Y67/Y131
1
B98
180°
90°
IN
OUT
P1
T
P2
IN
S-834-0004
1
2
3
4
Y22
M
Fig. 99
1
Hydraulic oil tank
2
Steering / charge / vibration pump
3
Vibration motor
4
Vibration valve (Y22) with pressure test port
M Pressure test port
The vibration pump delivers the hydraulic oil from the tank to the
vibration valve (Y22). When the vibration is switched on, hydraulic
oil flows to the vibration motor.
Rotation of the vibration motor causes rotation of the exciter shaft.
The eccentric weights attached to the exciter shaft generate the
vibration of the drum.
Vibration drive
Hydraulic system – Description of hydraulic circuits
BW 900-50
117
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