Yamaha YFM660FS, Supplementary Service Manual

Page: 464 / 478

9 - 50
– +
ELEC
COOLING SYSTEM
C0NTINUITY
GOOD
CONDITION
6.Thermo switch 2
●
Remove the thermo switch 2 from the
radiator.
●
Connect the pocket tester (
Ω ×
10) to the
thermo switch 2
1
.
●
Immerse the thermo switch 2 in coolant
2
.
●
Check the thermo switch 2 for continuity.
While heating the coolant use a thermome-
ter
3
to record the temperatures.
Test
step
Water temperature
Good
condition
Thermo switch 2
1
Less than 75 ± 3 °C
(167 ± 5.4 °F)
×
2
More than 75 ± 3 °C
(167 ± 5.4 °F)
3*
More than 68 °C
(154.4 °F)
4*
Less than 68 °C
(154.4 °F)
×
Tests 1 & 2; Heat-up tests
Tests 3* & 4*; Cool-down tests
: Continuity
×
: No continuity
WARNING
Handle the thermo switch 2 with special
care.
Never subject it to a strong shock or
allow it to be dropped. Should it be
dropped, it must be replaced.
T
R
.
.
Thermo switch 2:
28 Nm (2.8 m • kg, 20 ft • lb)
Three bond sealock
®
#10
*
*
BAD CONDITION
Replace the thermo switch 2.