3447391 CAT Sensor Gp-Pressur

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.

Here’s a general guide for proper installation:

1. Turn off the engine and disconnect the power source before beginning work.
2. Relieve any system pressure as recommended in your service manual.
3. Locate the old pressure sensor on the fuel rail or pressure port and disconnect the electrical connector.
4. Unscrew the old sensor carefully.
5. Apply thread sealant if required and install the new 3447391 sensor, tightening it to the torque specified in your manual.
6. Reconnect the electrical connector, restore power, and start the system to check for proper readings and sealing.

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.

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.

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.

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.

Typical indicators include:

1. Erratic pressure readings or fluctuating gauge behavior
2. Reduced engine performance or power
3. Warning lights or fault codes related to pressure monitoring
4. Difficulty starting or irregular acceleration

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.