Arctic Cat DVX 250 2007, Service Manual

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4-9
4
4. On the Utility model, install the front cover and
fender assembly; then install the front rack (see
Section 8).
5. Fill the cooling system with the recommended
amount of antifreeze. Check for leakage.
6. Connect the fan wiring to the main wiring har-
ness.
7. Start the engine and run for 3-5 minutes; then
check coolant level in the radiator and in the
coolant overflow tank and add as required to the
appropriate levels.
KM339A
KM136A
8. On the Utility model, install the cover and rack
(see Section 8).
Hoses/Thermostat
REMOVING
1. Drain approximately one U.S. qt of coolant from
the cooling system.
2. Remove the two machine screws securing the
thermostat housing cover to the thermostat
housing. Account for an O-ring and a thermo-
stat.
INSPECTING
„
NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.
1. Inspect the thermostat for corrosion, wear, or
spring damage.
2. Using the following procedure, inspect the ther-
mostat for proper operation.
A. Suspend the thermostat in a container filled
with water.
B. Heat the water and monitor the temperature
with a thermometer.
C. The thermostat should start to open at 78-82°
C (172-179° F) and should be full-open at
90° C (194° F).
D. If the thermostat does not open, it must be
replaced.
3. Inspect all coolant hoses, connections, and
clamps for deterioration, cracks, and wear.
„
NOTE: All coolant hoses and clamps should be
replaced every four years or 4000 miles.
INSTALLING
1. Place the thermostat and O-ring into the thermo-
stat housing; then secure the thermostat housing
cover to the thermostat housing with the two cap
screws. Tighten securely.
2. Fill the cooling system with the recommended
amount of antifreeze. Check for leakage.
Fan
REMOVING
1. Remove the radiator (see Radiator in this sec-
tion).
2. Remove the fan assembly from the radiator.
INSTALLING
1. Position the fan assembly on the radiator; then
secure with existing hardware.
2. Install the radiator (see Radiator in this section).
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