CAT 2540059 (254-0059) Piston Pump Parts | Fits D6T D8T D8R 973K AD55B
CAT 2540059 (254-0059) Piston Pump Parts | Fits D6T D8T D8R 973K AD55B
In Stock & Ready for Global Express Dispatch
Request a Quick Quote✓ Premium Caterpillar Quality Spec | ✓ 100% Direct Fit | ✓ Fast Global Shipping
Premium hydraulic piston pump repair parts (rotary group assembly) designed as a direct OEM-compatible replacement for Caterpillar (CAT) heavy equipment. Precision-engineered to rebuild and overhaul main hydraulic pumps, restoring original volumetric efficiency, precise flow control, and extended service life under severe earthmoving, mining, and construction conditions.
Product Highlights
- Part Number: 2540059 / 254-0059
- Direct Fit OEM Replacement: Form, fit, and tolerances perfectly match original Caterpillar engineering specifications for seamless pump reassembly and rebuilds.
- Heavy-Duty Construction: Manufactured with ultra-hardened steel alloys and wear-resistant internal precision components to handle high hydraulic working pressures and heavy thermal cycles.
- Cost-Effective Overhaul Solution: Restores full hydraulic system power, cycle speeds, and pressure capacity back to factory standards at a fraction of the cost of a new pump.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 2540059 / 254-0059 |
| Product Type | Piston Pump Repair Kit / Rotary Group Parts |
| Brand Compatibility | Caterpillar (CAT) |
| Application | Main Hydraulic Pump Maintenance & Overhaul |
| Material | High-Strength Alloy Steel & Precision-Machined Components |
| Warranty | 12 Months Warranty |
Compatible Models & Equipment
These premium piston pump replacement parts are precision-engineered to fit the following Caterpillar heavy machinery models:
- Track-Type Tractors (Dozers): D6T / D6T LGP / D6T LGPPAT / D6T XL / D6T XL PAT / D6T XW / D6T XW PAT / D8 / D8N / D8R / D8T
- Track Loaders: 973 / 973K
- Underground Mining Articulated Trucks: AD55B / AD60 / AD63
Key Applications
- Hydraulic Pump Rebuilding: Replaces worn or damaged internal rotary group components including cylinder blocks, piston shoes, valve plates, retainer plates, and swashplate contact parts.
- Pressure & Speed Restoration: Eliminates internal fluid bypass, slow hydraulic implement response, overheating, and pump noise caused by internal component wear.
- Preventative Maintenance: Provides heavy equipment repair shops and field mechanics with precision-matched components for reliable scheduled pump overhauls.
Why Choose Our Aftermarket CAT Parts?
- Guaranteed OEM Quality: Manufactured under strict ISO 9001 quality standards to match original Caterpillar factory dimensions, surface finishes, and hardness levels.
- Cost-Effective Solution: Achieve premium dealer-level reliability and identical hydraulic performance at a fraction of the OEM replacement price.
- Ready to Ship: Kept in stock for immediate worldwide dispatch to reduce your machine's idle downtime significantly.
- Industry-Leading Support: Backed by a full 1-year warranty and a team of professional heavy machinery hydraulic technical experts.
Frequently Asked Questions (FAQ)
Q: Are these piston pump parts genuine Caterpillar items?
A: These are premium-grade, OEM-compatible aftermarket replacement parts. They are manufactured to exact CAT dimensional tolerances and technical specifications, serving as a direct drop-in replacement for part number 254-0059.
Q: What is covered under the 12-month warranty?
A: Our 12-month warranty fully covers all manufacturing defects, material failures, and workmanship issues under standard operating conditions.
Q: What steps should be taken during installation?
A: Ensure the main pump housing is completely cleaned and free of debris. Always flush the main hydraulic system, install new hydraulic oil filters, and refill with fresh oil to prevent contamination from damaging newly installed parts upon startup.
Q: How long does international shipping take?
A: In-stock orders are typically dispatched within 3–5 business days. We offer expedited shipping and global air freight options for emergency machine breakdown situations.
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