Yamaha GRIZZLY 700 FI YFM7FGPW, Service Manual

Page: 267 / 485

5 - 6
COOL
THERMOSTAT
EBS00132
CHECKING THE THERMOSTAT
1. Check:
• thermostat
1
Does not open at 50 ~ 54 °C (122 ~
129.2 °F)
→
Replace.
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a. Suspend the thermostat in a container filled
with water.
b. Slowly heat the water.
c. Place a thermometer in the water.
d. While stirring the water, observe the ther-
mostat and thermometer’s indicated tem-
perature.
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1
Thermometer
2
Water
3
Thermostat
4
Container
È
Fully closed
É
Fully open
NOTE:
_
If the accuracy of the thermostat is in doubt,
replace it. A faulty thermostat could cause seri-
ous overheating or overcooling.
2. Check:
• thermostat housing cover
• thermostat housing (cylinder head)
Cracks/damage
→
Replace.
EBS00133
INSTALLING THE THERMOSTAT
1. Install:
• thermostat
1
• O-ring
2
• thermostat cover
3
NOTE:
_
Install the thermostat with its breather hole
a
facing up.
2. Fill:
• cooling system
(with the specified amount of the recom-
mended coolant)
Refer to “CHANGING THE COOLANT” in
chapter 3.
3. Check:
• cooling system
Leak
→
Repair or replace any faulty part.
New
1
2
3
a
LS
New