Annually or every 20,000 km.
To ensure normal operation of the throttle actuator rod, it should be periodically inspected and lubricated.
1. Check the actuator linkage to make sure it is not twisted.
2. Check up, whether hinges of draft, and also its connections on presence of signs of corrosion or damages have loosened. Replace damaged parts if necessary.
3. Check and lubricate the throttle linkage at the points shown in the picture - shown for an engine equipped with a fuel injection system
4. Lubricate the rod connections with spray or lithium based grease.