CAT 2959426 (295-9426) Piston Pump | Fits 345D Excavator
CAT 2959426 (295-9426) Piston Pump | Fits 345D Excavator
CAT 2959426 (295-9426) Piston Pump | Fits 345D Excavator
Premium hydraulic piston pump designed as a direct OEM-compatible replacement for Caterpillar 345D excavator. Built to deliver consistent hydraulic performance and long service life in demanding mining, quarry, and heavy excavation applications.
Product Highlights
- Part Number: 2959426 / 295-9426
- 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: 2959426 / 295-9426
- 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 excavator:
- Caterpillar 345D 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 a CAT 345D excavator?
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 hydraulic fluid leakage around the pump housing. The 345D is a 45-ton class excavator used in heavy excavation and mining — a failing main pump causes severe productivity loss across all hydraulic functions.
Q: Which CAT models does the 2959426 piston pump fit?
A: The 2959426 (295-9426) is designed as a direct OEM-compatible replacement for the CAT 345D hydraulic excavator. Contact us with your excavator serial number to confirm exact compatibility — some 345D configurations may use a different pump variant depending on serial number range.
Q: What hydraulic functions does this pump support on the 345D?
A: As the main hydraulic pump, 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 weak, check the control valve first before replacing the pump.
Q: Should I flush the hydraulic system when replacing this pump?
A: Always. Flushing is essential — metal contaminants from the old pump can destroy the 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 recommend professional installation by a qualified technician or CAT dealer service center.
Q: What type of hydraulic oil is recommended for the CAT 345D?
A: Caterpillar specifies Cat HYDO Advanced 10W or 30W depending on ambient operating temperature. For a 45-ton excavator working in mining or quarry applications under constant heavy load, using non-CAT approved fluids can cause accelerated pump wear and void the warranty.
Q: How do I confirm this is the correct pump for my 345D?
A: Check the part number on your current hydraulic pump — if it reads 2959426 or 295-9426, this is the correct replacement. If the label is worn or missing, provide your 345D 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 345D 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.
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.
Related Products
Explore our full range of Caterpillar piston pumps.
Share
