2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 339Get this manual

2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 339

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COOLING SYSTEM

18.Bleed the air from the cooling system19.Inspect: Cooling system Decrease of pressure (leaks) Repair as required
Inspection steps: Attach the cooling system tester