Graco 100084 Metallic Ball

The Graco 100084 Metallic Ball is a durable OEM check-valve component used in Graco hydraulic sprayers and LineLazer stripers. It ensures smooth fluid control and pressure stability in high-pressure systems.

Part Number: 100084
Type: Metallic check ball
Used In: GH 130 / 200 / 230 / 300, LineLazer III 200HS, LineLazer IV 250DC
Function: Maintains one-way hydraulic flow and prevents backflow
Material: Hardened steel for long service life

$13.1

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Description

Graco 100084 Metallic Ball — Overview & Compatibility

OEM Part: Graco 100084 | Description: Ball, Metallic (check-valve component used in specific Graco hydraulic/striping systems)

Compatible Machines

This part is used in the models below (and select related variants). Always verify with your unit’s parts manual before ordering.

Graco GH Series: GH 130, GH 200, GH 230, GH 300
LineLazer: LineLazer IV 250DC
LineLazer: LineLazer III 200HS
Monark: 23:1 Monark (selected configurations)

Key Details

OEM Part No.	100084
Item Name	Ball, Metallic (check-valve component)
Typical Assembly Location	Bypass/check valve path in the hydraulic reservoir or related valve body (model-dependent)
Primary Function	Seals against a seat to control directional fluid flow/pressure in the system
Material	Hardened metallic ball (OEM specification)
Dimensions	Not universally specified; use your model’s parts manual for exact fit
Sold As	Each (single piece)
Notes	Replace together with seat/spring/retainer if wear is present for best sealing

What’s Included

1 × Graco 100084 Metallic Ball

Installer Notes

Depressurize the sprayer fully and follow OEM safety procedures before service.
Inspect the seat/spring/retainer for wear, pitting, or contamination; replace if needed.
Clean all mating surfaces; a worn seat or debris will prevent proper sealing even with a new ball.
After installation, prime and test for pressure stability and backflow symptoms.

Common Companion Parts

Ball seat (model-specific)
Retainer or cage (model-specific)
Spring (model-specific)
O-rings/seals for the valve body (model-specific)

Frequently Asked Questions

Check your unit’s parts manual/diagram. If the bill of materials calls out 100084 (BALL, metallic) in the bypass/check assembly, it’s the correct part. Serial-range revisions can differ, so verify by model and serial number.

Typically within a check or bypass valve in the hydraulic reservoir or valve body (varies by model). It seats against a matching surface to control fluid direction/pressure during operation.

Pressure instability, difficulty holding pressure, or backflow during priming. Inspect the ball and seat for pitting/flat spots and check the spring and retainer for damage or contamination.

Generally no. 100084 Metallic Ball is commonly used in GH hydraulic and LineLazer assemblies (plus some Monark configs). Homeowner series often use different check components. Always confirm against your exact model diagram.

It’s good practice to inspect and replace the seat, spring, retainer, and related seals if wear is present. A worn seat will prevent proper sealing even with a new ball.