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Graco 104131 Packing O-Ring

The Graco 104131 Packing O-Ring provides a precise OEM seal for select Graco assemblies, ensuring leak-free performance and long service life.

  • Part Number: 104131
  • Type: Packing O-Ring (Seal)
  • Material: Fluoroelastomer (FKM)
  • Used In: Assemblies LC0111 and LC0231
  • Purpose: Prevents air or fluid leakage in pressure systems

$146.5
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Compatibility & OEM Details (Part 104131)

Compatible Machines

A direct model list is not published by the OEM for this item. The Graco 104131 Packing O-Ring is specified for the following assemblies; match your equipment’s parts manual to confirm fit:

  • Assembly LC0111 (O-Ring, 4.5")
  • Assembly LC0231 (O-Ring, 4.5")

The Graco 104131 Packing O-Ring is an OEM sealing ring used in select spray equipment assemblies to maintain a reliable, leak-resistant seal under operating pressure.

Key Features

  • OEM fit—made to Graco specifications for assemblies that call out 104131.
  • Durable elastomer—commonly supplied in fluoroelastomer (FKM) for chemical and temperature resistance (verify against your fluid and manual).
  • Leak control—helps prevent air/fluid bypass that can reduce performance.

Specifications

Part Number 104131
Item Type Packing O-Ring (seal)
Typical Material Fluoroelastomer (FKM) — confirm against your application
Referenced Assemblies LC0111, LC0231 (O-Ring, 4.5")

When to Replace

  • Visible wear, nicks, flattening, or chemical swelling on the O-ring.
  • Air/fluid leakage, poor priming, or unstable pressure in the related assembly.
  • Any time the assembly calling for 104131 is disassembled for service.

Frequently Asked Questions

Open your equipment’s parts manual and navigate to the relevant pump/valve/assembly diagram. If the parts list calls out 104131 for that position (e.g., “PACKING, O-RING”), this is the correct replacement. If your manual references assemblies LC0111 or LC0231, verify their bill of materials for the O-ring callout.

Clean the groove and mating surfaces, lightly lubricate with a compatible grease, avoid twisting the O-ring during installation, and re-torque fasteners per the service manual. Replace if nicked or swollen.

Substitutions risk dimensional or material mismatch, leading to leaks or premature failure. For best results and warranty alignment, use the OEM-specified Graco 104131.

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