Worldwide Shipping 
3447391 CAT Sensor Gp-Pressur
4.7
(Site rating)Description for 3447391 Pressure Sensor
▶Specification for 3447391 Pressure Sensor
▶Exact Fit Guarantee for 3447391 Pressure Sensor
▶| Models | 120M 2, 12M 2, 12M 3, 12M 3 AWD, 140M 2, 140M 3, 140M 3 AWD, 160M 2, 160M 3, 160M 3 AWD, 236D, 242D, 246D, 257D, 259D, 262D, 272D, 272D XHP, 277D, 279D, 287D, 289D, 299D, 299D XHP, 303.5E, 304E, 305.5 |
|---|---|
| Dimensions | 2.76x2.36x1.97 |
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A Delay Handled the Right Way
Honestly, if I were in Miami like my shipment was, I wouldn?t have been in a hurry to ship out either. I was frustrated at first ? delays cost me time on the job ? but Propel Parts stepped up.
Deb, Daniel and the team owned the mistake, kept the communication clear, and graciously refunded my shipping costs without making it a hassle. That kind of accountability is rare these days, and I genuinely appreciated how they handled it.
Things don?t always go perfectly, but these folks proved they?re more interested in doing right by their customers than just pushing parts out the door. Solid company, solid people.
? Jimmy Spong
Hartco Mobile Welding
P.S. Incredible quality on the pin as well. I had to do some custom modifying, and let?s just say the case hardening was ? well ? hard. Great Stuff! Thank you. -
Awesome and diligent support. Would definitely recommend
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Received 15 items within 5 days from placing order !
Great. ! -
Very knowledgeable and quick to quote parts.
Very quick to respond to parts quotes. Knowledgeable and Polite, and very quick shipping. Definitely will purchase parts from these guys in the future. -
Propel parts is a good Cat vendor that provides a top notch service to customers from ordering to delivery. Their after sales service is really impressive.
Frequently Asked Questions
What is the function of the 3447391 pressure sensor group?
The 3447391 pressure sensor group monitors fuel or system pressure and sends that information to the machine’s control system. Accurate pressure data helps the engine or hydraulic controller adjust performance, maintain efficiency, and protect components from pressure-related damage.
How do I install the 3447391 pressure sensor group?
Here’s a general guide for proper installation:
- Turn off the engine and disconnect the power source before beginning work.
- Relieve any system pressure as recommended in your service manual.
- Locate the old pressure sensor on the fuel rail or pressure port and disconnect the electrical connector.
- Unscrew the old sensor carefully.
- Apply thread sealant if required and install the new 3447391 sensor, tightening it to the torque specified in your manual.
- Reconnect the electrical connector, restore power, and start the system to check for proper readings and sealing.
Which machines or systems use the 3447391 pressure sensor group?
The 3447391 pressure sensor group is used in the fuel or pressure monitoring systems of many Caterpillar machines such as motor graders, dozers, loaders, and articulated trucks where this part number is specified. Compatibility varies by model and engine configuration, so always verify fitment using your equipment’s service documentation before ordering. If you are still unsure, reach out to Propel Parts, our team will be happy to help you verify if this part fits your equipment.
Does the 3447391 pressure sensor group meet performance expectations?
Yes, the 3447391 pressure sensor group is engineered to meet or exceed OEM or specifications for accuracy and durability. When replacing pressure sensors, choose genuine or high-quality aftermarket parts that meet or exceed OEM expectations to help ensure consistent readings and long service life.
Does the 3447391 pressure sensor group meet performance expectations?
Yes, the 3447391 pressure sensor group is engineered to meet or exceed OEM or specifications for accuracy and durability. When replacing pressure sensors, choose genuine or high-quality aftermarket parts that meet or exceed OEM expectations to help ensure consistent readings and long service life.
How often should a pressure sensor like the 3447391 be inspected or replaced?
Pressure sensors should be checked during routine electrical system maintenance or anytime you experience performance issues related to fuel delivery or pressure regulation. Inspect for signs of electrical corrosion, cracks, or erratic readings. Replace the sensor if it fails to provide stable, accurate feedback.
What are common signs that the 3447391 pressure sensor group needs replacement?
Typical indicators include:
- Erratic pressure readings or fluctuating gauge behavior
- Reduced engine performance or power
- Warning lights or fault codes related to pressure monitoring
- Difficulty starting or irregular acceleration
Why is using a quality pressure sensor group important for equipment performance?
A quality pressure sensor group ensures accurate monitoring of system pressure, which supports efficient engine control, fuel delivery, and overall machine performance. Using genuine or high-quality aftermarket parts that meet or exceed OEM expectations helps improve reliability, reduce risk of incorrect pressure data, and contribute to long-term equipment durability.
This 3447391 Pressure Sensor is compatible with the following models:
120M 2, 12M 2, 12M 3, 12M 3 AWD, 140M 2, 140M 3, 140M 3 AWD, 160M 2, 160M 3, 160M 3 AWD, 236D, 242D, 246D, 257D, 259D, 262D, 272D, 272D XHP, 277D, 279D, 287D, 289D, 299D, 299D XHP, 303.5E, 304E, 305.5 & more...
Shipping
We know equipment downtime costs money, so fast and reliable shipping is a priority at Propel Parts. Orders placed on weekdays before 3:00 PM ET typically ship the same day, with expedited delivery options available for many locations when time is critical.
We ship across the U.S., Canada, and over 130 countries worldwide, helping customers keep machines running wherever they operate. Available shipping methods and delivery estimates are shown at checkout so you can select the option that best fits your timeline.
Tracking information is emailed within 24–48 hours after your order is processed, giving you full visibility from dispatch to delivery and peace of mind that your parts are on the way.
Easy Returns
Our refund policy is simple. We offer a 30-day, no-hassle return policy, and we make every effort to provide the best service and highest-quality parts possible. If you’re not fully satisfied with your purchase, you may return it within 30 days for a refund. Full details are available on our Returns Policy page.
Warranty
Buy with confidence. All parts from Propel Parts are covered against material or manufacturer defects for 12 months from the original invoice date. We stand behind every part we sell, so you can count on reliable performance and dependable support. Full details are available on our Warranty Policy page.
1 YEAR UNLIMITED WARRANTY
ORDER BY 3PM EST. EXCL. WEEKEND
NO CORE OR EXCHANGE CHARGES
EASY RETURNS & FAST REFUNDS
