Adjustable Flow Control Valve: D63575
The valve is located on the left-hand side port of the
rotary actuator. It’s purpose is to restrict oil coming out
of the actuator when the lifter is moving back down. By
restricting the oil, the lifter is prevented from “getting
ahead” of the oil and slamming into the ground.
This valve only works in one direction, so adjusting it does
not affect the speed of the upwards direction.
The valve has a small arrow stamped into its body. The
arrow should point away from the actuator.
If the lifter comes down too quickly, try turning this valve
in clockwise ¼ turn at a time until the down direction is
smooth and under control.
Suggested Perkins Single Lifter Hydraulics Schematic
The circuit is only a suggestion and for reference only, the lifter comes with the cylinder and Adj. Flow Control Only.
Other components are part of the (sold separately) hydraulic kit or part of the trucks’ hydraulic system.
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