Adjustment of the starting clearance of the 1st stage air damper
This adjustment must be made when the coolant temperature is less than 20°C. At higher temperatures, cool the thermostatic actuator 4.
Make sure the air dampers move freely.
Move the rod 1 to the left, resting it on the intermediate lever 2.
Move the lever 3 to the stop in the rod 1 of the pneumatic actuator.
Check the starting clearance of the 1st air damper stage using a 1.2 mm drill.
Loosen nut 5 if necessary and adjust servo travel 4 to the correct size.
Adjustment of the starting clearance of the second stage of the air damper
Remove the body of the bimetallic spring, turn on the ignition and after about 150 s, move the rod 1 of the pneumatic drive to the left until it stops.
Move the lever 3 to the stop in the rod 1 of the pneumatic actuator.
Check the starting clearance of the 2nd stage air damper using a 4.2 mm drill.
If necessary, adjust the size by turning the adjusting screw 6.