

Part number 871-001 is a C-washer used to retain components on shafts or pins in compatible Hydra M, Hydra Pro, and related sprayer systems. This precision fastener provides secure retention while allowing for easy installation and removal during service.
| Part Number | 871-001 |
|---|---|
| Part Description | C-washer |
| Fits | 0528925N_2000_4000; Hydr M nad Hydra Pro Super; Hydra M and Hydra Pro 2000_4000 |
| Condition | New |
Part number 871-001 is a C-washer specifically engineered for use across a range of professional sprayer systems including 0528925N_2000_4000, Hydra M and Hydra Pro Super, and Hydra M and Hydra Pro 2000_4000 models. These industrial-grade units are designed for demanding coating applications requiring reliable, high-pressure fluid delivery up to 4000 PSI. A C-washer, also known as a half-moon washer or retaining washer, is a specialized fastener used to retain components on shafts, pins, or studs. Its distinctive C-shaped cutout allows it to be installed or removed without completely disassembling the shaft assembly, making it ideal for serviceable connections in pumps, motors, and linkage mechanisms.
Manufactured from high-strength materials with precision-formed geometry, this C-washer provides reliable retention while withstanding the forces and vibration encountered in high-pressure sprayer applications. The open-sided design allows it to slide into a machined groove on a shaft, locking components such as gears, pulleys, or linkages in place. When installed, the C-washer fills the groove and prevents axial movement of the retained component. Its shape allows for easy installation and removal with simple tools, facilitating field service and repair without specialized equipment.
These washers are subjected to continuous vibration, cyclic loading, and potential corrosion. Failure modes include wear or deformation of the C-shaped opening, corrosion weakening the material, and loss of retention force. A damaged or missing C-washer can allow retained components to shift on their shafts, leading to misalignment, increased wear, and potential equipment failure. Replacement with genuine 871-001 C-washer ensures proper component retention and maintains the mechanical integrity of Hydra M, Hydra Pro, and related spray systems.
| Component Retention | Locks gears, pulleys, or linkages on shafts |
|---|---|
| Easy Service Access | C-shaped design allows removal without full disassembly |
| Axial Positioning | Prevents components from moving along shaft |
| Wear | C-shaped opening is worn or deformed |
|---|---|
| Corrosion | Rust or chemical attack has weakened the washer |
| Loose Retention | Component has axial play on shaft |
| Missing | Washer lost during disassembly or operation |
Part number 871-001 is specifically designed for use across a range of professional sprayer systems including 0528925N_2000_4000, Hydra M and Hydra Pro Super, and Hydra M and Hydra Pro 2000_4000 models. These industrial-grade units deliver up to 4000 PSI operating pressure for commercial and industrial coating applications. The C-washer is a model-specific component engineered for the shaft diameters, groove dimensions, and load requirements of these particular sprayer systems. Always confirm fitment using the correct parts diagram for your exact model and serial number.
| Compatible Models | Component |
|---|---|
| 0528925N_2000_4000 | C-washer |
| Hydr M nad Hydra Pro Super | |
| Hydra M and Hydra Pro 2000_4000 |
The C-washer is typically used with a shaft and retained component. When servicing, these related parts are often addressed at the same time.
The component the C-washer retains. Inspect retaining groove for wear or damage.
Gear, pulley, or linkage held by C-washer. Check for wear at contact points.
Proper pliers or tools for C-washer installation prevent damage.