Bomag BW 156 D-3 Service Manual page 92

Service Training
Fig. F3:
Checking the mechanical neutral position
The mechanical neutral position determines the mechanical position of the pump control piston. This
piston is connected with the swash plate and its position determines the position of the swash plate. If
the piston is out of neutral position the swash plate actuates the working pistons, whereby oil is being
pumped to the travel motors.
• Connect both control chambers on the pump control with a suitable hose
• Start the engine
• If the mechanical neutral position is correctly adjusted the machine will not move.
BW 156/177 D-3/PD-3
BW 178/179 D-3/PD-3 - DTr 4 -