but steadily increases after a few revolutions
when it then switches over to full compression.
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