8.7.4 Bypass flap – Coupling rod function and play check
Preconditions
☑
Engine is stopped and starting disabled.
☑
No operating voltage is applied.
WARNING
Actuation mechanism in the exhaust and intake area closes automatically.
Risk of crushing hands!
• To carry out the teach-in routine, keep clear of the safety zone of the actuation mechanism in the
intake and exhaust area.
• Switch off the operating voltage of the engine governor before starting the mechanical test.
• Wear protective goggles.
WARNING
Hot components/surfaces.
Risk of burns!
• Allow the engine to cool down to below 50 °C before beginning work.
• Wear suitable protective equipment/thermal gloves.
• Avoid unprotected contact with hot surfaces.
Checking coupling rod, mechan-
ical
Note:
For installation position of exhaust flaps, re-
fer to overview drawing (→ Page 119).
1.
Move coupling rod (1) at the marked
points (arrow) to check operability, ease of
movement and make sure that there is no ex-
cessive play.
Result:
Replace coupling rod (1) if it is jamming, slug-
gish or features excessive play (→ Page 121).
2.
Remove actuator with holder from turbine
housing (→ Page 126).
3.
Visually check actuator and holder for dam-
age.
124 | Exhaust Gas Recirculation | MS150100/06E 2017-08
TIM-ID: 0000078362 - 001
