72450-ACT Series 1 Servo Controlled Variable Displacement Piston Motors

Servo piston mounted on top of the motor is connected to cam / swash plate and is used to change the cam angle. This in turn varies the motor displacement. Servo piston is actuated by means of external pilot pressure acting on either side of the piston.

There are two options available to actuate the piston, Min-Max position piston and spring biased servo piston.

In min-max displacement option, external pilot pressure moves the piston from minimum cam to maximum cam angle. No intermittent position is achievable. Displacement limiters are provided on both sides of the piston to set the maximum and minimum cam angle.

In spring biased servo piston design, external servo pressure works against servo spring force. As pressure inside servo cavity increases, servo piston moves towards maximum displacement and vise-versa.

2 Bolt SAE B Mount - 72450 Series

40.6 cm3/r [2.48 in3/r] Displacement

49.2 cm3/r [3.0 in3/r] Displacement