Yanmar 3TNV88F Service Manual page 143

EGR system
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
Coolant Hazard!
• Failure to comply may result in minor or
moderate injury.
NOTICE
When it is necessary to replace an EGR valve, be
sure to replace the entire EGR valve assembly.
Neither attempt to disassemble and repair the EGR
valve, nor replace its individual components.
NOTICE
The EGR system uses steel gaskets at the joints
between its components/parts. These steel gaskets
are specific to the respective joints. When you
remove the system's components/parts and
reinstall them, replace the steel gaskets between
them with new correct ones.
3TNV88F Service Manual
• 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.
1. Drain the engine cooling water.
2. Remove the battery cable from the battery's
minus (-) terminal.
3. If there is any additional equipment (such as an
air cleaner) installed above the EGR valves,
remove it in advance.
4. Remove the EGR valve connectors.
5. Disconnect the cooling water inlet and outlet
hoses from each EGR valve by loosening the
hose clips. When loosening the clips, put waste
cloth or the like beneath the hose joints in case
water leaks.
6. Loosen the nuts in the coupling flanges of the
exhaust manifold and the EGR pipe.
7. Loosen the bolts in the coupling flanges of the
EGR pipe and EGR valve, and remove the EGR
pipe.
1
1 – EGR pipe
Figure 6-104
8. Remove the EGR valve.
ENGINE
046362-00X00
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