PowrBeast / PowrLiner part 858-003 is a washer used in various assemblies to distribute load, provide spacing, and prevent fastener loosening due to vibration. It is commonly found in pump mounts, motor brackets, frame connections, and fluid section components. Replacing worn or missing washers helps maintain proper clamping force and prevents damage to mating surfaces.
| Part Number | 858-003 |
|---|---|
| Part Description | Washer |
| Brand | PowrBeast / PowrLiner |
| Fits | PowrBeast 4700, 7700, 9700; PowrLiner 2850, 550, 1800M, 2800M, 800 |
| Condition | New |
The PowrBeast / PowrLiner 858-003 Washer is a general‑purpose hardware component used throughout compatible sprayers. It serves multiple functions: distributing fastener load to prevent damage to mating surfaces, providing precise spacing in assemblies, and helping to maintain clamping force under vibration.
Washers can become lost during disassembly, corroded, or deformed over time. Using the correct washer ensures that bolted connections remain secure and that components are properly aligned. Replacing missing or worn washers with genuine 858-003 parts helps maintain equipment integrity and prevents loosening-related failures.
| Load distribution | Spreads fastener clamping force over a wider area to prevent surface damage |
|---|---|
| Spacing / shimming | Provides precise spacing between components for correct alignment |
| Vibration resistance | When used with lock washers or as part of a locking system, helps prevent loosening |
| Visible wear | Corrosion, deformation, or cracking that compromises function |
|---|---|
| Missing washers | During reassembly, if original washers are lost or damaged |
| Recurring loosening | Fasteners repeatedly loosen; inspect washer condition and type |
| Preventive maintenance | Replace during major overhauls to ensure reliable assembly |
Part 858-003 is used in the following PowrBeast and PowrLiner models. Always verify with your equipment’s parts manual for exact application and quantity.
| Brand / Model | Model Number | Component |
|---|---|---|
| PowrBeast 4700 (120V) | 0537000 | Washer |
| PowrBeast 4700 (Gas) | 0537001 | Washer |
| PowrBeast 7700 (230V) | 0537003 | Washer |
| PowrBeast 7700 (Gas) | 0537005 | Washer |
| PowrBeast 9700 (Gas) | 0537007 | Washer |
| PowrLiner 2850 | — | Washer |
| PowrLiner 550 | — | Washer |
| PowrLiner 1800M | — | Washer |
| PowrLiner 2800M | — | Washer |
| PowrLiner 800 | — | Washer |
Washers are typically replaced alongside the fasteners they accompany. Inspect these related items during service.
Check for thread damage, stretching, or corrosion. Replace if worn to ensure proper clamping.
If the assembly uses separate lock washers, inspect for loss of tension or damage.
Check for cracks or deformation around mounting holes that could affect washer seating.
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