Description
Product Video
1. Key Features & Benefits
OEM cross references T406711 / 320-3060 / 3203060 – Direct replacement engine oil pressure sensor for Perkins C7.1 and Caterpillar C7.1 engines, used in CAT 336 excavators.
Critical engine lubrication monitor – Installed in the engine oil system, this sensor continuously measures oil pressure and sends the data to the ECM, which uses it for low oil pressure warnings, engine derates, and logged events.
Precision measurement – Measures oil pressure up to 1200 kPa (174 psi), providing vital data for real‑time engine performance monitoring.
Plug‑and‑play installation – 3‑pin connector, supplied with a new sealing O‑ring, manufactured to OEM specifications. Torque to 10 ± 2 N·m (89 ± 18 lb in).
Rugged corrosion‑resistant construction – Brass threads and rubberized body provide long life in harsh environments, outperforming plastic‑only designs.
CE‑certified accuracy – Delivers precise pressure readings to help maintain optimal engine lubrication and avoid unnecessary derates.
Wide compatibility – Originally designed for Perkins 1200 Series and Caterpillar C4.4 / C7.1 engines, also fits CAT 336 excavators and many other C7.1‑powered machines.
Fast delivery – 6–8 working days lead time from our Guangzhou warehouse.
2. Technical Specifications
| Specification | Details |
|---|---|
| Product Name | Engine Oil Pressure Sensor (Low Pressure Sensor) |
| Part Numbers (Interchangeable) | T406711 / 320-3060 / 3203060 |
| Engine Application | Caterpillar C7.1 / Perkins 1200 Series (C4.4 also compatible) |
| Compatible Machine | CAT 336, 336D2, 336GC, plus other C7.1‑powered excavators |
| Sensing Technology | Piezoresistive pressure sensor (resistance changes under oil pressure) |
| Measurement Range | Up to 1200 kPa (174 psi) |
| Operating Voltage | 5.00 ± 0.25 VDC (regulated by ECM) |
| Output Signal | Analog voltage proportional to oil pressure |
| Connector Type | 3‑pin (VCC, Ground, Signal) |
| Thread Size | Metric (12mm diameter) |
| Sealing | Supplied with new O‑ring (pre‑installed or separate) |
| Housing Material | Brass threads + rubberized / plastic body for environmental resilience |
| Certifications | CE certified (EU safety & quality standards) |
| Origin | China |
| MOQ | 1 piece |
| Price | Negotiable |
| Packaging | Protective paper box |
| 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
Mining & quarrying – Remote job sites demand reliable oil pressure monitoring. A failed sensor will trigger unexpected derates or shutdowns. Keep a spare sensor on hand to restore full engine performance within minutes.
Heavy construction & earthmoving – CAT 336 excavators work long hours under high load. The oil pressure sensor is the only feedback the ECM receives on lubrication health. A drifting sensor may hide developing oil pump or bearing wear.
Equipment rental fleets – Renters rarely understand warning lights and may ignore them. A failed sensor that doesn’t trigger a warning could lead to serious engine damage during a rental. Proactive replacement is cheap insurance.
Aftermarket engine rebuilds – When overhauling a C7.1 engine, always install a new oil pressure sensor. Reusing an old sensor risks false readings that can mask lubrication problems in the newly rebuilt engine.
Marine & industrial power – Perkins C7.1 engines are also used in marine gensets and industrial pumps. The T406711 sensor is the same. Oil pressure monitoring is critical for continuous‑duty applications where an unnoticed pressure drop can rapidly destroy bearings.
4. Why Choose Hongtengda Parts?
Over 25 years of experience – Founded in 2001, we specialize in engine management sensors for Caterpillar, Perkins, Komatsu, Hitachi, Kobelco, SANY, XCMG, Liugong and more.
90% stock availability – CAT T406711 oil pressure sensors are ready for immediate dispatch from our Guangzhou warehouse. No waiting for backorders.
24‑hour shipment – From our Guangzhou hub 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. Fumigation‑free wooden cases available for combined orders.
Pre‑shipment verification – We inspect every sensor for thread damage, O‑ring condition, and connector pin integrity before shipping. Photos available upon request.
One‑stop sourcing – We also supply rail pressure sensors, coolant temperature sensors, oil level sensors, SCV valves, injectors, and full engine rebuild kits for the C7.1 platform.
Technical support – Send us your machine serial number, diagnostic codes, or photos of the failed component. Our in‑house workshop team confirms compatibility within 2 hours and provides installation guidance.
Send us your CAT336 machine serial number or a photo of your old oil pressure sensor – we will verify fitment and provide a quote within 24 hours.
Warranty note: 6‑month warranty against manufacturing defects (electrical drift, housing leakage, material failure). Does not cover damage from improper installation, physical impact, or contamination.
The oil pressure sensor is small, inexpensive, and often overlooked – but it is the only thing that warns the ECM when your engine is running dry. Keep a spare on the shelf, and turn a sudden derate into a routine replacement.
