Name: Graco 102861 O-Ring Packing
Brand: Graco
SKU: 102861
Price: 99.25 USD
Availability: InStock

Graco 102861 O-Ring Packing

$99.25

In Stock

Part #: 102861

The Graco 102861 Packing O-Ring is a precision sealing component designed for durability and leak prevention in Graco spray and fluid-handling systems. Ideal for maintaining pressure integrity and preventing fluid leaks.

Part Number: 102861 (also known as 102-861)
Function: Creates a reliable seal in pump or manifold assemblies
Material: Commonly Viton® for chemical and solvent resistance
Used In: Monark Hydra-Clean 5:1 and various Graco industrial pumps

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Overview & Key Details

The Graco 102861 Packing O-Ring (also referenced as 102-861) is a sealing component used in select Graco fluid-handling and spray systems to help maintain pressure and prevent leaks around critical fluid path interfaces.

Compatible Machines

Graco Monark Hydra-Clean 5:1 pump assemblies (where 102861/102-861 appears in the parts list)
Selected Graco transfer / proportioning pumps that specify 102861 as an O-ring packing
Various industrial fluid-handling & spray models where the parts manual calls out 102861

Technical Details

Part Number	102861 (a.k.a. 102-861)
Type	O-Ring Packing — fluid seal
Typical Use	Seals in pump/manifold or other fluid-path interfaces to help maintain pressure and prevent leaks
Material (noted in some manuals)	Often listed as Viton® in certain assemblies; confirm against your model’s parts list
Also Note	Check equipment manual for exact location, size, and orientation during assembly

Product Description

The Graco 102861 Packing O-Ring is a precision seal used to support reliable operation in select Graco pumps and spray systems. A well-fitted O-Ring helps minimize bypass, supports consistent pressure, and reduces premature wear on surrounding parts. For the best result, inspect mating surfaces, lightly lubricate per the service manual, and torque hardware to specification during reassembly.

Fitment & Verification

Match the exact part number: 102861/102-861
Confirm the O-ring’s material and dimensions in your machine’s parts manual
Replace in sets when the service procedure recommends it (to maintain sealing integrity)
If your unit is older, cross-check by serial/revision in the official parts breakdown

Frequently Asked Questions

Check your model’s parts manual or exploded view and look for 102861 (or 102-861) in the bill of materials. If listed, it’s the correct replacement. Model-year and revision can affect fitment, so verify by serial when available.

Some assemblies list Viton®, but materials can vary by application. Always follow your manual’s specification to ensure chemical compatibility and service life.

Clean and inspect grooves and mating surfaces, replace worn components, use the lubricant specified in the service manual, and torque fasteners evenly. After reassembly, pressure-test per the manual to verify sealing.

Size alone isn’t sufficient—material, hardness, and chemical resistance matter. Use OEM-specified parts or proven equivalents that match material/durometer and are rated for your fluids and pressures.

Pressure loss, visible fluid weeping at the joint, cavitation, or inconsistent spray pattern can indicate a worn or damaged O-Ring. Inspect during scheduled maintenance or whenever you service the pump section.