This article Caterpillar 311F LRR - JFT Crawler Excavator Water temperature regulator

Removal and Installation


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Removing steps





pay attention to



Keep all the parts clean without impurities.

Impurities can cause rapid wear and shorten component life.



pay attention to

When inspecting, maintaining, testing, adjusting and repairing products, be careful to ensure that the liquid is held in the container. Before opening any chamber or disassembling any part with stored storage.



Dispose of all liquids in accordance with local regulations and instructions.





1. Remove the coolant from the cooling system into the appropriate container to a liquid level below the water temperature regulator for preservation or disposal

coolant liquid. For the correct discharge steps, refer to the Operation and Maintenance Manual, "Cooling System Coolant-Replacement".


2. Remove the exhaust gas bypass valve regulator valve. For the correct steps, see Disassembling and assembling the exhaust gas bypass valve solenoid, "-Removing and installing".



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3. Release the hose clip on the radiator hose, and then disconnect the radiator hose hose from the water temperature regulator housing (1).

4. Release the clamp (3) and disconnect the exhaust recirculation (EGR) cooler hose (2) from the water temperature regulator housing (1). Position the EGR cooler hose away from the water temperature regulator housing.

5. Slide the lock piece into the unlock position and disconnect the wire harness from the coolant temperature sensor (4).

6. Remove the bolts (6) and the bolts (7) from the water temperature regulator housing (1).

7. Remove the water temperature regulator housing from the cylinder head (1).

8. Remove the gaskets (5) (not shown).

9. Remove the coolant temperature sensor, if necessary. For the correct steps, see Disassembly and Assembly, " Coolant Temperature

Degree sensor-Removing and installing "".


Installation steps


pay attention to

Keep all the parts clean without impurities.

Impurities can cause rapid wear and shorten component life.


1. Ensure that all parts are clean and free from wear and damage. If necessary, replace all worn or damaged parts.

2. Check whether the water temperature regulator works normally. See System Operation, Testing, and Adjustment, " Water Temperature Regulator-Test

Try " to understand the steps to test the water temperature regulator. If the water temperature regulator is not working properly, the entire component must be replaced.

3. Install the coolant temperature sensor, if necessary. For the correct steps, see Disassembly and Assembly, "Coolant Temperature Sensor-Removing and Installing."






Typical example


4. Position the gasket (5) (not shown) on the water temperature regulator housing (1).

Note: Ensure that the sealing cushion is facing correctly.

5. Install the bolts (7) on the water temperature regulator housing (1).

6. Position the water temperature regulator housing (1) to the cylinder head.

7. Install the bolts (6) on the water temperature regulator housing and tighten them by hand.

8. Tighten the bolts (6), and bolts (7) to a torque of 25 N·m (221 lbin).

9. Connect the hose (2) to the water temperature regulator housing and firmly tighten the clamp (3).

10. Connect the upper radiator hose to the water temperature regulator housing (1), and firmly tighten the hose clamp.

11. Connect the wire harness to the coolant temperature sensor (4). Slide the lock piece into the locking position.

12. Install the exhaust gas bypass valve solenoid valve. For the correct steps, see Disassembling and assembling the exhaust gas bypass valve solenoid, "-Removing and installing".

13. Fill the cooling system to the correct liquid level. Refer to the Operation and Maintenance Manual, "Cooling System Coolant-Check" and the Operation and Maintenance Manual, "Cooling System Coolant-Replace" for the correct filling steps.

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