| Parameter | Specification |
|---|---|
| Product Name | Komatsu Wheel Loader Air Conditioning Condenser / HVAC Heat Exchanger |
| Primary Part Number | 425-07-21530 |
| Brand | COGENG (Premium Aftermarket Replacement) |
| Condition | Brand New, 100% Pressure Tested and Leak Verified |
| Core Compatibility | Komatsu WA320-3, WA350-3A, WA380-3, WA400-3A, WA450-3, WA470-3 Wheel Loaders |
| Component Type | Parallel Flow Micro-Channel Aluminum Condenser Coil Assembly |
| Core Dimensions | OEM-Standard Width x Height x Thickness (Exact Drop-In Fitment Guaranteed) |
| Core Material | High-Efficiency Multi-Port Extruded Aluminum Flat Tubes with Louvered Aluminum Fins |
| Header / Manifold Material | Extruded Aluminum Cylindrical Headers with Internal Baffle Plates for Optimized Refrigerant Distribution |
| Side Support / Frame Material | Corrosion-Resistant Aluminum Side Channels with Integrated Mounting Brackets |
| Connection Type | OEM-Standard Male O-Ring / Flare Fitting Inlet and Outlet Ports (R-134a Compatible) |
| Refrigerant Compatibility | R-134a (HFC-134a) — Fully Compatible with OEM System Specification |
| Operating Pressure Rating | Maximum Working Pressure: 3.5 MPa (35 bar / 508 psi) Refrigerant Side; Burst Pressure: > 10.5 MPa |
| Heat Rejection Capacity | Matches or Exceeds OEM Performance Specification for Cabin Cooling Under Maximum Ambient Heat Load |
| Fin Density | Optimized Louvered Fin Design for Maximum Heat Transfer Surface Area with Minimal Air-Side Pressure Drop |
| Surface Treatment | Corrosion-Resistant Clear Chromate Conversion Coating with Optional High-Temperature Powder Coat Paint (Black) for Enhanced Environmental Durability |
| Quality Assurance | 100% Helium Mass Spectrometer Leak Test; High-Pressure Burst Test on Batch Samples; Visual Inspection for Fin Integrity and Solder Joint Quality |
| Certification | ISO 9001 Certified Manufacturing Facility |
| Place of Origin | Guangdong, China |
| Shipping Weight | 5.5 kg (Gross, approximate — varies by model application) |
| Package Dimensions | 75 x 55 x 15 cm (Flat-Packed in Reinforced Protective Carton) |
| Packing | Inner: Protective Polyethylene Bag with Desiccant; Outer: Heavy-Duty Double-Wall Corrugated Carton with Molded Paper Corner Protectors and High-Density Foam Edge Guards; Fragile — Handle with Care Labeling |
| Payment Terms | Western Union, L/C (Letter of Credit), T/T (Telegraphic Transfer), MoneyGram, D/A (Documents against Acceptance), D/P (Documents against Payment) |
| Shipping Mode | By Air, By Sea, By Express (FedEx, UPS, DHL, TNT, etc.) — Optimized Based on Cargo Situation and Destination |
| Minimum Order Quantity | Acceptable Trial Order — Single Unit Orders Welcome |
| Return Policy | Non-Returnable / Non-Exchangeable (Comprehensive DOA Guarantee Included) |
The COGENG Air Conditioning Condenser, part number 425-07-21530, is a precision-manufactured, high-efficiency heat exchanger engineered as a direct, form-fit-function replacement for the Komatsu WA320-3, WA350-3A, WA380-3, WA400-3A, WA450-3, and WA470-3 wheel loader platforms. This condenser is the critical heat rejection component of the machine's HVAC (Heating, Ventilation, and Air Conditioning) system. It is responsible for dissipating the heat absorbed from the operator cabin into the ambient air, converting the high-pressure, high-temperature refrigerant gas discharged from the A/C compressor into a high-pressure, sub-cooled liquid that is then delivered to the evaporator unit inside the cab. A properly functioning condenser is essential for maintaining a comfortable and safe operating temperature for the machine operator, particularly in the extreme heat environments where Komatsu wheel loaders are routinely deployed—quarries, aggregate yards, steel mills, waste transfer stations, and desert construction sites.
