Removal
Remove the cowling. (7-5)
Drain the engine coolant. (2-18)
Disconnect the cooling fan thermo-switch lead wire coupler (1).
Remove the cooling fan thermo-switch (2).
Inspection
Check the thermo-switch closing or opening temperatures by testing it at the bench as shown in the figure. Connect the thermo-switch (1) to a circuit tester and place it in the OIL contained in a pan, which is placed on a stove.
Heat the oil to raise its temperature slowly and read the column thermometer (2) when the switch closes or opens.
- 09900-25008: Multi circuit tester set
- Tester knob indication: Continuity test (•)))
Cooling fan thermo-switch operating temperature:
- Standard (OFF→ON): Approx. 98°C (208°F)
- Standard (ON→OFF): Approx. 92°C (198°F)
Caution!
- Take special care when handling the thermo-switch. It may cause damage if it gets a sharp impact.
- Do not contact the cooling fan thermo-switch (1) and the column thermometer (2) with a pan.
Installation
Install a new O-ring (1) and apply engine coolant to the O-ring.
Tighten the cooling fan thermo-switch to the specified torque.
- Cooling fan thermo-switch: 17 N·m (1.7 kgf·m, 12.5 lb·ft)
Pour engine coolant. (2-18)
Bleed air from the cooling circuit. (2-19)
Install the cowling. (7-8)