Yanmar 3TNV82A Service Manual page 261

Before You Begin Servicing COOLING SYSTEM
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.
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TNV DI Service Manual
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