Air Intake; Contamination Indicator - Signal Ring Position Check - MTU 20V4000M73 series Operating Instructions Manual

7.12 Air Intake

7.12.1 Contamination indicator – Signal ring position check
Preconditions
☑ Engine is stopped and starting disabled.
WARNING
The engine draws in large volumes of ambient air for combustion. This air intake results in a strong vac-
uum.
Risk of injury if body parts are drawn in! There is also a danger if opening of the entrance door
can be prevented!
• Only operate the engine with installed air filters.
• Never open air-carrying components during operation.
• Ensure that the engine room is well-ventilated.
Checking signal ring position
1. If the signal ring is completely visible in the
viewing window (2), replace air filter
(→ Page 175).
2. After installation of new filter, press reset
button (1).
Result: Engaged plunger with signal ring returns to
initial position.
MS150046/03E 2018-08 | Air Intake | 177