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CAT 1P4231 Internal Gear Pump

Key Performance Parameters – Gear Pump 1P4231

Type: Fixed displacement external gear pump
Application: Transmission / lubrication pump
Max working pressure: 210 bar
Peak pressure: 230 bar
Rotation: Clockwise (shaft end view)
Mount: 4-bolt rectangular flange
Fluid: Hydraulic / transmission oil
Temp range: -15°C ~ +80°C
Viscosity: 25–100 cSt
High volumetric efficiency, heavy-duty design
  • CAT 1P4231

  • Green Hydraulic

  • 1

Availability:
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Product Description

CAT 1P4231 Internal Gear Pump Overview

CAT 1P4231 Internal Gear Pump is a heavy-duty transmission / oil gear pump designed for reliable fluid transfer and hydraulic power delivery in Caterpillar equipment. It features a compact, robust gear pump structure with high volumetric efficiency, smooth flow output, and durable performance under demanding operating conditions. Commonly used in CAT 814, 815, 816, 966, and 966C machines powered by 3306 engines, this pump is valued for its long service life, stable pressure performance, and OEM-level interchangeability.

Features and Benefits

  • High volumetric efficiency for stable oil flow

  • Durable construction for long service life

  • Smooth and low-noise operation

  • Compact design for easy installation

  • Reliable performance under heavy-duty conditions

  • OEM interchangeable replacement for CAT equipment


Technical Data

Parameter Specification
Part Number 1P4231 / 1P-4231
Pump Type Internal Gear Pump
Rotation Standard OEM Rotation
Application Transmission / Oil Pump
Compatible Machines CAT 814, 815, 816, 966, 966C
Compatible Engine CAT 3306
Weight Approx. 9.98 kg (22 lbs) 
Mounting Type SAE Standard Flange Mount
Material High-Strength Cast Iron / Steel
Performance High efficiency, stable pressure output


Applications

  • Wheel loaders

  • Bulldozers

  • Construction machinery

  • Transmission systems

  • Heavy-duty hydraulic equipment

Vane Pump Application



Packaging & Delivery

1P4231 pumps are typically packaged securely to prevent damage during transit. The packaging includes:

Protective Wrapping: To safeguard the pump from environmental damage.

Custom Crates: For larger, heavier pumps, ensuring safe handling.

Documentation: Includes installation, maintenance instructions, and warranty details.

Delivery time depends on the model, customizations, and location but typically ranges from 2 to 6 weeks from the order date.


1P4231 Hydraulic Gear Pump FAQ


1. What is the CAT 1P4231 hydraulic gear pump used for?
It is commonly used in transmission lubrication and hydraulic oil circulation systems for heavy-duty Caterpillar equipment.

2. Which machines is 1P4231 compatible with?
It fits CAT 814, 815, 816, 966 and 966C machines, typically powered by 3306 engines.

3. Is 1P4231 an internal gear pump?
Yes, it is designed as an internal gear pump for stable flow and reliable pressure performance.

4. Can 1P4231 replace the original CAT pump directly?
Yes, it is designed as a direct OEM replacement with interchangeable mounting dimensions.

5. What are the advantages of the 1P4231 pump?
It offers high efficiency, durable construction, smooth operation, and long service life.

6. What industries use the 1P4231 hydraulic pump?
It is widely used in construction, mining, earthmoving, and heavy equipment applications.

7. What is the rotation direction of the 1P4231 pump?
It normally uses standard OEM rotation (clockwise), depending on application requirements.

8. Is aftermarket replacement available for 1P4231?
Yes, aftermarket and OEM replacement versions are widely available with one-year warranty options from multiple suppliers. 

Certifications & Quality Assurance

1P4231 pumps are manufactured in compliance with international standards, ensuring high performance and reliability:

ISO 9001: Certified for quality management systems.

CE Certification: Ensures compliance with European safety, health, and environmental protection standards.

RoHS Compliance: Ensures the pump does not contain hazardous materials.

Factory Testing: Every pump is rigorously tested for performance, pressure, and leak integrity before shipping.



Green Hydraulic Patent Certificate

FAQ

1.How does the variable displacement work?

The pump's flow is adjusted by changing the angle of an internal swash plate. As the swash plate angle changes, the stroke length of the pistons varies, which in turn changes the volume of fluid displaced per rotation, allowing the flow rate to adapt to the system's needs.


2.What's our advantages?

Factory established in 2005;

With a great deal of production experience;

80+ employees become the professional team;

Constant updated ERP system ensure efficiency of work;

Sophisticated equipment ehanced the accuracy of products;

Professional salesmen provide the greast service;

With a large number of famous customers all over the world;

Great after-sales service;

With the long term cooperation with famous logistics and express company in China,provide the better goods service.


3.What is your payment terms?

Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.


4.Can you make my own brand on the products?

Of course we can. Just send me your logo  we can make it for you.


5.What is our main export market?

America(40.5%):USA, Canada, Argentina, Brazil

Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.

Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.

Others(5.8%).


Unedited footage of the Green Hydraulic Factory

The Green hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components. These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications, from heavy equipment and machinery to automotive and industrial systems.

Unedited footage of the Green Hydraulic Factory

The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.

Unedited footage of the Green Hydraulic Factory

Green Hydraulic's manufacturing facilities for hydraulic pumps maintain stringent quality standards, often adhering to international certifications, to meet the expectations of customers in industries such as construction, agriculture, automotive, and manufacturing.

Unedited footage of the Green Hydraulic Factory3

All hydraulic pumps produced by Green Hydraulic have undergone compliance testing, ensuring their quality and reliability.

Unedited footage of the Green Hydraulic Factory4

To meet the diverse needs of different industries, the green hydraulic offer customization options, such as specialized seals, materials, and pump configurations. These facilities often work closely with engineering teams to develop tailored solutions for specific applications, from high-pressure systems to low-flow, high-efficiency pumps.

Unedited footage of the Green Hydraulic Factory5

Each pump undergoes a rigorous quality control process, where pressure tests and performance assessments are conducted to ensure that the pumps meet the required standards for flow rate, pressure capacity, and durability.


Green Hydraulic Advantages
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