TK 61753-2-MM-EN
61
Figure 13. Plastic Expansion Tank
1. Expansion Tank
2. Cap
3. Coolant Level Switch
Testing the Coolant Level Switch
Testing the switch in the unit is accomplished by adjusting the coolant level or alternatively by removing the expansion
tank from the unit, then flipping the tank upside down or right side up (depending on the step from the procedure
below).
1. Remove the wire harness connector from the coolant level switch.
2. Use an ohmmeter to check the continuity of the switch at the connection pins.
3. Verify the coolant level is above the switch and check the continuity of the switch. The switch should be closed. If
the tank was removed from the unit, accomplish this check with the tank upside down.
4. Drain coolant from the expansion tank until the coolant level is well below the switch level and check continuity of
the switch. The switch should be open. If the tank was removed from the unit, accomplish this check with the tank
right side up.
5. Replace the switch if it is does not close in step 3 and does not open in step 4.
Checking the Float
The float is made of polypropylene foam. It is unlikely that the float would fail unless it sticks inside the tank so it cannot
move.
1. Verify the coolant level is above the float.
2. Slowly drain coolant from the expansion tank and watch the float. The float should drop with the coolant level.
3. If the float did not drop with the coolant level, remove the expansion tank from the unit.
4. Flip the expansion tank upside down and right side up to see if the float moves inside the expansion tank. Replace
the expansion tank with a new one if the float is stuck or does not move with the coolant level.
Replacing the Coolant Level Switch
1. Disconnect the wire harness connector from the coolant level switch.
2. Pull the coolant level switch straight down to remove it from the tank. It may be necessary to use a small pry bar or
screwdriver. Take care to avoid damage to the tank or switch.
3. Place the new coolant level switch in the tank and press it straight up until it snaps into place. Check to make sure it
is securely in place.
4. Connect the wire harness connector to the coolant level switch.
Engine Fuel System
The components of the fuel system are:
• Fuel tank
EEnnggiinnee MMaaiinntteennaannccee
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