CAT 1243027 (124-3027) Piston Pump | Fits 12G 140G 160G Motor Grader

CAT 1243027 (124-3027) Piston Pump | Fits 12G 140G 160G Motor Grader

Premium hydraulic piston pump designed as a direct OEM-compatible replacement for Caterpillar 12G, 140G, and 160G motor graders. Built to deliver consistent hydraulic power for blade control, steering, and attachment operation in demanding road maintenance, grading, and earthmoving applications.

Product Highlights

• Part Number: 1243027 / 124-3027
• Direct Fit: No modifications required
• High Performance: Meets or exceeds original Caterpillar specifications
• Durable Construction: Precision-engineered for long service life
• Wide Application: Suitable for road maintenance, grading, and earthmoving projects

Technical Specifications

• Part Number: 1243027 / 124-3027
• Product Type: Variable Displacement Piston Pump
• Brand Compatibility: Caterpillar (CAT)
• Application: Hydraulic System
• Warranty: 12 Months

Compatible Models

This piston pump fits the following Caterpillar motor grader models:

• Caterpillar 12G Motor Grader
• Caterpillar 140G Motor Grader
• Caterpillar 160G Motor Grader

Applications

• Main Hydraulic Pump Replacement
• Blade Lift, Angle, and Circle Control Systems
• Steering and Ripper Circuits
• Road Maintenance, Grading, and Earthmoving Projects

Why Choose This Pump?

• Quality Guaranteed - Manufactured to meet OEM standards
• Ready to Ship - In stock and available for immediate dispatch
• Expert Support - Technical assistance available
• Competitive Pricing - Cost-effective alternative to dealer parts

Frequently Asked Questions

Q: What are the symptoms of a failing hydraulic piston pump on CAT 12G, 140G, or 160G motor graders?
A: Common signs include slow or weak blade lift and tilt response, the blade hesitating or failing to hold grade position, hydraulic oil overheating during extended grading operations, whining or knocking noise from the pump area, and visible hydraulic fluid leakage. The 12G, 140G, and 160G are older-series motor graders still widely used in road maintenance — pump failure causes loss of blade control accuracy and reduced grading efficiency.

Q: Does the 1243027 fit all three motor grader models?
A: Yes, the 1243027 (124-3027) is designed as a direct OEM-compatible replacement for the CAT 12G, 140G, and 160G motor graders. These models share the same pump mounting and hydraulic system architecture. Contact us with your motor grader serial number to confirm exact compatibility.

Q: What hydraulic functions does this pump support on a motor grader?
A: As the main hydraulic pump, it supplies flow to the blade lift and tilt circuits, circle drive, articulation (steering), and ripper functions. Precision grading requires consistent hydraulic flow — a failing pump causes the blade to drift, hesitate, or lose position accuracy, directly affecting grade quality. The 12G/140G/160G series are widely used in road maintenance, where grade accuracy is critical for road safety and performance.

Q: Should I flush the hydraulic system when replacing this pump on an older motor grader?
A: Always, and with extra attention. Older motor graders like the 12G, 140G, and 160G may have accumulated more system contamination over their service life. Metal particles and contaminants from the old pump, combined with years of environmental exposure, can destroy the new pump within hours. Drain and replace all hydraulic oil, flush the system thoroughly, replace all filters, and refill with fresh Cat HYDO Advanced hydraulic oil.

Q: What type of hydraulic oil is recommended for the 12G, 140G, and 160G motor graders?
A: Caterpillar specifies Cat HYDO Advanced 10W or 30W depending on ambient operating temperature. Older motor graders in road construction and maintenance applications should use Cat-approved fluids to ensure long pump life and maintain grading accuracy. Using non-approved fluids can cause accelerated wear and void the warranty.

Q: How do I confirm this is the correct pump for my motor grader?
A: Check the part number on your current hydraulic pump — if it reads 1243027 or 124-3027, this is the correct replacement. If the label is worn or missing (common on older machines), provide your motor grader serial number and we will verify compatibility before you order.

Q: Does this pump come with mounting hardware or gaskets included?
A: The pump is supplied as a complete unit. Depending on your motor grader configuration, you may need separate mounting bolts, gaskets, or O-rings. Contact us with your serial number and we will confirm exactly what is included and what additional parts you may need for installation.

Q: What is the warranty on this hydraulic piston pump?
A: This piston pump comes with a 12-month warranty covering manufacturing defects. The warranty does not cover damage caused by contaminated hydraulic oil, improper installation, failure to flush the hydraulic system, or using non-CAT approved hydraulic fluids.

Looking for this hydraulic pump? Contact us today for pricing, availability, and lead time information.

Request a Quote

Related Products

Explore our full range of Caterpillar piston pumps.