Graco 243346 Pump Cylinder Repair Kit

Graco 243346 Pump Cylinder Repair Kit restores pump performance by replacing the worn cylinder in your sprayer’s fluid section. Ideal for maintaining consistent pressure and spray quality.

OEM-quality cylinder for reliable sealing and long service life
Fits Ultra Max II 695, Ultra Max II 795, GMax 3900, and LineLazer IV 3900
Prevents pressure loss, leakage, and uneven spray patterns
Recommended for regular maintenance or performance restoration

Retail Price: $357

You save: $93.53 (26.20%)

Our Price: $263.47

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Description

Overview, Compatibility & Key Details

Compatible Machines

This OEM cylinder kit is used across select professional Graco airless sprayers. Confirm by model and serial in your parts manual.

Graco Ultra Max II 695
Graco Ultra Max II 795
Graco GMax 3900
Graco LineLazer IV 3900

What this part is

The Graco 243346 Pump Cylinder Repair Kit replaces the wear cylinder within the pump’s fluid section. Restoring a true, smooth bore helps your piston seal correctly, recover consistent pressure, and reduce pulsation or leakage—bringing your sprayer back to dependable daily performance.

Quick Facts

Part Number	243346 (OEM Graco)
Category	Fluid Section — Pump Cylinder / Sleeve
Primary Function	Restore sealing surface for the piston/packings to maintain pressure and output.
Typical Symptoms When Needed	Pressure drop, surging, excessive leakage, frequent packing wear, poor atomization.
Notes	Contents may vary by revision/vendor listing; check “What’s Included” on your manual or invoice.

Why replace the cylinder?

Worn cylinders score the packings and cause rapid failures.
Fresh bore & correct tolerances restore even pressure and smoother piston travel.
Improves finish quality by stabilizing spray fan and reducing pulsation.

Basic installation notes

Depressurize and flush sprayer per Graco safety procedures.
Disassemble the lower fluid section; inspect piston rod, seats/balls, and packings.
Install the 243346 cylinder per torque and sequence in your model’s service manual.
Prime with compatible fluid; check for leaks and verify pressure stability.

Frequently Asked Questions

Check your sprayer’s model and serial against the parts breakdown in the official Graco manual. This kit is commonly used on Ultra Max II 695, Ultra Max II 795, GMax 3900, and LineLazer IV 3900, but always confirm with the manual for your serial range.

Inspect the piston rod, packings, checks (seats/balls), and O-rings. If the bore was worn, packings usually are too. Replacing these together reduces repeat tear-downs and helps the repair last longer.

No specialty tools are usually required beyond standard hand tools and torque specs from the service manual. Cleanliness is critical—any debris can score the new cylinder and packings.

OEM parts ensure correct tolerances and finish for long packing life. Quality aftermarket options exist, but if uptime and finish quality are critical, OEM is the safe choice.

Use correct filters/tips, strain coatings, avoid dry-running, flush promptly after use, and store with pump armor or compatible protectant. These steps reduce abrasion and corrosion in the fluid section.