1616634 Main Hydraulic Pump for Caterpillar 416C, 426C & 428C Backhoe Loaders | 161-6634 Replacement Unit

High-performance replacement main hydraulic pump engineered specifically for Caterpillar C-Series backhoe loaders (416C, 426C, 428C). This 161-6634 (1616634) unit provides the essential high-pressure flow required to power your machine's critical digging, loading, and steering functions.

Restore Your CAT Loader’s Hydraulic Power Is your CAT 416C or 428C losing its edge? Sluggish bucket response and weak breakout force are signs of a failing main pump. Our 1616634 replacement pump is the definitive solution to restore your machine's original speed and lifting capacity, ensuring zero compromise on productivity.

Built for Heavy-Duty Reliability:

Precision Engineering: Exact dimensional matching to the 161-6634 OEM unit ensures a direct bolt-on installation without any field modifications.

Extreme Durability: Features a reinforced cast iron body and high-grade internal pistons designed to withstand 350+ Bar pressures in the most punishing excavation environments.

Superior Efficiency: Optimized variable displacement technology helps reduce fuel consumption while maintaining maximum hydraulic output under load.

Q: Which Caterpillar models are the primary targets for the 1616634 hydraulic pump?

A: The 1616634 (161-6634) hydraulic pump is the primary main pump for Caterpillar 416C, 426C, and 428C backhoe loaders, as well as some 436C and 438C arrangements.

Q: How does the 161-6634 pump improve CAT 426C cycle times?

A: By delivering a consistent, high-pressure oil flow, the 1616634 pump ensures that hydraulic actuators respond faster and more powerfully, effectively reducing cycle times for digging and loading.

Q: What installation steps are recommended for a new 1616634 replacement pump?

A: For maximum pump life, it is critical to flush the hydraulic system, replace all filters, and prime the new 161-6634 pump with clean oil before the first engine start to prevent cavitation damage.

Guangzhou Tieqi Engineering Machinery Co., Ltd. ("IRON CAVALRY") is strategically located in Guangzhou's Huangpu District, approximately one hour from Baiyun International Airport. With nearly 15 years of specialized experience in engineering machinery hydraulics, we have established ourselves as industry leaders in heavy equipment components.

• Ready inventory of over 500 assembly types, providing access to more than 6,000 different parts
• Core products include hydraulic pumps, control valves, travel, and swing assemblies
• Specialization in large mining excavator components and hard-to-find items
• 4,000-square-meter factory equipped for professional manufacturing, precision assembly, and rigorous testing
• Integrated supply chain providing cost-effective, convenient one-stop solutions

For large items, we use sturdy plywood crates secured with metal fasteners. Products are carefully cushioned with bubble wrap and secured with wooden braces. External crate reinforcement includes high-strength PET plastic strapping and waterproof black film to ensure safe transit and delivery.

• One-stop solution for all your hydraulic needs
• High-quality products at competitive prices
• Exceptional customer service that makes you feel at home
• Large inventory with short delivery times and long warranty periods
• Professional expertise with accurate data for excavator part number inquiries
• Ability to source parts for nearly all your equipment needs

For detailed specifications, pricing information, or technical consultation, please contact our sales team for personalized assistance.