The Komatsu Dash-3 series wheel loader family—encompassing the WA320-3, WA350-3A, WA380-3, WA400-3A, WA450-3, and WA470-3—represents a generation of machines renowned for their durability and productivity. These wheel loaders are powered by Komatsu's proprietary diesel engines and are equipped with closed-center load sensing hydraulic systems that generate substantial heat. The engine bay of a WA470-3 working at full load in a quarry on a 45°C summer day is an environment of extreme thermal stress. The A/C condenser, typically mounted at the front of the radiator and charge air cooler stack, is directly exposed to the full force of this heated ambient air drawn through the cooling package by the engine-driven suction fan. The condenser must operate in this hot, dusty, and high-vibration environment while maintaining sufficient heat rejection capacity to keep the operator cabin at a comfortable temperature. The OEM condenser, after years of service, succumbs to several predictable failure modes: fin corrosion and blockage from accumulated dust, dirt, and debris that reduces airflow and heat transfer; refrigerant leaks at the tube-to-header solder joints caused by thermal expansion and contraction fatigue combined with machine vibration; physical impact damage to the delicate aluminum fins and tubes from rocks, debris, or careless pressure washing; and internal contamination from desiccant breakdown or compressor debris that restricts refrigerant flow.
COGENG's 425-07-21530 aftermarket condenser is engineered to overcome these failure modes and provide reliable, long-lasting A/C performance. We utilize a parallel flow micro-channel aluminum construction, the modern industry standard for automotive and heavy equipment HVAC systems. This design consists of multi-port extruded aluminum flat tubes—each containing multiple microscopic refrigerant channels—brazed between louvered aluminum fins and framed by extruded aluminum headers and side supports. The parallel flow design offers several critical advantages over the older serpentine tube-and-fin design: significantly higher heat transfer efficiency due to greater refrigerant-side surface area; lower refrigerant pressure drop, which reduces compressor power consumption; superior structural rigidity and resistance to vibration-induced fatigue cracking; and a lighter weight for a given heat rejection capacity. The entire aluminum core is brazed in a controlled-atmosphere furnace, creating uniform, strong, and leak-free metallurgical bonds at every tube-to-fin, tube-to-header, and header-to-fitting joint. Each condenser undergoes a 100% helium mass spectrometer leak test to verify the integrity of every brazed joint and a visual inspection under magnification to confirm fin straightness, solder joint quality, and absence of manufacturing defects. The condenser is supplied with OEM-standard inlet and outlet connection fittings, pre-configured for direct, drop-in connection to the machine's existing refrigerant lines without the need for adapters, cutting, or brazing.
The 425-07-21530 A/C Condenser is validated for the following Komatsu Dash-3 series wheel loader models. Always provide your complete machine model and serial number for final compatibility verification.
| Brand | Model | Machine Class |
|---|---|---|
| Komatsu | WA320-3 | 8-Ton Class Wheel Loader |
| Komatsu | WA350-3A | 13-Ton Class Wheel Loader |
| Komatsu | WA380-3 | 16-Ton Class Wheel Loader |
| Komatsu | WA400-3A | 19-Ton Class Wheel Loader |
| Komatsu | WA450-3 | 23-Ton Class Wheel Loader |
| Komatsu | WA470-3 | 25-Ton Class Wheel Loader |
Complete A/C Condenser Assembly (1 unit): The fully brazed, pressure-tested aluminum condenser core, complete with integrated mounting brackets, side support channels, and OEM-standard refrigerant inlet and outlet connection fittings. Protective plastic caps are installed on the refrigerant ports to prevent contamination during shipping and handling.
Pre-Installed Receiver/Drier Cartridge or Desiccant Element: If the OEM design incorporates an integrated receiver/drier section, the COGENG condenser is supplied with a new desiccant element pre-installed and sealed. Replace the receiver/drier whenever the A/C system is opened to the atmosphere.
Protective Polyethylene Bag with Desiccant: The condenser is sealed in a heavy-gauge polyethylene bag containing a silica gel desiccant packet to prevent moisture absorption during transit and storage.
Heavy-Duty Export Carton with Protective Packaging: The bagged condenser is packed in a rigid, double-wall corrugated carton with molded paper corner protectors, high-density foam edge guards, and "Fragile — Handle with Care" and "Do Not Stack" handling labels.
Note: The following descriptions provide a detailed technical walkthrough of accompanying high-resolution product photographs.
