Ensure your heavy equipment stays cool under pressure with the premium Komatsu 207-03-75311 (also searched as 2070375311) and 207-03-72770 (2070372770) lower hose. When your cooling system fails, every minute of downtime costs money. Our OEM-standard replacement hoses are engineered specifically for demanding Komatsu machine applications, offering the perfect balance between durability and cost-effectiveness.
Whether you are performing a routine overhaul or urgent repairs, having the correct part number is crucial. We specialize in supplying direct-fit components that match original factory specifications to prevent leaks and engine overheating.
| Attribute | Details |
|---|---|
| Model NO. | Komatsu PC Series Excavators / Heavy Machinery |
| Product Name | Lower Radiator Hose / Cooling Pipe |
| Part Number 1 | 207-03-75311 (2070375311) |
| Part Number 2 | 207-03-72770 (2070372770) |
| Condition | Brand New, OEM Standard Replacement |
| Material | High-Temp EPDM Rubber with Reinforced Layer |
| Application | Engine rebuild, overhaul, maintenance |
| Stock Status | In Stock / Fast Dispatch |
| MOQ | 1 Piece |
| Payment Terms | T/T, Western Union, MoneyGram |
| Delivery Methods | Express: DHL Fedex EMS UPS or by Air / Sea |
Not all aftermarket hoses are created equal. Below is a comparison of our premium replacement vs. generic market alternatives.
| Core Buying Points | Our Premium Replacement | Generic Secondary Market Parts |
|---|---|---|
| Heat Resistance | Up to 150 Degrees Celsius | Fails at 100 Degrees Celsius |
| Pressure Tolerance | Reinforced for high-pressure cycles | Prone to expansion and bursting |
| Fitting Precision | 1:1 Precise OEM dimensions | Approximate sizing leading to leaks |
| Chemical Resistance | Resistant to coolant additives/oils | Quickly degrades and softens |
| Service Life | Long-term durability (2-3 years+) | Short lifespan (less than 1 year) |
| Certification | ISO / OEM Standard Compliant | No quality tracking |
Q: Why is my machine losing coolant near the radiator?
A: Most leaks in this area are caused by a cracked or hardened 207-03-75311 hose. Over time, the rubber loses flexibility due to heat cycles. Replacing it with a new 207-03-72770 lower hose ensures a tight seal and proper flow.
Q: How can I tell if the lower hose needs replacement during an engine overhaul?
A: Check for soft spots, bulging, or visible cracks. If you are using Komatsu or Cummins engine kits for a rebuild, the cooling hoses should be replaced as a preventive measure to avoid damaging new engine components.
Q: Why Choose This Product?
A: Our hoses feature an OEM-standard tri-metal structure or high-grade reinforced EPDM. We are trusted by repair shops and equipment fleets globally for providing parts that withstand extreme job site conditions.
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