The D 149283 Main Hydraulic Pump (HERCULES) is a critical component of the hydraulic system in Case 580 K Series 3 and Super K backhoe loaders. This pump is responsible for generating and supplying hydraulic pressure required to operate essential machine functions such as the loader, backhoe boom, dipper, bucket, stabilizers, and steering system.
Manufactured by HERCULES, this main pump is engineered to meet OEM-equivalent specifications, ensuring reliable pressure output, smooth hydraulic response, and long service life under heavy-duty working conditions.
High-quality HERCULES replacement hydraulic pump
Stable and consistent hydraulic pressure output
Supports full hydraulic functions (loader & backhoe operations)
Precision-machined internal components for reduced wear
Durable construction for heavy-duty and continuous operation
Direct replacement – no modification required
A properly functioning main hydraulic pump ensures:
Smooth and responsive loader and backhoe movements
Stable hydraulic pressure during digging and lifting
Reduced stress on hydraulic cylinders and valves
Improved machine productivity and operational safety
Weak or slow hydraulic movements
Loss of hydraulic power under load
Noisy pump operation (whining or grinding sound)
Overheating hydraulic oil
Jerky or uneven machine response
Recommendation:
If these symptoms occur, inspect the hydraulic pump, hydraulic oil condition, filters, and suction lines. Replacing a worn main pump promptly helps prevent further damage to the hydraulic system.
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Case 580 K Series 3
Case 580 Super K
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