Part number 0278340 is a Pusher Washer or Disk that applies force to sealing components within pump assemblies on compatible SprayTech ED655 Plus and SprayTech AirCoat sprayer systems. This precision component ensures proper seal compression and reliable pump operation.
| Part Number | 0278340 |
|---|---|
| Part Description | Pusher Washer or Disk |
| Fits | SprayTech ED655 Plus; SprayTech AirCoat |
| Condition | New |
Part number 0278340 is a Pusher Washer or Disk specifically engineered for the SprayTech ED655 Plus airless pump and SprayTech AirCoat air-assisted airless spray systems. The ED655 Plus is a professional airless pump delivering reliable performance for residential and commercial painting applications. The AirCoat systems combine the speed of airless spraying with the fine finish quality of conventional air spray. This pusher washer or disk is a critical component within the pump assembly that applies force to seals and packings, ensuring proper compression and maintaining a leak-free seal under high pressure.
Manufactured from durable materials with precision-machined surfaces, this component transmits force from a nut or other fastener to the sealing elements, evenly distributing the load to ensure consistent seal compression. Proper function of the pusher washer is essential for maintaining the integrity of the fluid section and preventing material bypass. It may also serve as a bearing surface for rotating or reciprocating components.
This pusher washer is subjected to continuous high pressure, vibration, and potential corrosion. Failure modes include deformation, cracking, and wear. A damaged or missing pusher washer can lead to inadequate seal compression, causing pressure loss, leaks, and erratic pump operation. Replacement with genuine 0278340 pusher washer or disk restores proper seal loading and ensures reliable pump performance.
| Seal Compression | Applies force to seals and packings for proper sealing |
|---|---|
| Load Distribution | Evenly distributes clamping force on sealing elements |
| Pressure Maintenance | Ensures consistent seal integrity under high pressure |
| Deformation | Washer is bent, warped, or distorted |
|---|---|
| Wear | Surface wear affecting load distribution |
| Corrosion | Rust or chemical attack has compromised the washer |
| Seal Service | Replace when servicing associated seals or packings |
Part number 0278340 is specifically designed for the SprayTech ED655 Plus airless pump and the SprayTech AirCoat air-assisted airless spray systems. The ED655 Plus is a professional airless pump for residential and commercial painting applications. The AirCoat systems combine airless speed with fine finish quality. This pusher washer or disk is a component engineered for the pump assembly requirements of these professional platforms. Always confirm fitment using the correct parts diagram for your exact model and serial number.
| Compatible Models | Component |
|---|---|
| SprayTech ED655 Plus | Pusher Washer or Disk |
| SprayTech AirCoat |
The pusher washer is typically used with seals, packings, and retaining nuts. When servicing this component, these related parts are often addressed at the same time.
The sealing elements compressed by the washer. Replace during service.
The nut that applies force through the washer. Inspect threads.
The component the washer may contact. Inspect for wear.
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