CAT 2590815 (259-0815) Piston Pump | Fits 330D 336D M330D Excavator
CAT 2590815 (259-0815) Piston Pump | Fits 330D 336D M330D Excavator
CAT 2590815 (259-0815) Piston Pump | Fits 330D 336D M330D Excavator
Premium hydraulic piston pump designed as a direct OEM-compatible replacement for Caterpillar 330D, 336D, and M330D excavators. Built to deliver consistent hydraulic performance and long service life in demanding mining, quarry, and heavy excavation applications.
Product Highlights
- Part Number: 2590815 / 259-0815
- 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 mining, quarry, and heavy excavation projects
Technical Specifications
- Part Number: 2590815 / 259-0815
- 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 excavators:
- Caterpillar 330D Excavator
- Caterpillar 336D Excavator
- Caterpillar M330D Excavator
Applications
- Excavator Boom and Arm Hydraulic Circuits
- Excavator Bucket and Slewing Functions
- Heavy-Duty Digging and Trenching Operations
- Mining, Quarry, and Heavy Excavation 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 330D, 336D, or M330D excavators?
A: Common signs include slow or weak boom, arm, and bucket response, the excavator struggling to dig or lift under load, hydraulic oil overheating during normal operation, whining or knocking noise from the pump area, and visible external hydraulic fluid leakage around the pump housing. The 330D, 336D, and M330D are 30–36 ton class excavators used in heavy excavation, quarry, and mining — a failing main pump will cause significant productivity loss across all hydraulic functions.
Q: Does the 2590815 fit all three models — 330D, 336D, and M330D?
A: Yes, the 2590815 (259-0815) is designed as a direct OEM-compatible replacement for the CAT 330D, 336D, and M330D hydraulic excavators. All three share the same pump mounting and hydraulic system architecture. The M330D is a material handler variant with similar hydraulic demands. Contact us with your excavator serial number to confirm exact compatibility.
Q: What hydraulic functions does this pump support?
A: As the main hydraulic pump on the 330D, 336D, and M330D, it supplies flow to all major hydraulic circuits — boom, arm, bucket, swing, and travel functions. A failing main pump causes weak or slow operation across all functions simultaneously. If only one function is affected, the problem may be a control valve rather than the pump itself.
Q: Should I flush the hydraulic system when replacing this pump?
A: Always. Flushing the hydraulic system is essential. Metal particles and contaminants from the old pump can destroy a new pump within hours. Drain and replace all hydraulic oil, flush the system 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 330D, 336D, and M330D?
A: Caterpillar specifies Cat HYDO Advanced 10W or 30W depending on ambient operating temperature. Using non-CAT approved hydraulic fluids can cause immediate pump failure, accelerated wear, and void the warranty. Always use fresh, clean Cat-approved hydraulic oil when replacing the pump.
Q: How do I confirm this is the correct pump for my excavator?
A: Check the part number on your current hydraulic pump — if it reads 2590815 or 259-0815, this is the correct replacement. If the label is worn or missing, provide your excavator 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 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 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.
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