Hydra part 441-916 is a cylinder head designed to enclose the pumping mechanism and provide mounting for valves and seals on compatible Hydra M 2000, Hydra M 4000, and Hydra Pro Super sprayers. This precision-machined component withstands high operating pressures while maintaining proper alignment of internal parts. Replacing a cracked, worn, or damaged cylinder head restores pump integrity and ensures reliable performance.
| Part Number | 441-916 |
|---|---|
| Part Description | Cylinder Head |
| Brand | Hydra |
| Fits | Hydra M 2000, 4000; Hydra Pro Super |
| Condition | New |
The Hydra 441-916 Cylinder Head is a precision-machined component that encloses the pumping mechanism on compatible Hydra sprayer models. It houses the piston or plunger, provides mounting points for inlet and outlet valves, and contains the fluid passages necessary for pump operation.
The cylinder head is critical to pump performance and longevity. It must maintain precise alignment of internal components while withstanding the high pressures generated during operation. The head also provides sealing surfaces for gaskets and O-rings that prevent fluid leaks. Over time, cylinder heads can develop cracks from pressure cycling or freeze damage, wear at sealing surfaces, or corrosion from chemical exposure. A damaged cylinder head can cause internal leaks, pressure loss, and contamination of other pump components. Replacing the cylinder head restores the integrity of the pumping system and ensures reliable performance.
| Pump enclosure | Houses the piston/plunger and pumping mechanism |
|---|---|
| Valve mounting | Provides precise mounting points for inlet and outlet valves |
| Pressure containment | Withstands operating pressures without failure |
| Cracks / fractures | Visible cracks in the cylinder head material |
|---|---|
| Worn sealing surfaces | Damage where gaskets or seals contact |
| Corrosion damage | Material degradation from chemical exposure |
| Thread damage | Stripped or damaged ports for valves or fittings |
Hydra part 441-916 is compatible with the following sprayer models. Always confirm fitment using the correct parts diagram for your exact model and serial number.
| Model | Component |
|---|---|
| Hydra M 2000 | Cylinder Head |
| Hydra M 4000 | Cylinder Head |
| Hydra Pro Super | Cylinder Head |
When replacing the cylinder head, these associated components are often replaced at the same time.
Seals between cylinder head and pump body; always replace with new head.
Inlet and outlet valves; replace to ensure proper flow control.
Seals that ride on the piston; inspect and replace if worn.
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