Genuine Quality Part Number 723-40-71102 & 723-40-71800 Pressure Relief Valve
Expertly engineered for Komatsu heavy machinery, our self-reducing valves and float switches provide the ultimate solution for hydraulic pressure instability and fuel level detection failures. As a leading supplier, Honour Time Machinery Limited delivers high-quality domestic alternatives that match original equipment manufacturer (OEM) standards, resolving common system errors in PC200, PC300, and PC400 series.
Chat on WhatsApp: +8613532379052 Email Us: [email protected]Direct Export & Custom Development for Engine Liners
We provide OEM-grade manufacturing for various excavator brands. Custom-made engine cylinder liners available for:
Cummins QSB6.7 Cylinder Liner Factory Direct
Komatsu 6D102 Performance Engine Liner
Caterpillar C7 Heavy Duty Liner Kit
Isuzu 4HK1 High-Precision Engine Cylinder Sleeve
Support for custom drawings and specific material requirements. Global export with competitive wholesale pricing.
Optimized for Heavy Duty: Specifically designed for 723-40-71102 (7234071102) applications in construction environments.
High-Precision Sensing: The 7861-92-4800 (7861924800) float switch ensures accurate fluid monitoring to prevent engine damage.
Durability Guaranteed: Manufactured with wear-resistant alloys to resolve pressure drops and hydraulic leaks.
Plug-and-Play Installation: 100% compatible with Komatsu PC series machinery for zero-modification fitting.
Cost-Effective Excellence: Premium Chinese alternative that offers 99% OEM performance at a fraction of the cost.
| Specification Item | Detail Information |
|---|---|
| Model NO. | 723-40-71102, 7234071102, 723-40-71800, 7234071800, 7861-92-4800, 7861924800 |
| Application | Excavator / Construction Machinery Hydraulic & Electrical Systems |
| Brand Compatibility | Komatsu, PC200, PC300, PC400 |
| Certification | ISO9001 / CE Certified |
| Condition | 100% Brand New High-Quality Replacement |
| Transport Package | Standard Export Neutral Carton or Customized Branding |
| Production Capacity | 5000 PCS / Year |
| Origin | Guangzhou, China (Honour Time Machinery) |
| Payment Terms | T/T, Western Union, MoneyGram |
| Delivery | DHL, Fedex, EMS, UPS, Air, or Sea Freight |
We are your one-stop source for premium engine assemblies and components. Our core inventory includes Cummins Engine Gasket Kits, Komatsu Piston Rings, Caterpillar Turbochargers, Isuzu Injectors, Kubota Water Pumps, and Yanmar Fuel Pumps.
| Brand | Compatible Models |
|---|---|
| Komatsu | 3D82, 3D84, 4D105, 6D95, 6D108, 6D110, 4D84, 4D95, 6D102, 6D105, 6D114, 6D170 |
| Caterpillar | 3114, 3116, C4, C6, 3064T, S6K, C7, C-9, C13 |
| Isuzu | 3LD1, 4LE1, 4BG1, 4HK1, 6SD1, 6WG1, 4LE2, 4JB1, 6BG1, 6HK1, 6WF1 |
| Mitsubishi | 4D34, 4D24, K4M, S3Q2, 6D16, 6D24, S4KT, 6D40 |
| Yanmar | 4D88E, 4TNE84, 4TNV88, 4TNV94L, 4TNE88, 4TNE94, 4TNV98, 4TNV106 |
Main product focus: Cylinder Liners, Pistons, Piston Rings, Crankshaft Bearings, Connecting Rods, Overhaul Gasket Kits, Diesel Injection Pumps, Crankshafts, Turbochargers, Water Pumps, Oil Pumps, Cylinder Blocks, and Cylinder Heads.
Cummins QSB6.7 Turbocharger: Boosts air intake; located on the exhaust manifold of excavators like CASE CX210.
Komatsu PC200-8 Main Valve: Controls hydraulic flow; essential for boom and bucket movement.
Caterpillar 320D Injector: Delivers high-pressure fuel into the C7 engine cylinder.
Isuzu 4HK1 Crankshaft: Converts linear piston motion into rotation for SANY excavators.
Kubota V2403 Water Pump: Circulates coolant in mini-excavators like Bobcat E35.
Yanmar 4TNV98 Piston: Main moving component in the combustion chamber of Takeuchi loaders.
Weichai WD10 Oil Pump: Ensures lubrication for heavy-duty truck engines.
Komatsu 7861-92-4800 Float Switch: Monitors coolant/fuel levels inside PC300-7 tanks.
Caterpillar C9 Cylinder Head: Seals the top of the engine block, housing valves and injectors.
Isuzu 6HK1 Gasket Head: Prevents combustion gas leakage between the block and head.
Symptoms: Slow movement, inability to lift heavy loads, and unusual noise from the pump area.
Solution: Often caused by a faulty Self-Reducing Valve (723-40-71102). Check the pilot pressure. If pressure is below 3.2MPa, the valve spring may be fatigued or the orifice blocked. Replacing with a new 7234071102 valve typically restores full hydraulic power immediately.
Maintenance Tip: Change hydraulic oil filters every 500 hours and always use high-quality replacement parts to prevent premature wear of the main pump.
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