Cooling Fan Thermo-Switch Inspection - Suzuki kq750 Service Manual

Installation
Install the cooling fan thermo-switch in the reverse order
of removal. Pay attention to the following points:
• Apply engine coolant to the O-ring.
CAUTION
!
Replace the removed O-ring with a new one.
• Tighten the cooling fan thermo-switch to the specified
torque and connect the coupler (1).
Tightening torque
Cooling fan thermo-switch (a): 17 N·m (1.7 kgf-m,
12.5 lb-ft)
• Pour engine coolant. Refer to "Cooling System
Inspection in Section 0B (Page 0B-15)".
• Bleed air from the cooling circuit. Refer to "Cooling
System Inspection in Section 0B (Page 0B-15)".
I831G1160026-01
1
(a)
I831G1160065-01
Engine Cooling System:

Cooling Fan Thermo-switch Inspection

Inspect the cooling fan thermo-switch in the following
procedures:
1) Remove the cooling fan thermo-switch. Refer to
"Cooling Fan Thermo-switch Removal and
Installation (Page 1F-9)".
2) Check the thermo-switch closing or opening
temperatures by testing it at the bench as shown in
the figure.
3) Connect the thermo-switch (1) to a circuit tester and
place it in the water "A" contained in a pan, which is
placed on the stove.
4) Heat the water to raise its temperature slowly and
read the column thermometer (2) when the switch
closes or opens. If any abnormality is found, replace
the cooling fan thermo-switch with a new one.
CAUTION
!
• Take special care when handling the
cooling fan thermo-switch. Do not subject
it to strong blows or allow it to be dropped.
• Do not contact the cooling fan thermo-
switch (1) and the column thermometer (2)
with a pan.
Special tool
: 09900–25008 (Multi-circuit tester set)
Tester knob indication
Continuity test (
Cooling fan thermo-switch operating
temperature
Standard (OFF → ON): Approx. 93 °C (199 °F)
Standard (ON → OFF): Approx. 87 °C (189 °F)
5) Reinstall the cooling fan thermo-switch. Refer to
"Cooling Fan Thermo-switch Removal and
Installation (Page 1F-9)".
B831G21606013
I705H1160033-03
)
1F-10