Image 1: Complete Condenser Assembly — Front View
A high-resolution photograph of the complete 425-07-21530 condenser shown from the front, the air-entry face. The image displays the full core matrix of flat aluminum micro-channel tubes and precisely spaced louvered aluminum fins. The top and bottom extruded aluminum headers are visible, along with the side support channels and integrated mounting brackets. The inlet and outlet refrigerant connection ports, fitted with protective plastic shipping caps, are clearly shown on one header tank.
Image 2: Micro-Channel Tube and Fin Matrix — Macro Detail
A close-up macro photograph of the condenser core face. The image reveals the parallel flow architecture in sharp detail: the flat multi-port aluminum tubes with their internal microscopic refrigerant channels visible in cross-section, and the louvered aluminum fins that are precisely formed and brazed to the tubes. The louvers, or tiny slits cut into the fin surface, are visible—these disrupt the airflow boundary layer to increase heat transfer efficiency.
Image 3: Header Tank and Tube-to-Header Joints — Construction Quality
A macro image focusing on the junction between the flat tubes and the cylindrical extruded aluminum header tank. The photograph shows the uniform, fully penetrated brazed joints where each individual flat tube enters the header. The header tank's internal baffle plates, visible through the end cap, are positioned to create a multi-pass refrigerant flow path for optimized heat rejection.
Image 4: Refrigerant Connection Ports — Fitting Detail
A detailed image of the inlet and outlet refrigerant connection ports with the protective shipping caps removed. The photograph shows the OEM-standard male O-ring or flare fitting profiles, the clean machined sealing surfaces, and the surrounding braze joint that permanently and leak-tightly attaches the fitting to the header tank.
Image 5: Mounting Bracket and Side Support Detail
A photograph focusing on one of the integrated aluminum mounting brackets and the side support channel. The image shows the bracket's precise geometry with the bolt hole or slot, the robust brazed attachment to the side support, and the overall structural rigidity of the frame that resists vibration-induced fatigue cracking.
Dash-3 Series Wheel Loader Specificity: The 425-07-21530 condenser is specifically designed for the Komatsu Dash-3 series wheel loader platform, including the WA320-3, WA350-3A, WA380-3, WA400-3A, WA450-3, and WA470-3 models. It is not compatible with earlier Dash-2 series machines or later Dash-5, Dash-6, or Dash-8 series models without explicit physical and dimensional verification.
A-Series Suffix Significance: The "A" suffix on models such as WA350-3A and WA400-3A designates a specific production update within the Dash-3 series. The A/C condenser is common between the standard Dash-3 and the Dash-3A variants. The 425-07-21530 is the correct replacement for both.
Receiver/Drier Replacement is Mandatory: Whenever the A/C system is opened to the atmosphere for condenser replacement, the receiver/drier or accumulator must also be replaced. The desiccant element inside the receiver/drier absorbs moisture from the refrigerant. Exposure to atmospheric humidity during an open system repair will saturate the desiccant and render it ineffective. Failure to replace the receiver/drier will result in moisture circulating in the system, potentially forming ice crystals that block the expansion valve and corrosive acids that damage the compressor.
Professional A/C Service Required: Replacing an A/C condenser involves the regulated refrigerant R-134a. This work should be performed by a qualified HVAC technician with the proper equipment to recover the existing refrigerant from the system (venting refrigerant to the atmosphere is illegal in most jurisdictions), evacuate the system with a deep vacuum pump to remove all moisture and non-condensable gases after the new condenser is installed, and recharge the system with the correct weight of R-134a refrigerant and the correct quantity and viscosity of PAG (Polyalkylene Glycol) compressor oil as specified by Komatsu.
Physical Verification Recommended: Before ordering, if your machine has been in service for many years or has undergone previous repairs, we recommend physically measuring your existing condenser's core dimensions (height, width, thickness) and photographing the inlet and outlet connection fittings. This allows our technical team to provide a 100% confirmation of fitment before shipment.
Note: This is a summarized procedural guide. Always follow the Komatsu service manual for your specific model.
Step 1: Refrigerant Recovery and System Preparation
The A/C system must be serviced by a qualified technician. Connect an approved refrigerant recovery/recycling machine to the A/C system service ports. Recover all R-134a refrigerant from the system in accordance with local environmental regulations. Do not vent refrigerant to the atmosphere. Once the system pressure is equalized to zero, disconnect the recovery machine.
