Graco 287551 Pump Cylinder Repair Kit

The Graco 287551 Pump Cylinder Repair Kit is a genuine OEM rebuild kit designed to restore pump performance and fix pressure loss caused by worn cylinder components.

OEM Part: 287551
Fits: GMax II 3900, RentalPro 360G
Purpose: Restores pressure and eliminates leakage
Includes: Cylinder and sealing components (varies by model)
Ensures: Reliable performance and longer pump life

Retail Price: $419

You save: $109.78 (26.20%)

Our Price: $309.22

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Description

Precision Rebuild for Graco Airless Pumps – 287551 Kit

Compatible Machines

Graco GMax II 3900
Graco RentalPro 360G

What is the Graco 287551 Pump Cylinder Repair Kit?

The Graco 287551 Pump Cylinder Repair Kit (also listed as Cylinder Repair Q Kit) is a genuine Graco service kit designed to restore the cylinder sealing surfaces and related wear components in select Graco airless pumps. Rebuilding with OEM parts helps recover prime/pressure, reduce leaks, and extend pump life.

At-a-Glance Specs

OEM Part	287551
Kit Type	Pump Cylinder Repair Kit (OEM)
Fits	GMax II 3900, RentalPro 360G (verify series)
Purpose	Restore cylinder sealing/efficiency; address pressure loss and leakage due to wear
Contents	OEM cylinder-related components (contents may vary by production; confirm in manual)

Key Benefits

Restores consistent pressure and spray pattern
Reduces leakage and premature wear
Maintains OEM performance and reliability
Supports longer service intervals when used with proper cleaning/filtration

Installation & Service Notes

Follow the model-specific Graco service manual; perform full pressure relief before disassembly
Inspect cylinder bore/rod for nicks or scoring; replace damaged hard parts
Clean all parts thoroughly; assemble with recommended lubricants
Prime and test at low pressure; check for leaks and proper operation before full duty

Also Known As

May be listed as: Kit, Repair, Cylinder or Cylinder Repair Q Kit.

Frequently Asked Questions

Match your sprayer’s exact model/series and serial number in the Graco parts manual. If your unit has been upgraded with a different pump, verify by current pump assembly part number as well.

Difficult priming, loss of pressure, pulsation, visible fluid bypass, or frequent packings wear can indicate cylinder wear. Inspect components before reuse.

No. It targets cylinder-related service items. Some pumps may require additional parts (e.g., ball checks, rods, packings) depending on inspection. Refer to your model’s BOM.

Yes—if you’re familiar with Graco service procedures and safety. Otherwise, use an authorized service center. Improper assembly can cause damage or injury.

Use correct filtration and tip size, flush promptly after use, store with pump conditioner if recommended, and follow the maintenance intervals in your manual.