315-917 is a pump block designed for use in the fluid section of Hydra M 2000, Hydra M 4000, and Hydra Pro Super sprayers. This block houses the internal components of the pump, providing the structural foundation for the fluid section. Replacing a worn, cracked, or damaged pump block restores proper alignment and sealing, ensuring reliable pump performance and preventing fluid leaks.
| Part Number | 315-917 |
|---|---|
| Part Description | Pump Block |
| Brand | Hydra |
| Fits | Hydra M 2000, Hydra M 4000, Hydra Pro Super |
| Condition | New |
The 315-917 Pump Block is a critical structural component of the fluid section in Hydra M 2000, Hydra M 4000, and Hydra Pro Super sprayers. It provides the precision-machined housing that contains the piston, packings, and valve assemblies. A properly functioning pump block ensures correct alignment of moving parts, maintains sealing integrity, and withstands the high pressures generated during operation.
Over time, pump blocks can develop cracks, wear, or corrosion due to harsh coatings, pressure cycling, or improper maintenance. A damaged pump block may cause fluid leaks, pressure loss, misalignment of internal components, or complete pump failure. Replacing the pump block restores the structural integrity of the fluid section and allows the sprayer to perform reliably.
| Houses internal components | Provides structural housing for piston, packings, and valves |
|---|---|
| Maintains alignment | Ensures proper positioning of moving parts for efficient operation |
| Withstands pressure | Designed to handle high operating pressures without leaking or cracking |
| Visible cracks or damage | Cracks, corrosion, or deformation in the pump block |
|---|---|
| Fluid leaks | External leaks originating from the block itself |
| Pressure loss | Inability to build or maintain stall pressure despite new seals |
| During major rebuild | Replace when overhauling the entire fluid section |
Hydra part 315-917 is compatible with the following sprayer models. Always confirm fitment using the correct parts diagram for your exact model and serial number.
| Models | Component |
|---|---|
| Hydra M 2000 | Pump Block |
| Hydra M 4000 | Pump Block |
| Hydra Pro Super | Pump Block |
When replacing the pump block, these associated components are often inspected and replaced at the same time to ensure a complete repair.
The piston moves inside the block; inspect for scoring or wear.
Always replace all packings and seals when installing a new pump block.
Inspect inlet and outlet valves; replace if worn or pitted.
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