Yanmar 6LY3 series - Section 7 Coolant System

6LY3 Service Manual
7-1
© 2007 Yanmar Marine International
6LY3 Service Manual
Section 7
COOLANT SYSTEM
Page
Safety Precautions .......................................................................... 7-3
Introduction...................................................................................... 7-3
Coolant System Components and Functions .................................. 7-4
Coolant System Components.................................................... 7-5
Seawater Pump Components and Functions.................................. 7-6
Disassembling the Seawater Pump .......................................... 7-6
Inspecting the Seawater Pump ................................................. 7-7
Assembling the Seawater Pump .............................................. 7-8
Coolant Pump Components and Functions..................................... 7-9
Coolant System Components.................................................. 7-10
Disassembling the Coolant Pump .......................................... 7-11
Inspecting the Coolant Pump ................................................. 7-11
Heat Exchanger Components and Functions................................ 7-13
Heat Exchanger Components ................................................. 7-13
Disassembling the Heat Exchanger ........................................ 7-13
Inspecting the Heat Exchanger .............................................. 7-14
Pressure Cap Operation.......................................................... 7-14
Inspecting the Pressure Cap .................................................. 7-15
Coolant Recovery Tank Components and Functions.................... 7-16
Installing the Coolant Recovery Tank...................................... 7-16
Coolant Recovery Tank Precautions ....................................... 7-16
Thermostat Components and Functions ....................................... 7-17
Inspecting the Thermostat ...................................................... 7-18
Testing the Thermostat............................................................ 7-18
Seacock Components and Functions (Optional)........................... 7-19
Seacock Precautions.............................................................. 7-19
Inspecting the Seacock ........................................................... 7-19
Bilge Pump and Strainer Components and Functions (Optional).. 7-20