COGENG KHR10750 ECU Sumitomo SH200A3 SH210-3

Product Parameter Table

PRODUCT OVERVIEW

The COGENG Control Panel, identified by primary part number KHR10750 and its associated cross-reference numbers 181510-7810, 407915-5810, and KRH10660, represents the definitive master electronic controller for the Sumitomo SH-3 and A3 series hydraulic excavator platform. This unit is the single most critical electronic component on the machine, functioning as the real-time computational bridge between the operator's commands and the machine's powerful hydraulic system. Without a fully functional KHR10750, the excavator loses its ability to intelligently manage pump flow, resulting in catastrophic performance failure characterized by a single-speed crawl, total loss of digging power, or a completely dead machine that will not start.

This controller is engineered to solve a fundamental challenge in mid-generation excavator design: the precise, lossless translation of analog operator intention into digital pump control. Inside its rugged, glass-filled nylon housing, the KHR10750 contains a dedicated 32-bit microcontroller executing a fixed, non-updatable firmware map specifically calibrated for the hydraulic and engine characteristics of the SH120-3, SH200-3, SH210-3, SH300-3, and SH200A3 models. It continuously monitors a constellation of sensors—including dual high-pressure pump discharge sensors, negative control pressure transducers, engine speed pickup, throttle dial voltage, and pilot pressure switches—and uses this data to calculate and output high-frequency Pulse Width Modulation (PWM) signals. These signals directly command the electro-proportional solenoid valves mounted on the main hydraulic pumps, controlling the swash plate angle and therefore the machine's speed and power. The KHR10750 also manages essential auxiliary logic, including the swing parking brake release, travel straight-line compensation, and one-touch idle deceleration. COGENG's aftermarket version is manufactured with upgraded input filtering capacitors and a thicker, military-grade conformal coating on the printed circuit board, specifically targeting the root causes of OEM failures: voltage spike damage and moisture-induced corrosion. This is a direct plug-and-play replacement; simply bolt it in, connect the harness, and the machine is ready to return to full productivity.

COMPATIBLE EXCAVATORS

This controller is designed for the Sumitomo -3 and A3 series excavator platform. Please verify your machine's data plate before ordering.

PARTS LIST (Included in Package)

Each KHR10750 controller package includes the following items, packed in a protective shipping carton:

1. Main Controller Assembly (1 unit): The primary electronic control unit, pre-assembled with its composite housing, internal PCB, and integrated aluminum heatsink. Part number label clearly affixed to the housing exterior.

2. Integral Multi-Pin Connector Interface: The female socket is integrated into the controller housing itself. It features gold-plated, solid-machined pins arranged in the OEM-standard configuration, ready to receive the machine's existing wiring harness plug.

3. Vibration Isolation Mounting Grommets (4 pieces): Pre-installed in the controller's four corner mounting ears. These rubber bushings absorb high-frequency chassis vibration to protect internal solder joints.

4. Anti-Static ESD Shielding Bag: The controller is sealed inside a silver metallicized polyethylene bag to prevent electrostatic discharge damage during handling and transit.

5. Protective Foam Cocoon (Top and Bottom Shells): Custom-cut, high-density polyurethane foam inserts encase the controller on all six sides within the shipping carton, providing maximum shock absorption.

DECOMPOSE PICTURES (VISUAL REFERENCE GUIDE)

Note: The following descriptions provide a detailed technical walkthrough of high-resolution product images.

Image 1: Full Assembly — Front Connector Face
This image presents a direct head-on view of the KHR10750 controller's connector face. The dominant feature is the large rectangular multi-pin socket, recessed into the matte-black composite housing. The socket contains rows of precisely aligned, gold-plated female pin receptacles. A continuous, raised gasket track surrounds the connector perimeter; this is the primary environmental seal against dust and water spray when the harness plug is locked in place. On either side of the connector are two stainless steel threaded inserts—these receive the wiring harness plug's locking screws, ensuring a positive mechanical connection immune to vibration. The unit's identification label is visible on the top surface of the housing, laser-marked with the part number KHR10750, associated cross-reference numbers, serial number, and a QR code for batch traceability.

Image 2: Full Assembly — Rear Heatsink View
The unit is shown inverted, revealing the die-cast aluminum heatsink that forms the controller's back face. A grid of vertical fins maximizes surface area for passive convective cooling, drawing heat away from the power transistors and voltage regulators mounted directly to the internal side of this plate. The image labels a continuous rubber O-ring gasket seated in a machined groove around the heatsink perimeter—this is the seal that achieves the unit's high level of environmental integrity. Four corner mounting ears with pre-installed rubber grommets are clearly visible.

