Download Komatsu PC360-7 Hydraulic Excavator Service Shop Manual –

Replacing the heater core on a Komatsu PC360-7 Hydraulic Excavator involves several steps and requires specific tools and equipment. click here for more details on the download manual…..

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Below are the detailed descriptions of each tool needed and the step-by-step process for replacement:

### Tools and Equipment Needed:

– **Socket Set**: A comprehensive set including various sizes (metric) will be necessary for removing bolts and nuts securely. Common sizes include 10mm, 12mm, and 14mm.

– **Wrench Set**: Both adjustable and fixed wrenches to help with securing and loosening various fittings.

– **Screwdriver Set**: A variety of flathead and Phillips screwdrivers will be useful for removing covers and clamps.

– **Pliers**: Needle-nose and standard pliers for gripping and pulling hoses.

– **Pry Bar**: A small pry bar can help in separating components that may be stuck or tightly fitted.

– **Coolant Drain Pan**: To catch any coolant that will be drained from the system during the process.

– **Rags or Towels**: For cleaning up any spills, wiping down surfaces, and keeping your workspace tidy.

– **Torque Wrench**: To ensure all bolts are tightened to the manufacturer’s specifications during reassembly.

– **Replacement Heater Core**: Ensure that you have the correct part number for the heater core specific to the Komatsu PC360-7.

– **Sealant or Gasket Maker**: depending on the design of the connections, you may need sealant for any gaskets or joints to prevent leaks.

### Replacement Process:

– **Preparation**:
– Make sure the excavator is parked on a flat surface, and the engine is cool to avoid burns.
– Disconnect the battery to prevent any electrical issues while replacing the heater core.

– **Drain Coolant**:
– Place a coolant drain pan under the radiator and open the drain valve to remove coolant from the system.
– Allow the coolant to fully drain before proceeding.

– **Remove Access Panels**:
– depending on the design of the excavator, you may need to remove access panels or covers that shield the heater core.
– Use the socket and screwdriver set to carefully remove any screws or bolts.

– **Disconnect Hoses**:
– Locate the hoses connected to the heater core. These are typically rubber hoses leading from the engine’s coolant system.
– Use pliers to loosen any clamps and carefully pull the hoses off the heater core. Be cautious as some residual coolant may leak out.

– **Unbolt the Heater Core**:
– Identify the bolts securing the heater core in place. Using the socket set, remove these bolts.
– Gently wiggle and pull the heater core out of its housing. If it’s stuck, use a pry bar carefully to assist in removal.

– **Inspect and Clean**:
– Before installing the new heater core, inspect the housing for any debris or corrosion. Clean the area thoroughly to ensure a good seal with the new heater core.

– **Install New Heater Core**:
– Position the new heater core into the housing carefully. Ensure it fits snugly and aligns with the bolt holes.
– Reinstall the bolts using the torque wrench to tighten them to the specified torque settings from the manufacturer.

– **Reconnect Hoses**:
– Reattach the coolant hoses to the new heater core, ensuring they are seated properly.
– Secure them with the clamps, ensuring no leaks will occur.

– **Reassemble Access Panels**:
– Replace any access panels or covers that were removed earlier, securing them with screws and bolts.

– **Refill Coolant**:
– Refill the coolant system with the appropriate type of coolant for the excavator.
– Check for any air pockets by running the engine and allowing it to reach operating temperature.

– **Reconnect Battery**:
– After everything is reassembled and checked, reconnect the battery.

– **Test the System**:
– Start the excavator and check for any leaks around the heater core area.
– Test the heater to ensure it is working correctly and providing heat as expected.

### Final Checks:

– **Clean Up**:
– remove the coolant drain pan and dispose of any used coolant properly.
– Clean your tools and workspace to maintain a safe working environment.

By following these steps and using the appropriate tools, you can successfully replace the heater core on a Komatsu PC360-7 Hydraulic Excavator. Always refer to the manufacturer’s manual for any specific instructions or torque specifications related to your machine.
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