COOLING AND LUBRICATION SYSTEM 6-9
COOLING FAN THERMO-SWITCH
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 con-
tained in a pan, which is placed on a stove.
• Heat the oil to raise its temperature slowly and read the col-
umn 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)
(ON→OFF): Approx. 92 °C (198 °F)
!
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)
* 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.
]
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