Image 3: Internal PCB — Component Side (Exploded View)
With the heatsink and housing cover removed, the main Printed Circuit Board (PCB) is exposed in a high-detail macro shot. Key components are highlighted with leader lines:

• Microcontroller Unit (MCU): A large, square surface-mount chip at the board's center, identified as a 32-bit industrial processor. This is the brain executing the real-time control firmware.

• PWM Driver Stage: A row of high-power MOSFET transistors mounted along one edge of the board, adjacent to the heatsink mounting surface. These are the output switches that drive the pump's proportional solenoids.

• Input Filtering Stage: Several large electrolytic capacitors and toroidal ferrite inductors near the power input pins. These components suppress voltage transients and alternator noise, a common cause of failure in OEM boards.

• Conformal Coating: A high-gloss, transparent layer is visible across all components and solder joints, confirming the board is sealed against moisture and corrosive atmospheric contaminants.

Image 4: Internal PCB — Solder Side & Connector Pins
The reverse side of the PCB is displayed, showing the through-hole solder terminations of the main connector pins. The image focuses on the large, uniform solder fillets anchoring each pin to the board. This through-hole construction is a deliberate design choice, providing vastly superior mechanical strength compared to the surface-mount connectors that are prone to cracking under vibration. The multi-layer copper ground and power planes are visible beneath the green solder mask.

COMPATIBILITY NOTES: CRITICAL VERIFICATION GUIDE

These notes are essential for ensuring you receive the correct controller for your machine. Incorrect installation can damage both the controller and the machine harness.

1. Multiple Part Numbers, One Controller: The part numbers KHR10750, 181510-7810, 407915-5810, and KRH10660 all refer to the same fundamental electronic control unit. Sumitomo and its component suppliers issued different part numbers over the production life of the -3 series for inventory management, minor firmware revisions, or dual-sourcing purposes. All four numbers are functionally and physically interchangeable. You can install a KHR10750 in a machine that previously had a 407915-5810 with complete confidence.

2. Strict Series Compatibility: This controller is for the Sumitomo SH-3 and A3 series only. The "A3" designation (e.g., SH200A3) represents a specific evolutionary step of the -3 platform, and this controller is fully compatible across both the straight -3 and A3 variants. This unit is NOT compatible with the earlier SH-2 series, nor the later SH-5, SH-6, or any newer Sumitomo models. The physical connector shape and electrical pinout are entirely different.

3. Case Model Cross-Compatibility (Important Distinction): While other controllers in the Sumitomo family (such as the KHR2680) are cross-compatible with specific Case models like the CX210 and CX350, the KHR10750 is generally specific to Sumitomo-branded excavators. Do not assume this controller will fit a Case machine without explicit physical verification of the connector and mounting dimensions.

4. Mandatory Pre-Order Visual Check: The most reliable method to guarantee compatibility is a visual comparison. Please take a clear, well-lit photograph of your failed controller's identification label and a separate photograph showing the pin layout of the machine's wiring harness plug. Send these to our sales team. We will perform a physical match against our stock before shipment, completely eliminating the risk of an incorrect part.

INSTALLATION DECOMPOSITION DIAGRAM

Note: This is a step-by-step procedural guide corresponding to a numbered visual installation diagram.

Step 1: Machine Preparation & Safety Lockout
The first diagram panel shows an excavator with a large red prohibition symbol over the battery compartment. Text instructions: "1. Park machine on level ground. 2. Lower all attachments to the ground. 3. Turn key OFF and remove from ignition. 4. Open battery compartment and disconnect the negative (-) battery cable. Wait 60 seconds for capacitive discharge."

Step 2: Accessing the Controller Compartment
A cutaway illustration of the excavator cab shows the location of the controller: behind the operator's seat under a removable black metal panel (for SH120-3, SH200-3, SH210-3) or inside the right-side electrical cabinet door (for SH300-3). The diagram shows removing two M6 retaining bolts and lifting off the access cover.

Step 3: Disconnecting the Old Controller
An exploded view zooms in on the failed KHR10750 in situ.

• Sub-step 3a: A magnified call-out circle shows the two Phillips-head or hex-head locking screws on the wiring harness connector. Arrows indicate turning counter-clockwise until fully loose.

