Cleaning The Cooling System - Mercedes-Benz OM 904 LA Operating Instructions Manual

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High-pressure cleaners
Observe the manufacturer's operating in-
structions.
!
Maintain the minimum distance be-
tween the high-pressure cleaner nozzle
and the object to be cleaned:
approximately 70 cm for round-
spray jets
approximately 30 cm for 25° flat-
spray jets and concentrated power
jets
Keep the water jet moving constantly
while cleaning. To avoid damage, do
not aim the water jet directly at:
electrical components
connectors
seals or
hoses

Cleaning the cooling system

Environmental note
Collect used coolant, cleaning solutions and
detergents and dispose of them in an envi-
ronmentally responsible manner in accord-
ance with current local regulations.
Blow out any foreign objects (dust, in-
sects, etc.) from the radiator fins using
compressed air or remove them by
spraying water from the rear side of the
radiator (against the direction of the
cooling air flow).
!
Only apply moderate pressure when
cleaning since the radiator fins could
otherwise be damaged.
Cleaning/protective treatment
Risk of injury
H
The cooling system is pressurised. Hot cool-
ant can escape under pressure when the
cooling system is opened and scald your
skin and eyes.
Only open the cooling system at coolant
temperatures below 90 °C.
Unscrew the cap slowly and release any
excess pressure completely before
opening the cap fully.
Wear suitable protective gloves, protec-
tive clothing and safety goggles when
handling coolant.
Operation
G
4
55

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