Step 2: Old Condenser Removal
Disconnect the refrigerant lines at the condenser inlet and outlet fittings. Immediately cap or plug the open line ends and the condenser ports to prevent moisture and dirt from entering the system. Disconnect any pressure switch or temperature sensor electrical connectors mounted on or near the condenser. Remove the mounting bolts securing the condenser to the radiator frame or cooling package structure. Carefully lift the old condenser out of the machine.
Step 3: New Receiver/Drier Installation
Locate and remove the old receiver/drier. Install the new receiver/drier. Keep the new receiver/drier sealed in its protective packaging until the moment of installation to minimize atmospheric moisture absorption by the desiccant. Install new O-rings on all refrigerant line fittings, lubricated with clean PAG oil.
Step 4: New Condenser Installation
Carefully position the new COGENG condenser into the mounting location. Install and hand-tighten all mounting bolts. Tighten mounting bolts to the OEM-specified torque. Remove the protective shipping caps from the condenser inlet and outlet ports. Connect the refrigerant lines to the condenser using new, lubricated O-rings. Tighten the fittings to the OEM-specified torque. Reconnect any pressure switch or temperature sensor electrical connectors.
Step 5: System Evacuation, Charging, and Performance Test
Connect a deep vacuum pump to the A/C system service ports. Evacuate the system to a deep vacuum (typically below 500 microns) for a minimum of 30-60 minutes. This step is critical to remove all moisture and non-condensable gases that will impair system performance and potentially damage the compressor. Close the vacuum pump valves and observe the vacuum gauge. The system must hold a stable deep vacuum with no rise, indicating no leaks. Recharge the system with the exact weight of R-134a refrigerant specified by Komatsu for your machine model. Add the correct quantity and viscosity of PAG compressor oil if any oil was lost during the repair. Start the engine and operate the A/C system at maximum cooling. Measure the air temperature at the center cab vent. Verify that the system is delivering the specified temperature drop and that the high-side and low-side pressures are within the normal operating range.
| Detail | Description |
|---|---|
| Shipping Methods | By Air: Cost-effective for urgent single-unit orders to international airports. By Sea: Most economical for bulk distributor orders and containerized freight. By Express (FedEx, UPS, DHL, TNT): Fastest door-to-door service for machine-down emergencies (4-7 business days). Method optimized per destination and urgency. |
| Estimated Delivery Time | Express Courier: 4-7 business days. Air Freight: 8-15 days. Sea Freight: 30-45 days. Transit times are carrier-dependent. The arrival date on the official tracking portal is the authoritative reference. Tracking provided within one business day of dispatch. |
| Packing | The condenser is sealed in a protective polyethylene bag with desiccant. It is packed flat in a rigid, heavy-duty, double-wall corrugated carton with molded paper corner protectors, high-density foam edge guards, and prominent "Fragile — Handle with Care," "This Side Up," and "Do Not Stack" handling labels. |
| Payment Terms | Western Union, L/C (Letter of Credit), T/T (Telegraphic Transfer), MoneyGram, D/A (Documents against Acceptance), D/P (Documents against Payment). Standard terms: 30% T/T deposit, 70% balance before shipment. |
| Minimum Order Quantity | Acceptable Trial Order — Single unit orders welcomed and encouraged for first-time customers to verify quality and fit. |
| Policy Point | Terms |
|---|---|
| Merchant Return Policy | All sales are final. No returns or exchanges. An A/C condenser is a sealed, pressure-tested component. Once departed from our controlled environment, we cannot verify it has not been installed, subjected to refrigerant pressure, had its connection fittings contaminated, or sustained physical damage to the delicate aluminum fins and tubes. This policy ensures every customer receives a brand-new, factory-tested component. |
| DOA Quality Guarantee | Full replacement for manufacturing defects reported within 7 calendar days of delivery. The condenser must be in its original, uninstalled condition with protective caps on the refrigerant ports. Physical damage such as bent fins, crushed tubes, damaged fittings, or evidence of installation voids the guarantee. Shipping damage claims must be filed immediately with photographic evidence of the damaged packaging. |
| Pre-Shipment Confirmation | We send high-resolution photos of your exact condenser showing the core, connection fittings, and mounting brackets for your written approval before dispatch. No shipment without your confirmation. |
Q1: What are the symptoms of a failed or clogged A/C condenser?
