MTU 20V4000C55, Руководство по эксплуатации

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8.11.3 Exhaust flaps – Checking coupling rod clearance and function
Preconditions
☑
Engine is stopped and starting disabled.
☑
No operating voltage 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 rods (bypass and EGR flap) – mechanical
Note: For installation position of exhaust flaps, refer to overview (→ Page 112).
1. Remove guard plates of exhaust flaps (→ Page 115).
2. Check operability and ease of movement of
coupling rod (1) by moving it at the specified
points (arrows) and make sure that there is
no excessive play.
Result: Replace coupling rod (1) if it is jamming, slug-
gish or features excessive play (→ Page 115).
3. Check whether the internal spring pulls the
flap into the F-position:
• Fail-safe position for bypass flap and EGR
shutoff flap: opened.
• Fail-safe position for donor cylinder flap:
closed.
Result: If the bypass flap/EGR shutoff flap is closed
or the donor cylinder flap is opened, contact
Service.
Checking coupling rod (donor cylinder flap) – mechanical
Note: For installation position of exhaust flaps, refer to overview (→ Page 112).
1. Remove guard plates of exhaust flaps.
MS15043/00E 2016-04 | Exhaust Gas Recirculation | 113
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