Graco 249139 Pump Cylinder Repair Kit

The Graco 249139 Pump Cylinder Repair Kit is an OEM replacement that restores pressure and performance in 7900-series sprayers. Ideal for maintenance of high-output pumps.

Fits GMAX II 7900 and TexSpray 7900 HD
Replaces worn or damaged pump cylinder
Ensures consistent spray pressure and longer pump life
Compatible with pump model 249122

$471.7

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Description

Overview: Graco 249139 Pump Cylinder Repair Kit

Compatible Machines

This pump cylinder repair kit is designed for select large-frame Graco sprayers that use the associated 7900-series fluid section.

Graco GMAX II 7900 (Hi-Boy / Lo-Boy configurations)
Graco TexSpray 7900 HD
Pump Model: 249122 (as used on the above 7900-series units)

What is it?

The Graco 249139 Pump Cylinder Repair Kit (often called a “cylinder kit”) restores the fluid section of the pump by replacing the worn cylinder component(s) so your sprayer can maintain pressure, output, and long service life. It is an OEM kit engineered to factory tolerances for reliability and performance.

Key Benefits

OEM fit & finish for the 7900-series fluid section.
Restores performance if you notice loss of pressure, scoring, or leakage from the fluid section.
Long-lasting materials designed to handle high-duty professional use.
Serviceable design reduces downtime and total cost of ownership.

Tech Data & Compatibility Notes

Part Number	249139
Item Type	Pump Cylinder Repair Kit (fluid section component)
Primary Fit	GMAX II 7900, TexSpray 7900 HD (verify pump model 249122)
Typical Symptoms	Pressure drop, excessive wear/scoring, fluid leaks, inconsistent spray pattern
Installation Guidance	Follow Graco service manual for your exact pump; clean components, torque to spec, prime and pressure-test after reassembly
Genuine OEM	Yes — maintains performance and compatibility

Pro Tips for Best Results

Inspect the piston rod and packings when replacing the cylinder; replace worn parts together to extend service intervals.
Flush thoroughly with the correct solvent and use pump armor or storage fluid when the sprayer is idle.
After reassembly, prime slowly and check for leaks before operating at full pressure.

Frequently Asked Questions

Check the pump tag or parts manual for your exact pump model. This kit is associated with pump model 249122, used on many GMAX II 7900 and TexSpray 7900 HD units. If your pump model differs, review the factory parts list to confirm the correct cylinder kit.

A cylinder kit addresses the fluid section’s cylinder (the bore the piston runs in). A packing kit replaces the seal stack that keeps paint from bypassing the piston/rod. They solve related but different wear issues and are often serviced together for best results.

No specialized tools are typically required beyond standard hand tools; however, follow the Graco service manual for safe disassembly, correct torque, and re-priming procedures. Replace worn mating parts (like the piston/rod) if inspection shows damage.

Loss of pressure, inconsistent spray pattern, metallic scoring on the piston/rod, or persistent leaks from the fluid section are common indicators. If present, a cylinder kit like 249139 can restore performance when paired with good maintenance.

Flush debris, prime at low pressure with the correct fluid, then increase pressure gradually while checking for leaks. Verify a uniform fan pattern with the right spray tip and clean filters before starting production work.