A: Common symptoms include: A/C system blowing warm or only slightly cool air despite the compressor engaging; high high-side pressure and low low-side pressure readings on A/C manifold gauges indicating a restriction; visible damage to the condenser fins, such as bent-over fins, crushed tubes, or oily stains indicating a refrigerant leak; the condenser fins clogged with dirt, dust, or debris that cannot be cleaned effectively; and the A/C system frequently cycling on and off due to high-pressure cutout switch activation.
Q2: Why must the receiver/drier be replaced at the same time as the condenser?
A: The receiver/drier contains a desiccant material that absorbs and permanently traps moisture from the A/C system. When the system is opened to the atmosphere for condenser replacement, the desiccant is exposed to ambient humidity and quickly becomes saturated. A saturated desiccant cannot absorb additional moisture, allowing water to circulate freely in the system, where it can freeze at the expansion valve and form corrosive acids that destroy the compressor. Replacing the receiver/drier is a mandatory part of any open A/C system repair.
Q3: Is this condenser compatible with R-134a refrigerant?
A: Yes. The COGENG 425-07-21530 condenser is designed and manufactured for use with R-134a (HFC-134a) refrigerant, which is the standard refrigerant specified for the Komatsu Dash-3 series wheel loader A/C systems.
Q4: Can I clean my old condenser instead of replacing it?
A: A severely clogged or leaking condenser should be replaced. While surface dirt can sometimes be cleaned from the fin face with compressed air blown from the engine side outward or with a gentle water spray, internal contamination, corrosion-blocked micro-channel tubes, or refrigerant leaks at the braze joints cannot be repaired effectively. If your condenser is leaking refrigerant (visible as oily residue) or has significant fin corrosion, replacement is the correct and permanent solution.
Q5: What precautions are taken to prevent shipping damage?
A: A/C condensers are fragile components with delicate aluminum fins that can be easily bent or crushed. COGENG packs each condenser flat in a rigid, heavy-duty corrugated carton with molded paper corner protectors and high-density foam edge guards that absorb impact and prevent the condenser from shifting during transit. The carton is prominently labeled with "Fragile," "This Side Up," and "Do Not Stack" instructions. Despite these precautions, we recommend inspecting the package immediately upon delivery and photographing any external carton damage before opening, so a shipping damage claim can be filed promptly if necessary.
For pricing, machine-down emergency support, trial order arrangements, bulk quantity discounts, or pre-purchase compatibility verification, contact your COGENG supplier today.
Sales Price: Contact COGENG sales customer service directly for the most current competitive pricing. Trial orders are welcome. Request a personalized quotation.
Shipping Method & Cost: We will provide a tailored shipping quotation—by air, by sea, or by express courier—based on your location, urgency, and budget. DDP terms available for select countries.
Estimated Delivery Time: Based on the selected carrier. Tracking provided within one business day of dispatch.
✅ Direct OEM Replacement — Precision-Manufactured for Guaranteed Drop-In Fit, No Modifications Required.
✅ Komatsu Dash-3 Series — Validated for WA320-3, WA350-3A, WA380-3, WA400-3A, WA450-3, WA470-3.
✅ Parallel Flow Micro-Channel Technology — Superior Heat Rejection, Lower Refrigerant Pressure Drop, Vibration-Resistant Brazed Construction.
✅ ISO 9001 Certified Manufacturing — 100% Helium Leak Tested, High-Pressure Burst Tested, R-134a Compatible.
✅ Trial Orders Welcome — Single Unit Orders Accepted for First-Time Customer Evaluation.
✅ In Stock & Ready to Ship — Keep Your Operators Cool and Productive with Immediate Worldwide Dispatch.
Critical Action Required: To ensure 100% compatibility, please provide your Komatsu wheel loader's complete model designation and serial number. Our technical team will verify the correct condenser configuration for your specific machine and provide written confirmation before your order is processed.
Merchant Return Policy: All products shipped are not returnable or exchangeable. Please complete all compatibility checks before purchase
*shipping Details Return Sales*
Sales price:
Please contact COGENG sales customer service for specific prices.
Shipping method:
The specific arrangement will be based on the cargo situation.
Estimated delivery time:
It is based on the shipping time of the logistics company, and the arrival time shown shall prevail.
Contact details are at the bottom.
MerchantReturnPolicy:
The products shipped are not returnable or exchangeable.
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