• Sub-step 3b: An arrow shows grasping the connector body (never the wires) and pulling it straight outwards, perpendicular to the controller face. Do not rock or twist.

• Sub-step 3c: Four arrows indicate removing the corner mounting bolts that secure the controller to its bracket.

Step 4: Mounting the New COGENG Controller
The diagram shows the new KHR10750 being positioned into the mounting bracket.

• Sub-step 4a: Hand-start all four mounting bolts through the vibration grommets to avoid cross-threading.

• Sub-step 4b: A torque wrench icon with a specification: "Tighten evenly in a cross pattern to 8-10 Nm."

• Sub-step 4c: Inspect the harness connector for bent pins, debris, or moisture. Clean with electrical contact cleaner if necessary. A call-out suggests applying a thin film of dielectric grease to the connector seal.

Step 5: Reconnection, Power-Up, and Verification
The final panel illustrates the sequence:

• Push the harness connector firmly into the new controller until the seal seats fully. Tighten both locking screws evenly.

• Reconnect the battery negative cable.

• Turn the key to the ON position (do not start). Observe the instrument cluster. All warning lamps should illuminate briefly and then extinguish. The engine check lamp should turn off, indicating successful CAN bus communication between the new controller and the engine ECU.

• Start the engine. The diagram shows the engine idling smoothly with the throttle dial responsive. A final green checkmark icon reads: "Test all hydraulic functions slowly through full range. Verify smooth, proportional response without hesitation."

🚚 SHIPPING DETAILS & RETURN POLICY

Shipping Details

Return Policy

FREQUENTLY ASKED QUESTIONS

Q1: What is the relationship between KHR10750, 181510-7810, and 407915-5810?
A: These are all the same controller. The different numbers arose from Sumitomo's parts numbering system, supplier codes (e.g., DENSO or Nippon Seiki), and minor production revisions. They are 100% interchangeable in form, fit, and function across all listed SH-3 and A3 models. There is no need to match the number exactly—any of these numbers will work.

Q2: Will I need to reprogram anything after installing this controller?
A: No. This is a true plug-and-play unit. All operating parameters, pump calibration curves, and engine throttle maps are permanently stored in the controller's non-volatile flash memory. There is no dealer-level calibration, software installation, or laptop connection required. Simply install, connect, and start.

Q3: How do I know if my old controller is truly the problem?
A: Common symptoms of a failed KHR10750 include: complete no-start condition (engine cranks but will not fire, or no crank at all), engine starts but all hydraulic functions are extremely slow with no power (machine in permanent limp mode), intermittent shutdown while operating, or specific functions like swing or travel not working while the rest of the machine operates normally. Always check battery voltage, fuses, and harness connections before condemning the controller.

Q4: Is there a difference between the SH200-3 and SH200A3 controller?
A: No. The "A3" is an updated version of the -3 series, but the controller and its fundamental firmware map are identical. The KHR10750 is the correct part for both designations.

Q5: What is your shipping process for urgent breakdown orders?
A: We prioritize breakdown orders for immediate processing. If your order is placed and confirmed before 12:00 PM (noon) local time, we can typically ship the same day via DHL or FedEx International Priority. You will have a tracking number within hours. Please mark your inquiry as "URGENT MACHINE DOWN" to receive expedited service.

📞 CONTACT & ORDERING

For pricing, urgent breakdown assistance, bulk dealer orders, or technical pre-sales support, contact your COGENG supplier without delay.

Sales Price: Contact COGENG sales customer service directly for the most current competitive pricing. We offer tiered volume discounts for fleet operators and regional parts distributors. Request a quote today.
Shipping Method & Cost: We will quote the optimal shipping solution—balancing speed and cost—tailored to your specific location and urgency. Door-to-door DDP options are available for many countries.
Estimated Delivery Time: Transit time is based on the selected logistics carrier's published schedule. The delivery date shown on the carrier's tracking portal is the definitive reference. We provide tracking within 24 hours of dispatch.

✅ Direct OEM Replacement — No Reprogramming, No Calibration, True Plug & Play.
✅ Ruggedized Design — Upgraded internal components for superior resistance to voltage spikes and moisture.
✅ In Stock — Ready for immediate worldwide dispatch to minimize your machine downtime.

Immediate Action Required: Please provide your machine's exact model (e.g., SH200-3) and a photo of your old controller's label. This ensures 100% accurate compatibility verification.
Merchant Return Policy: All products shipped are not returnable or exchangeable. Please complete all compatibility checks before purchase confirmation.

Contact COGENG

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