Part 420-251 is a replacement case drain hose used in hydraulic systems on compatible spray equipment. This hose returns excess fluid from the motor or pump case to the reservoir, maintaining proper fluid levels and preventing pressure buildup. When the original hose becomes cracked, leaks, or collapses, replacement restores proper hydraulic system function.
| Part Number | 420-251 |
|---|---|
| Part Description | Case Drain Hose |
| Brand | Universal |
| Fits | Power Beast; PowerBeast; PowrLiner 4955, 6955, 8955; PowrLiner 4950; PowrLiner 6950; PowrLiner 6950_1; PowrTwin 4900 , 6900 , 8900, 12000 Plus; PowrTwin 6900 , 12000 Plus DI; PowrTwin 12000 Plus DI service |
| Condition | New |
The 420-251 case drain hose is a direct replacement hydraulic component for Power Beast, PowerBeast, PowrLiner 4955, 6955, 8955, PowrLiner 4950, PowrLiner 6950, PowrLiner 6950_1, and multiple PowrTwin models including 4900, 6900, 8900, 12000 Plus, 6900 Plus DI, 12000 Plus DI, and 12000 Plus DI service units. This hose connects the motor or pump case drain port to the hydraulic reservoir, allowing internal leakage fluid to return to the tank. This flow prevents pressure buildup in the case, carries away heat, and removes wear particles. A damaged or leaking case drain hose can cause fluid loss, contamination, and inadequate cooling, leading to component damage. This replacement hose is manufactured to exact length and fitting specifications, with hose construction rated for hydraulic system pressures and temperatures. It includes pre-installed end fittings for direct replacement. Regular inspection of hydraulic hoses helps identify wear, cracking, or leaks before they cause system failure.
| Fluid return | Returns case leakage fluid to reservoir |
|---|---|
| Pressure relief | Prevents pressure buildup in motor/pump case |
| Heat removal | Carries away heat from internal components |
| Fluid leaks | Visible hydraulic fluid escaping from hose |
|---|---|
| Cracked / abraded | Outer cover damage exposing reinforcement |
| Collapsed hose | Internal collapse restricts flow |
| Fitting damage | End fittings corroded or leaking |
Case drain hose 420-251 is compatible with the following models. Verify fit using your equipment's parts diagram.
| Compatible Models |
|---|
| Power Beast; PowerBeast |
| PowrLiner 4955, 6955, 8955 |
| PowrLiner 4950; PowrLiner 6950; PowrLiner 6950_1 |
| PowrTwin 4900, 6900, 8900, 12000 Plus |
| PowrTwin 6900, 12000 Plus DI |
| PowrTwin 12000 Plus DI service |
When replacing the case drain hose, inspect these associated components to ensure proper hydraulic system function.
Check fluid level and condition; replace filter if contaminated.
Inspect for leaks or unusual noise.
Ensure connections are secure and not damaged.
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