Service Training
BW 156/177 D-3/PD-3
- D 6 -
BW 178/179 D-3/PD-3
The pump flow is proportional to the drive speed (engine speed) and the infinitely adjustable
displacement. By altering the position of the swash plate the pump flow can be adjusted from “0" to
maximum pump displacement. When changing the swash plate position through neutral both the oil
flow direction and the travel direction of the machine will change.
All valves as well as the safety and control elements required for pump operation in a closed circuit are
integrated in the pump. However, this does not apply for the charge pump. This pump is an integral
part of the vibration pump.
Fig. 4 Travel pump
1
Control lever
2
Drive shaft
3
Bearing for swashing cradle
4
Pistons with slipper pads
5
Cylinder block
6
Valve plate
7
Control piston
1
2
3
4
5
6
7
Summary of Contents for BW 156 D-3
Page 143: ...Service Training BW 156 177 D 3 PD 3 G 2 BW 178 179 D 3 PD 3 Supply Fig 1 Power supply...
Page 152: ...Service Training BW 156 177 D 3 PD 3 G 11 BW 178 179 D 3 PD 3 Brakes Fig 5 Brake...
Page 159: ...Service Training BW 156 177 D 3 PD 3 G 18 BW 178 179 D 3 PD 3 Vibration Fig 7 Vibration...
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