Arctic Cat Altera 300, Service Manual

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70
7. Start the engine and run for 3-5 minutes; then check
coolant level in the radiator and in the coolant over-
flow tank and add as required to the appropriate lev-
els.
KM339A
KM136A
8. Install the cover and rack (see Steering/Body/Con-
trols - Front Rack/Body Panel/Fender).
Hoses/Thermostat
REMOVING
1. Drain approximately one U.S. qt of coolant from the
cooling system.
2. Remove the two machine screws securing the ther-
mostat housing cover to the thermostat housing.
Account for an O-ring and a thermostat.
INSPECTING
1. Inspect the thermostat for corrosion, wear, or spring
damage.
2. Using the following procedure, inspect the thermo-
stat 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.
INSTALLING
1. Place the thermostat and O-ring into the thermostat
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.
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.
Water Pump
REMOVING/DISASSEMBLING
1. Drain the coolant.
2. Remove the four cap screws securing the water
pump case. Account for the gasket and two align-
ment pins.
3. Remove the impeller, washer, and seal washer.
4. Remove the mechanical seal using the following pro-
cedure.
A. Tap the tip of a small sheet metal screw into the
inner-metal edge of the seal.
B. Grip the screw with a pair of vise-grip pliers and pull
the seal out. Account for the pump drive seal.
CLEANING AND INSPECTING
1. Clean all pump components in parts-cleaning sol-
vent.
2. Inspect the mechanical seal and pump drive seal for
damage.
 NOTE: If the mechanical seal and/or pump drive
seal are damaged, they must be replaced as a set.
3. Inspect the impeller for corrosion or damage.
ASSEMBLING/INSTALLING
 NOTE: Treat seals and O-rings with clean anti-
freeze for initial lubrication.
1. Press the seal washer into the impeller by hand.
2. Install the water pump drive seal; then drive the
mechanical seal into the crankcase cover using an
appropriate seal driver.