Part 859-001 is a replacement seal washer used in fluid and hydraulic systems across a wide range of compatible spray equipment. This washer provides a sealing function under bolt heads or fittings, preventing fluid leaks. When the original washer becomes worn, compressed, or damaged, replacement restores leak-free sealing.
| Part Number | 859-001 |
|---|---|
| Part Description | Seal Washer |
| Brand | Universal |
| Fits | hydrax 4540 - 7230; PowrLiner 4955, 6955, 8955; PowrLiner 4000; PowrLiner 4900 XLT; PowrLiner 4900; PowrLiner 4950; PowrLiner 5000; PowrLiner 6000; PowrLiner 6900 XLT SP; PowrLiner 6900 XLT; PowrLiner 6950; PowrLiner 6950_1; PowrLiner 8900 XLT SP; PowrLiner 8900 XLT; PowrLiner 8900; PowrTex 6900SF, 12000SV 0528919D; PowrTex 6900SF, 12000SV; PowrTwin 3500 50th anniversary; PowrTwin 4500; PowrTwin 4900 , 6900 , 8900, 12000 Plus; PowrTwin 4900 XLT; PowrTwin 4900GH; PowrTwin 6900 , 12000 Plus DI; PowrTwin 6900 XLT DI; PowrTwin 6900 XLT; PowrTwin 6900GH; PowrTwin 8900GH; PowrTwin 12000 GHD; PowrTwin 12000 Plus DI service; PowrTwin 12000 XLT DI; PowrTwin 12000 XLT; PowrTwin 12000GH; PowrTwin 12000GHD; PowrTwin TM 8900 XLT |
| Condition | New |
The 859-001 seal washer is a direct replacement sealing component for an extensive range of spray equipment including hydrax 4540-7230; multiple PowrLiner models (4955/6955/8955, 4000, 4900 XLT, 4900, 4950, 5000, 6000, 6900 XLT SP, 6900 XLT, 6950, 6950_1, 8900 XLT SP, 8900 XLT, 8900); PowrTex 6900SF/12000SV (including 0528919D); and numerous PowrTwin models (3500 50th anniversary, 4500, 4900/6900/8900/12000 Plus, 4900 XLT, 4900GH, 6900/12000 Plus DI, 6900 XLT DI, 6900 XLT, 6900GH, 8900GH, 12000 GHD, 12000 Plus DI service, 12000 XLT DI, 12000 XLT, 12000GH, 12000GHD, TM 8900 XLT). This washer combines a sealing function with load distribution, typically featuring a soft sealing layer bonded to a metal backing. It is used under bolt heads, nuts, or fittings to create a leak-proof seal in fluid connections. A worn or compressed seal washer can cause fluid leaks and pressure loss. This replacement washer is manufactured to exact specifications for proper fit and sealing.
| Leak prevention | Creates seal under bolt head or fitting |
|---|---|
| Load distribution | Spreads clamping force |
| Fluid containment | Prevents fluid escape at connections |
| Compressed / flattened | Washer no longer provides effective seal |
|---|---|
| Damaged sealing layer | Cut or torn sealing material |
| Fluid leakage | Visible leak at connection |
| Missing washer | Washer lost during disassembly |
Seal washer 859-001 is compatible with the following models. Verify fit using your equipment's parts diagram.
| Compatible Series | Models |
|---|---|
| hydrax | 4540 - 7230 |
| PowrLiner | 4955, 6955, 8955; 4000; 4900 XLT; 4900; 4950; 5000; 6000; 6900 XLT SP; 6900 XLT; 6950; 6950_1; 8900 XLT SP; 8900 XLT; 8900 |
| PowrTex | 6900SF, 12000SV 0528919D; 6900SF, 12000SV |
| PowrTwin | 3500 50th anniversary; 4500; 4900, 6900, 8900, 12000 Plus; 4900 XLT; 4900GH; 6900, 12000 Plus DI; 6900 XLT DI; 6900 XLT; 6900GH; 8900GH; 12000 GHD; 12000 Plus DI service; 12000 XLT DI; 12000 XLT; 12000GH; 12000GHD; TM 8900 XLT |
When replacing seal washers, inspect these associated components to ensure proper sealing.
Check threads for damage.
Ensure surface is clean and smooth.
Inspect sealing faces for damage.
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