COOLING AND LUBRICATION SYSTEM 5-9
COOLING FAN THERMO-SWITCH
REMOVAL
• Remove the cowling. (#6-6)
• Drain engine coolant. (#2-17)
• 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. 105°C (221°F)
(ON→
→→
→OFF): Approx. 100°C (212°F)
!
INSTALLATION
• Install a new O-ring
1.
• 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. (#2-17)
• Install the cowling. (#6-6)
Oil
]
* 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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