Yanmar 4TNV98, Service Manual

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4TNV98 & 4TNE98 Diesel Engine Section 5. Cooling System 202
WARNING
BURN HAZARD!
If you must drain the engine oil while it is still
hot, stay clear of the hot engine oil to avoid
being burned.
ALWAYS wear eye protection.
Failure to comply could result in death or
serious injury.
CAUTION
FLYING OBJECT HAZARD!
ALWAYS wear eye protection when servicing
the engine and when using compressed air or
high-pressure water. Dust, flying debris,
compressed air, pressurized water or steam
may injure your eyes.
Failure to comply may result in minor or
moderate injury.
CAUTION
PINCH HAZARD!
Carefully rotate the alternator toward the
cylinder block while loosening the V-belt.
Failure to comply may result in minor or
moderate injury.
CAUTION
Only use the engine coolant specified. Other
engine coolants may affect warranty coverage,
cause an internal buildup of rust and scale
and/or shorten engine life.
Prevent dirt and debris from contaminating the
engine coolant. Carefully clean the radiator cap
and the surrounding area before you remove
the cap.
NEVER mix different types of engine coolants.
This may adversely affect the properties of the
engine coolant.
CAUTION
If the engine coolant pump must be replaced,
replace the engine coolant pump as an
assembly only. Do not attempt to repair the
engine coolant pump or replace individual
components.
CAUTION
Use a new special O-ring between the engine
coolant pump and the joint. Be sure to use the
special O-ring for each engine model. Although
the O-ring dimensions are the same as a
commercially available O-ring, the material is
different.