Bomag BW 156 D-3 Service Manual page 141

Fig. L3:
Checking the steering cylinders
• as a measure to check whether a steering cylinder is defective, i.e. if it has internal leakage, the
hydraulic hoses "L" and "R" can be disconnected from the steering cylinders and closed with plugs.
• Perform a steering pressure test (see Fig. L1): if the steering pressure is now reached, but is has not
been reached while the cylinders were still connected, one of the cylinders is defective. After this test
reconnect the hoses.
To find out which cylinder is defective you should proceed as follows:
• Start the engine and, if possible, steer fully to left or right and leave the machine in this position.
• If the steering has been actuated to the left unscrew the hoses from the rod side of the left hand and
from the piston side of the right hand cylinder.
• try again to steer to the same direction as before. If oil runs out from one of the cylinders this cylinder
is defective and needs to be replaced
• Repeat this procedure to the opposite side accordingly (cylinders may also leak only to ne side, e.g.
from piston to rod side)
BW 156/177 D-3/PD-3
BW 178/179 D-3/PD-3
Service Training
- FTr 4 -