Description
Product Video
1. Key Features & Benefits
OEM cross references 585-8758 & 142922743 – Direct replacement common rail pressure sensor for Caterpillar C7.1 (Perkins) engines, used in CAT336 and other C7.1-powered excavators.
Critical fuel system component – Installed on the common rail, this sensor measures instantaneous fuel pressure inside the rail and sends a voltage signal to the ECM. The ECM uses this data to precisely control fuel injection quantity, injection timing, and rail pressure regulation for optimal combustion.
Restores engine power and efficiency – A failing rail pressure sensor causes low power, rough idling, black smoke, poor fuel economy, or engine derate. Replacing it restores proper fuel delivery and combustion.
High-precision sensing element – Built with robust piezoresistive micro strain gauge technology, delivering accurate pressure readings across the entire operating range.
Plug-and-play installation – 3-pin connector with 18mm thread diameter, manufactured to OEM specifications for direct bolt-on replacement. No programming or calibration required – the ECM automatically reads the sensor’s signal.
High-pressure rating – Designed to withstand common rail pressures up to 1,600–1,800 bar (23,200–26,000 psi), matching genuine OE specifications.
Comprehensive compatibility – Fits CAT336, 336D2, 336GC, 330D, 340D2, 349D2, as well as many other C7.1-powered excavators, wheel loaders, backhoes and telehandlers.
Fast delivery – 6–8 working days lead time from our Guangzhou warehouse, shipped in protective packaging.
2. Technical Specifications
| Specification | Details |
|---|---|
| Product Name | Common Rail Pressure Sensor (Rail Pressure Sensor / RPS) |
| Part Numbers (Interchangeable) | 585-8758 (CAT) / 142922743 |
| Engine Application | Caterpillar C7.1 / Perkins 1204J Series (Common Rail) |
| Compatible Machine | CAT336, CAT336D2, CAT336GC, CAT330D, CAT340D2, CAT349D2, and other C7.1-powered excavators |
| Sensing Technology | Piezoresistive micro strain gauge |
| Thread Size | M18 x 1.5 |
| Connector Type | 3-pin (Vcc, Ground, Signal) |
| Output Signal Range (Typical) | 0.5V at 0 bar – 4.5V at maximum rail pressure |
| Maximum Rail Pressure Rating | 1,600–1,800 bar / 23,200–26,000 psi |
| Signal Failure Threshold | Voltage >4.7V for 0.6 seconds triggers DTC |
| Material | High-grade steel with corrosion-resistant coating |
| Origin | China |
| MOQ | 1 piece |
| Price | Negotiable |
| Packaging | Paper box with protective bubble wrap |
| Delivery Time | 6–8 working days |
| Payment Terms | T/T, XTransfer, PayPal, Western Union |
| Supply Capacity | 500 pieces/month |
| Shipping | Sea freight / Air freight / Express (DHL, FedEx, UPS) |
3. Applications
Mechanical repair shops – The most common sensor replacement on high-hour C7.1 engines. Keeping one in stock allows same-day turnaround for customers experiencing power loss or derate issues.
Mining & quarrying – Continuous high-load operation accelerates sensor wear; proactive replacement prevents unexpected engine derate and costly downtime in remote mine sites where service support is limited.
Heavy construction & earthmoving – CAT336 excavators working on highway projects, dam construction, and large-scale earthmoving need consistent engine power. A failing rail pressure sensor causes intermittent power loss that can halt production.
Equipment rental fleet maintenance – Renters expect reliable performance. Proactive sensor replacement based on hour intervals reduces breakdowns and protects your fleet’s reputation.
Energy projects – C7.1 engines are also used in generators and pumps. Rail pressure sensor failure on a generator set can cause complete shutdown or unstable power output.
4. Why Choose Hongtengda Parts?
Over 25 years of experience – Founded in 2001, specializing in excavator engine parts for Caterpillar, Hitachi, Komatsu, Kobelco, SANY, XCMG, Liugong and 15+ brands.
90% stock availability – CAT C7.1 common rail pressure sensors are ready for immediate dispatch from our Guangzhou warehouse – not sitting in a supplier’s backlog.
24‑hour shipment – From our Guangzhou hub (Zhucun, Asia’s major parts distribution center) to your forwarder in 1 day; international orders shipped within 24 hours.
Professional export packaging – Protective paper boxes with bubble wrap, suitable for FCL or LCL sea/air freight.
One‑stop sourcing – We supply not only rail pressure sensors but also SCV valves, injectors, turbochargers, engine rebuild kits, hydraulic pumps, and undercarriage parts.
Technical support – Send us your machine serial number, a photo of the old part, or diagnostic codes – our specialists cross-reference and confirm fitment within 2 hours.
After-sales service – If you encounter issues after installation, our technicians review your photos and videos to help diagnose – quality issues are covered.
Send us your CAT336 machine serial number or a photo of the old rail pressure sensor – we will verify compatibility and provide a quote within 24hours.
