CAT 3278163 (327-8163) Rotating GP-Pump | Fits 416E 428E 621K 988K C15
CAT 3278163 (327-8163) Rotating GP-Pump | Fits 416E 428E 621K 988K C15
Premium hydraulic rotating group and pump component designed as a direct OEM-compatible replacement for Caterpillar (CAT) heavy machinery and diesel engines, ensuring precision power transfer and fluid displacement. Built to deliver optimal volumetric efficiency, smooth rotation, and reliable service life under demanding heavy-equipment operation.
Product Highlights
- Part Number: 3278163 / 327-8163
- Direct Fit OEM Replacement: Engineered to exact Caterpillar manufacturing dimensions and tolerances for seamless installation without modification.
- Heavy-Duty Precision Components: Crafted from high-strength alloy steel and wear-resistant internal parts to withstand high hydraulic pressures and extreme load cycles.
- Optimized Hydraulic Performance: Precision-ground rotating components minimize mechanical friction, reduce fluid power loss, and ensure smooth, consistent pressure delivery.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 3278163 / 327-8163 |
| Product Type | Rotating Group / Hydraulic Pump Component |
| Brand Compatibility | Caterpillar (CAT) |
| Application | Main Hydraulic Pump & Transmission Hydraulics |
| Material | High-Strength Alloy Steel & Friction-Resistant Materials |
| Warranty | 6 Months Warranty |
Compatible Models & Equipment
This premium rotating group pump assembly is precision-engineered to fit a broad range of Caterpillar machinery and equipment:
- Backhoe Loaders: 414E, 416E, 416F, 422E, 422F, 424B, 424B HD, 428E, 428F, 434E, 434F
- Wheel Loaders & Forest Machines: 988K, 568 FM LL
- Wheel Tractor-Scrapers: 621H, 621K, 623H, 623K LRC, 627H, 627K LRC
- Diesel Engines & Transmissions: C15, TH35-C15T
Key Applications
- Hydraulic System Overhaul & Rebuild: Essential internal core component for rebuilding worn hydraulic pumps to restore full operational pressure and flow efficiency.
- Heavy Construction & Earthmoving: Designed to maintain high hydraulic responsiveness during intensive digging, loading, and scraping operations.
- Industrial & Forestry Duty: Built for reliable performance under heavy power demands in demanding logging, mining, and highway tractor applications.
Why Choose Our Aftermarket CAT Parts?
- Guaranteed OEM Compatibility: Manufactured under strict ISO 9001 quality guidelines to match original CAT specifications and dimensional accuracy.
- Cost-Effective Reliability: Restore factory hydraulic power and performance at a fraction of genuine OEM dealer pricing.
- Ready to Ship: Kept in stock for immediate dispatch to reduce machine downtime and keep your fleet operational.
- Dedicated Technical Support: Backed by a 6-month warranty and professional heavy machinery hydraulic expertise.
Frequently Asked Questions (FAQ)
Q: Is this rotating GP pump assembly a genuine Caterpillar part?
A: This is a premium-grade, OEM-compatible aftermarket replacement component. It is engineered to exact Caterpillar technical specifications, serving as a direct drop-in replacement for part number 327-8163 (3278163).
Q: What is covered under the 6-month warranty?
A: Our 6-month warranty covers all manufacturing defects, material flaws, and precision tolerance issues under standard operating and installation procedures.
Q: What maintenance step is critical when replacing the 327-8163 rotating group?
A: Always thoroughly flush the hydraulic system, clean the reservoir, and replace the hydraulic filter. Make sure to fill the pump housing with fresh hydraulic oil prior to startup to prevent dry friction damage.
Q: How fast can this part be shipped for an emergency repair?
A: In-stock items typically ship out within 3–5 business days. We offer expedited air freight options to minimize equipment idle time during urgent repairs.
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