The major components of the vibratory electrical circuit are:
fuse (1), propel speed switch (2), amplitude control switch (3),
low amplitude rheostat (4), electronic displacement control
valve (EDC)(5), control switch (6), frequency control rheostat
(7), high amplitude rheostat (8).
The electrical circuit controls the drum vibratory hydraulic
system by varying the amperage flow to the EDC. The
variable circuit turns the vibratory system on and off, controls
the vibratory amplitude and controls the vibrations per minute
(VPM) of the eccentric weights.
Control switch (6), located on the propel lever, turns the
vibratory system on and off. Switch (3), located on the
Frequency control rheostat (7) is located on the operator
control console and controls the VPM of the weights.
A vibratory lockout circuit can be installed as an option. The
optional vibratory lockout circuit prevents the operator from
running the vibratory system when the machine is in high