Installation of a Computer Delete Kit for Hitachi EX100-2 Excavators

[MikePhua]

In the world of heavy machinery, the need to modify or upgrade certain systems is not uncommon. The Hitachi EX100-2, a popular excavator model, is known for its durability and reliability in a variety of construction and mining applications. However, some owners may want to install a "computer delete kit" to address specific operational issues, improve performance, or comply with new regulations. This article will guide you through the process of understanding and installing a computer delete kit for a Hitachi EX100-2, explaining the importance of such modifications and providing tips for a successful installation.
What is a Computer Delete Kit?
A computer delete kit refers to a set of components designed to disable or bypass the onboard computer system of a machine. In the context of the Hitachi EX100-2, this typically involves bypassing certain electronic control systems, such as the engine control unit (ECU) or the transmission management system, that regulate performance and emissions.
These kits are often sought for a few reasons:

• Improved Performance: In some cases, the stock ECU settings may limit the power output of the engine or restrict performance in certain conditions. A delete kit may unlock additional power and torque by removing such limitations.
  
• Addressing Faults: Some owners opt for a delete kit if they are facing issues with the original computer system, such as frequent fault codes or problematic sensor readings that may be difficult or expensive to repair.
  
• Emission Control Compliance: In some regions, emissions regulations have become more stringent. Certain delete kits may be used to bypass emission control systems to avoid costly repairs or avoid compliance issues in areas with less rigorous regulations.
  

Why Would You Install a Computer Delete Kit on a Hitachi EX100-2?
The Hitachi EX100-2 is a well-built excavator that can handle a wide variety of tasks. However, owners may encounter certain performance limitations tied to the machine's factory-installed software or electronic systems. These limitations could include:

• Throttle Limiting: The ECU may restrict the throttle response in certain conditions, leading to a less responsive machine.
  
• Sensor or ECU Malfunctions: As with any complex machinery, electronic components can fail over time, leading to recurring sensor issues or diagnostic trouble codes.
  
• Excessive Regeneration Cycles: If your machine is equipped with a diesel particulate filter (DPF), you may experience long or frequent regeneration cycles that can cause downtime and reduce efficiency.
  

While a delete kit may not always be necessary for every user, it may be a solution for those dealing with persistent issues that are difficult to fix through conventional means.
Before You Install: Considerations and Warnings
Before proceeding with the installation of a computer delete kit, there are a few important factors to keep in mind:

1. Legal Implications: In many countries, tampering with emissions systems or bypassing certain control systems can lead to legal issues, especially in regions where emissions standards are strictly enforced. Always check local regulations before modifying your machine.
   
2. Machine Warranty: Installing a delete kit may void any warranty that is still active on your Hitachi EX100-2. If you are working under a warranty, consider consulting with the manufacturer or an authorized dealer before making any modifications.
   
3. Technical Expertise: The process of installing a computer delete kit requires advanced mechanical and electrical knowledge. If you're not comfortable with disassembling or modifying the machine’s electronic systems, it's advisable to hire a professional technician who specializes in heavy equipment.
   
4. Compatibility: Ensure that the delete kit is specifically designed for the Hitachi EX100-2 model. Kits designed for other models may not fit or work as intended, potentially causing further issues.
   

Installation Process of the Computer Delete Kit
Installing a computer delete kit on a Hitachi EX100-2 involves several steps, ranging from removing the stock ECU components to connecting the delete kit's bypass wiring. Here’s a general overview of the process:
Step 1: Preparation

• Tools Required: The installation will require basic hand tools such as wrenches, screwdrivers, and a multimeter. You may also need a diagnostic tool to clear any existing fault codes before starting.
  
• Machine Safety: Always ensure the machine is powered down and isolated from any electrical sources to prevent accidental shorts or electric shocks.
  
• Disconnect the Battery: Before working on the electrical systems, disconnect the battery to avoid any accidental power surges or short circuits.
  

Step 2: Removing the ECU

• Locate the ECU: In the Hitachi EX100-2, the ECU is typically located in the engine compartment or under the operator's seat. Refer to the machine's manual for exact positioning.
  
• Unplug the ECU: Once located, carefully unplug the ECU from its wiring harness. Take note of the wiring setup, as this will help with connecting the delete kit later.
  
• Remove Mounting Bolts: The ECU is usually secured with mounting bolts. Use your wrench to remove these bolts and take out the ECU unit.
  

Step 3: Installing the Delete Kit

• Connect the Delete Kit: The delete kit will come with a replacement module or bypass connectors designed to replicate the ECU’s functions. Carefully follow the instructions that came with your kit to install the new components.
  
• Wiring: Depending on the kit, you may need to connect the new module to the machine's wiring. Ensure that all connections are secure and that the wires are routed to avoid any potential wear or damage.
  
• Sensor Bypass: If your delete kit includes bypassing certain sensors, such as the exhaust gas recirculation (EGR) or the DPF sensors, ensure that the bypass plugs are properly installed and the circuit is complete.
  

Step 4: Final Checks and Reassembly

• Reconnect the Battery: After the delete kit is installed, reconnect the battery and check the system for any potential electrical issues.
  
• Clear Fault Codes: Use a diagnostic tool to clear any stored error codes from the ECU. This ensures that the machine's onboard systems are properly reset and functioning.
  
• Test Run: Perform a test run to verify that the machine operates as expected. Pay close attention to performance, especially when idling or under load, to ensure the delete kit has not caused any unintended issues.
  

Step 5: Post-Installation Maintenance

• Monitor Performance: After installation, monitor the performance of your Hitachi EX100-2 closely. Check for any new fault codes or performance discrepancies that may arise.
  
• Regular Maintenance: Although a delete kit may address some issues, the machine will still require regular maintenance, including oil changes, air filter replacements, and hydraulic checks.
  

Potential Benefits and Risks of Using a Computer Delete Kit
Benefits:

• Improved Power and Efficiency: By removing throttling restrictions and sensor-based limitations, your Hitachi EX100-2 may exhibit improved power and faster response times.
  
• Reduced Maintenance Costs: A delete kit can help mitigate recurring issues with the ECU or sensor malfunctions, potentially reducing repair costs.
  

Risks:

• Legal Issues: If your machine is required to meet emissions standards, using a delete kit could result in legal consequences.
  
• Reduced Resale Value: Machines that have been modified with delete kits may be harder to sell, especially to buyers who require compliance with environmental regulations.
  
• Increased Wear: Removing certain control systems, such as the EGR or DPF, could lead to increased engine or component wear, as these systems help to manage exhaust temperatures and prevent soot buildup.
  

Conclusion: Is a Computer Delete Kit Right for You?
Installing a computer delete kit for the Hitachi EX100-2 can provide performance benefits, but it’s crucial to weigh the potential risks. If you're experiencing frequent ECU-related issues or performance restrictions, a delete kit may be a practical solution. However, always consider legal regulations, warranty conditions, and the technical expertise required before proceeding with such modifications.
In the end, the decision to install a computer delete kit should be based on a thorough assessment of your machine's needs, local regulations, and the long-term impact on performance and maintenance.