The spindle coded K 87088 is a key internal part of the pressure regulating valve in the Adriadiesel ZV40/48 engine. This spindle transmits motion from the actuator to adjust the flow and pressure within the valve body, directly influencing fuel or lubrication regulation. Crafted to tight tolerances, the spindle ensures accurate control under fluctuating operational demands. Its performance directly affects the valve’s responsiveness, making it crucial for maintaining engine stability, fuel efficiency, and protection against overpressure scenarios.