CAT 1438080 (143-8080) Piston Motor | Fits 345B 345B L Excavator

CAT 1438080 (143-8080) Piston Motor | Fits 345B 345B L Excavator

Premium hydraulic piston motor designed as a direct OEM-compatible replacement for Caterpillar 345B and 345B L hydraulic excavators. Built to deliver reliable swing, travel, or implement drive power and long service life in demanding excavation, mining, and heavy earthmoving applications.

Product Highlights

• Part Number: 1438080 / 143-8080
• 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 excavation, mining, and heavy earthmoving projects

Technical Specifications

• Part Number: 1438080 / 143-8080
• Product Type: Hydraulic Piston Motor
• Brand Compatibility: Caterpillar (CAT)
• Application: Swing or Travel Drive System
• Warranty: 12 Months

Compatible Models

This piston motor fits the following Caterpillar excavator models:

• Caterpillar 345B Hydraulic Excavator
• Caterpillar 345B L Hydraulic Excavator

Applications

• Swing Drive Motor Replacement
• Travel Drive Motor Replacement
• Hydraulic Implement System Repair
• Excavation, Mining, and Heavy Earthmoving Projects

Why Choose This Piston Motor?

• 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 motor on CAT 345B or 345B L excavators?
A: Common signs include slow or failed swing/rotation, the excavator upper structure failing to rotate smoothly, travel drive becoming sluggish or non-responsive, hydraulic oil overheating during operation, whining or grinding noise from the motor area, and visible hydraulic fluid leakage. The 345B and 345B L are large excavators used in heavy construction and excavation — piston motor failure causes loss of swing or travel capability, severely limiting machine functionality.

Q: Does the 1438080 fit both the 345B and 345B L excavators?
A: Yes, the 1438080 (143-8080) is designed as a direct OEM-compatible replacement for both the CAT 345B and 345B L hydraulic excavators. These models share the same motor mounting and hydraulic system architecture. Contact us with your excavator serial number to confirm exact compatibility.

Q: What hydraulic functions does this piston motor support on an excavator?
A: The 1438080 piston motor is typically used for swing drive (rotating the upper structure) and/or travel drive (propeling the excavator). A failing swing motor causes the excavator to rotate slowly or not at all — this severely impacts digging efficiency and cycle times. A failing travel motor causes sluggish or failed track movement. Given the 345B's size and production demands, motor issues should be diagnosed and addressed promptly to avoid expensive downtime.

Q: Should I flush the hydraulic system when replacing this piston motor on a large excavator?
A: Always, and with extra diligence. Large excavators like the 345B operate under extreme continuous load. Metal particles and contaminants from the old motor can destroy the new motor within hours. Drain and replace all hydraulic oil, flush the system thoroughly with clean oil, replace all filters, and refill with fresh Cat HYDO Advanced hydraulic oil. We strongly recommend professional installation by a qualified technician or CAT dealer service center.

Q: What type of hydraulic oil is recommended for the CAT 345B and 345B L?
A: Caterpillar specifies Cat HYDO Advanced 10W or 30W depending on ambient operating temperature. For large excavators operating under constant heavy load, using non-CAT approved hydraulic fluids can cause immediate motor failure, accelerated wear, and void the warranty.

Q: How do I confirm this is the correct piston motor for my excavator?
A: Check the part number on your current piston motor — if it reads 1438080 or 143-8080, this is the correct replacement. If the label is worn or missing, provide your 345B or 345B L serial number and we will verify compatibility before you order.

Q: Does this piston motor come with mounting hardware or gaskets included?
A: The motor is supplied as a complete unit. Depending on your excavator 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 motor?
A: This piston motor 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 piston motor? Contact us today for pricing, availability, and lead time information.

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