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REPLACEMENT OF MAIN COMPONENTS
5. Loosen the drain plug cap, and drain engine coolant
from the engine.
NOTE) It makes draining easier to insert a hose with
approximately 1/4 inch (7 mm) inner diameter
into the drain plug.
6. Remove the 2 engine coolant hoses and the breather
hose from the exhaust air heat exchanger.
7. Unscrew a bolt connecting the thermostat to the
outdoor unit, and separate the thermostat.
8. Disconnect each wire harness.
1) Disconnect 2 wire harnesses from the starter.
2) Disconnect 2 relay connectors of the gas mixer wire
harness.
3) Disconnect 2 connectors from the engine speed
sensor.
4) Disconnect a relay connector of engine oil pressure
switch wire harness.
5) Disconnect a relay connector for the igniter.
6) Disconnect a relay connector of the engine coolant
temperature sensor wire harness.
Drain plug
Breather hose
Engine coolant hoses
Exhaust air heat exchanger
Thermostat
Bolt
Gas mixer
Starter
Engine speed sensors
Engine oil pressure switch
Engine coolant
temperature
sensor
Igniter
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