Yanmar 4TNV98, Service Manual

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4TNV98 & 4TNE98 Diesel Engine Section 2. Periodic Maintenance 59
Every 1000 Hours of Operation
Perform the following maintenance every 1000
hours of operation.
• Drain, Flush and Refill Cooling System With New
Coolant
• Adjust Intake/Exhaust Valve Clearance
Drain, Flush and Refill Cooling System With
New Coolant
DANGER
SCALD HAZARD!
NEVER remove the radiator cap if the engine is
hot. Steam and hot engine coolant will spurt out
and seriously burn you. Allow the engine to
cool down before you attempt to remove the
radiator cap.
Tighten the radiator cap securely after you
check the radiator. Steam can spurt out during
engine operation if the cap is loose.
ALWAYS check the level of the engine coolant
by observing the reserve tank.
Failure to comply will result in death or serious
injury.
WARNING
BURN HAZARD!
Wait until the engine cools before you drain the
engine coolant. Hot engine coolant may splash
and burn you.
Failure to comply could result in death or
serious injury.
CAUTION
COOLANT HAZARD!
Wear eye protection and rubber gloves when
you handle long life or extended life engine
coolant. If contact with the eyes or skin should
occur, flush eyes and wash immediately with
clean water.
Failure to comply may result in minor or
moderate injury.
CAUTION
ALWAYS be environmentally responsible.
Follow the guidelines of the EPA or other
governmental agencies for the proper disposal
of hazardous materials such as engine oil,
diesel fuel and engine coolant. Consult the local
authorities or reclamation facility.
NEVER dispose of hazardous materials
irresponsibly by dumping them into a sewer, on
the ground, or into ground water or waterways.
Failure to follow these procedures may
seriously harm the environment.
Engine coolant contaminated with rust or scale
reduces the cooling effect. Even when extended life
engine coolant is properly mixed, the engine
coolant gets contaminated as its ingredients
deteriorate. Drain, flush and refill the cooling
system with new coolant every 1000 hours or once
a year, whichever comes first.
1. Allow engine and coolant to cool.
2. Remove the radiator cap (Figure 5-16, (1)).
3. Remove the drain plug or open the drain cock
(Figure 5-16, (2)) at the lower portion of the
radiator and drain the engine coolant.