Aircoat part 0533403 is a leather V-packing used as a primary seal in the pump fluid section of compatible sprayers. This specially treated leather packing creates a dynamic seal around the piston, preventing fluid bypass and maintaining pressure during operation. It is an essential replacement part when rebuilding the pump on Aircoat 423 GB_D_F models.
| Part Number | 0533403 |
|---|---|
| Part Description | Leather V-Packing |
| Brand | Aircoat |
| Fits | Aircoat 423 GB_D_F |
| Condition | New |
The Aircoat 0533403 leather V-packing is a traditional sealing element made from specially treated and impregnated leather, formed into a V-shaped profile. It is designed to create a tight, self-adjusting seal around the piston in the fluid section of airless sprayer pumps.
Leather packings offer excellent wear resistance, low friction, and the ability to conform to slight irregularities in the piston or cylinder surface. Over time, leather packings can dry out, harden, or wear thin, leading to pressure loss and fluid bypass. Replacing the V-packing during pump service restores proper sealing and extends pump life.
| Creates dynamic piston seal | Prevents fluid from bypassing the piston during the pressure stroke |
|---|---|
| Self-adjusting design | V-shaped profile expands under pressure for tighter seal |
| Low friction operation | Leather provides smooth movement with minimal wear |
| Conforms to surfaces | Adapts to minor imperfections in piston or cylinder |
| Loss of pressure | Sprayer cannot reach or maintain operating pressure |
|---|---|
| Fluid leakage | Paint leaking from pump throat or weep hole |
| During pump rebuild | Always replace packings when the pump is disassembled |
| Hardening or cracking | Leather that has dried out or shows surface cracks |
| Excessive piston wear | Worn packings accelerate piston damage |
Aircoat part 0533403 is designed specifically for use with the following sprayer model. Always verify your pump configuration before ordering.
| Brand / Model | Component |
|---|---|
| Aircoat 423 GB_D_F | Leather V-Packing |
When replacing the leather V-packing, these components are often inspected or replaced to ensure a complete fluid section overhaul.
Inspect for scoring or wear; replace if the sealing surface is damaged.
Check threads and sealing surface; replace if worn or damaged.
Inspect for scoring, pitting, or wear that could affect new packings.
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