93
MAINTENANCE
Cooling System
Bleeding the Cooling System
CAUTION!
Steam and hot liquids will cause burns to your skin. Never bleed the
cooling system or remove the pressure cap when the engine is warm or hot.
Use of a non-standard pressure cap will not allow the recovery system to
function properly. If the pressure cap needs replacement, contact your
dealer for the correct part.
NOTICE:
If coolant flow becomes restricted or plugged, coolant loss, air lock or
engine damage may result. Most cooling systems are equipped with a
filter that should be periodically inspected or replaced.
Perform the bleeding procedure when the engine is cold.
1. Position the vehicle so that the top of the tunnel is level. Elevate the
front of the vehicle slightly if necessary.
2. Remove the pressure cap and fill the coolant bottle with properly
mixed coolant to the maximum mark.
3. Remove the bleed screw from the water outlet manifold and/or the
thermostat housing. Allow the coolant to bleed through the system
until it runs out the bleed holes. Reinstall the bleed screw into the
manifold.
4. Add coolant to the coolant bottle to the maximum mark.
5. Start the engine and run at a fast idle for two to three minutes.
Loosen the bleed screw occasionally to purge any trapped air.
6. Stop the engine and check the coolant bottle level. Fill as required.
7. Feel the heat exchangers under the running boards. (On SWITCH-
BACK models, feel the tunnel gripper coolers on both sides.) If the
system is bled properly, they'll be warm to the touch. If they're not,
repeat step 5. Lift the front of the machine slightly to assist in the
bleeding.
8. Replace the pressure cap and carefully lower the front end of the
machine.
