9871056 is a replacement O‑ring used to seal fluid passages or housing joints in the pump or fluid section of compatible SprayTech airless sprayers. It provides a leak‑tight seal against paint and solvents, preventing pressure loss and external leaks.
| Part Number | 9871056 |
|---|---|
| Part Description | O-Ring |
| Brand | SprayTech |
| Fits | SprayTech EP2105, EP2205 |
| Condition | New |
The 9871056 O‑Ring is an OEM replacement seal designed for the fluid section or hydraulic connections of SprayTech EP2105 and EP2205 airless sprayers. It is typically used to seal static joints between pump housing sections, valve retainers, or fitting connections, preventing paint leaks and maintaining system pressure.
Over time, O‑rings can become hardened, cracked, or compressed (taking a permanent set), leading to external leaks, pressure loss, or air ingestion into the fluid system. Replacing a worn or damaged O‑ring with the 9871056 restores a reliable, leak‑tight seal and prevents further damage to surrounding components.
| Static sealing | Prevents fluid leaks between stationary mating surfaces |
|---|---|
| Pressure retention | Maintains system pressure by sealing internal passages |
| Contamination prevention | Blocks entry of air or debris into the fluid system |
| External leak | Paint seeping from a joint or fitting |
|---|---|
| Hardened or cracked O‑ring | Visible damage or loss of elasticity |
| Flattened cross‑section | O‑ring no longer protrudes above the groove |
| Disassembly / overhaul | Always replace O‑rings whenever a joint is opened |
Part 9871056 is designed for the following SprayTech models. Always verify with your machine's parts diagram before ordering.
| Brand / Model | Component |
|---|---|
| SprayTech EP2105 | O‑ring (fluid section / housing / fitting seal) |
| SprayTech EP2205 | O‑ring (fluid section / housing / fitting seal) |
When replacing this O‑ring, these related components are often inspected or replaced at the same time.
Inspect the groove and sealing surface for corrosion or damage.
Some O‑ring grooves use a backup ring; replace as a set.
If rebuilding a section, replace all seals in that area.
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