Graco 248979 Pump Cylinder Sleeve

The Graco 248979 Pump Cylinder Sleeve restores pump performance by replacing a worn or damaged cylinder liner inside the fluid section.

Replaces: Graco 240921
Fits: GMAX 7900, GH 200, EH 200, Mark X, LineLazer 200 HS
Function: Maintains sealing, pressure, and spray consistency
Material: Hardened steel with precision chrome finish

Retail Price: $499

You save: $130.74 (26.20%)

Our Price: $368.26

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Description

Graco 248979 Pump Cylinder Sleeve — Compatibility & Key Details

Compatible Machines

GMAX 7900 (gas models / pump platform)
GH 200 (gas-hydraulic)
EH 200 (electric-hydraulic)
Mark X / TexSpray Mark X
LineLazer 200 HS (stripers using the GMAX 7900 pump platform)

What this part does

The 248979 cylinder sleeve is the hardened, precision-bored liner inside the pump’s fluid section. Replacing a worn or scored sleeve restores sealing, pressure stability, and finish quality.

Quick Specs

Part Number	248979
Supersedes	240921 (check your manual/series)
Category	Fluid Section / Pump Cylinder Sleeve
Typical Use	Restore pump bore, pressure consistency, and service life on high-output Graco rigs
Notable Notes	Align the fluid-port notch correctly during install; inspect/replace packings if worn

When should you replace the sleeve?

Visible scoring or corrosion inside the cylinder bore
Unstable pressure, pulsation, or poor finish despite good packings
Excessive wear debris on removed packings/piston

Installation hints

Confirm your pump lower/fluid-section part number and unit series before ordering
Lightly lubricate components; keep all mating surfaces clean
Align sleeve port notch precisely; torque to spec per the service manual
Consider new packings/V-packs if previous sleeve was worn

Frequently Asked Questions

Yes—248979 is commonly listed as the replacement/supersession for 240921. Always verify against your unit’s series and pump lower in the manual or parts list.

It’s used across high-output platforms sharing the same pump geometry:GMAX 7900, GH 200, EH 200, Mark X (TexSpray), and **LineLazer 200 HS** (GMAX-based pump).

Not always, but it’s recommended to inspect packings. If the old sleeve was scored, plan on installing a new packing kit for best results.

Yes—align the sleeve’s fluid-port notch exactly as shown in your service manual to maintain correct flow and pressure.

Check your unit’s series and the pump lower/fluid-section part number in the OEM parts list. If it shows **248979** (or superseded **240921**), you’re good to go.