Part 107-029 is a displacement rod designed for high‑performance airless paint sprayers and line stripers. This precision‑ground rod transmits reciprocating motion from the drive system to the piston, creating the pumping action that delivers paint at high pressure. Replacing a worn, scored, or bent displacement rod restores pumping efficiency, prevents fluid leakage, and extends the life of the packings and cylinder.
| Part Number | 107-029 |
|---|---|
| Part Description | Displacement Rod |
| Brand | PowrBeast / PowrLiner / PowrTwin / OEM Replacement |
| Fits | PowrBeast 4700, 7700, 9700; PowrLiner 4000, 4900 XLT, 4950, 4900, 6950, 4955, 6955, 8955; PowrTwin 4900, 6900, 8900, 12000 Plus, 4500, 4900 XLT |
| Condition | New |
The 107-055 Outlet Valve Housing is a precision‑machined component that houses the outlet ball and seat assembly in the fluid pump. It serves as the high‑pressure outlet port, directing paint from the pump to the hose and spray gun. This housing must withstand extreme pressures and corrosive materials, making its integrity critical to pump performance.
Over time, the housing can develop cracks, corrosion, or wear on the sealing surfaces, leading to fluid leaks, pressure loss, or complete pump failure. A damaged outlet valve housing may also cause the ball and seat to seat improperly, resulting in inconsistent spray or material drool. Replacing the housing restores a proper sealing surface, eliminates leaks, and ensures reliable pressure generation.
| Outlet port | Provides the high‑pressure connection point from the pump to the hose system |
|---|---|
| Valve seat interface | Houses the outlet valve seat and ball, forming the one‑way seal that prevents backflow |
| Pressure containment | Withstands operating pressures up to 3000+ PSI without cracking or leaking |
| Visible cracks | Cracks in the casting or machined body – immediate replacement required |
|---|---|
| Corrosion / pitting | Rust or erosion on sealing surfaces prevents proper ball/seat seating |
| Fluid leakage | Paint seeping from around the housing, even after new seals are installed |
| Pressure loss | Pump fails to hold pressure or pressure drops during operation |
The 107-055 Outlet Valve Housing is compatible with the following models. Always verify fitment using your machine's parts diagram.
| Model | Component |
|---|---|
| PowrBeast 4700 | Outlet Valve Housing |
| PowrBeast 7700 | Outlet Valve Housing |
| PowrBeast 9700 | Outlet Valve Housing |
| PowrLiner 4900 XLT | Outlet Valve Housing |
| PowrLiner 4950 | Outlet Valve Housing |
| PowrLiner 6950 | Outlet Valve Housing |
| PowrLiner 4955 | Outlet Valve Housing |
| PowrLiner 6955 | Outlet Valve Housing |
| PowrLiner 8955 | Outlet Valve Housing |
| PowrTwin 4900 | Outlet Valve Housing |
| PowrTwin 6900 | Outlet Valve Housing |
| PowrTwin 8900 | Outlet Valve Housing |
| PowrTwin 12000 Plus | Outlet Valve Housing |
| PowrTwin 4900 XLT | Outlet Valve Housing |
When replacing the outlet valve housing, these associated components are typically inspected or replaced to ensure complete and reliable pump repair.
The valve components that seal inside the housing; always replace when installing a new housing to ensure a perfect seal.
The inlet ball and seat work in concert with the outlet valve; if one is worn, the other may also be compromised.
If the pump was leaking or losing pressure, the packings and rod may also need service.
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