Graco 249177 Piston Valve Repair Q Kit
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$132.16
$147.50
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Graco 249177 Piston Valve Repair “Q” Kit restores performance to large Graco airless sprayers by renewing the piston valve section. Perfect for fixing loss of pressure or spray pulsation.
- Fits GH 200 / GH 230 / GH 300
- Fits GMAX II 7900 (Standard, ProContractor, IronMan)
- Compatible with Mark X and Ultra Max II 1895
- OEM-grade components for reliable sealing
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Genuine OEM Part
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Graco 249177 – Piston Valve Repair “Q” Kit: Overview & Compatibility
Compatible Machines
This Graco 249177 kit fits the following sprayers/pumps:
- GH 200 (multiple model variants)
- GH 230 (multiple model variants)
- GH 300 (multiple model variants)
- GMAX II 7900 – Standard / Lo-Boy (16W884), ProContractor (16W885), IronMan (16W887) and related 79xx assemblies
- Mark X series (selected models)
- Ultra Max II 1895 (selected models)
What is it?
The Graco 249177 Piston Valve Repair “Q” Kit is a factory repair set for the piston-valve section of heavy-duty Graco airless pumps. It restores proper sealing, check-valve function and pressure consistency without replacing the entire pump.
- OEM description: KIT, REPAIR, VALVE, PISTON
- Use when you have loss of pressure, hard priming, pulsing, or material blow-by past the piston valve.
Key Benefits
- Restores performance of the piston-valve check system
- Reduces downtime versus full pump replacement
- OEM fit & materials for long service life
What’s included
Contents vary by production run; typical items include:
- Piston-valve components (valve body/seat, plate)
- Springs and hardware
- Seals and O-rings for the valve section
Quick Specs
| Part Number | 249177 |
|---|---|
| OEM Description | KIT, REPAIR, VALVE, PISTON |
| Section Serviced | Piston / Lower Pump Check Valve |
| Typical Series | GH 200, GH 230, GH 300, GMAX II 7900, Mark X, Ultra Max II 1895 |
| When to Use | Pressure drop, difficult priming, leakage past piston, incomplete check-valve sealing |
Fitment Notes
- Verify by exact model and pump lower assembly in your parts manual.
- If the lower shows heavy wear (rod/cylinder scoring), consider a complete lower repair or pump kit.
- Flush and inspect mating surfaces before reassembly; torque fasteners to spec.
Frequently Asked Questions
| Question | Answer |
|---|---|
| Will 249177 fit my smaller Ultra Max II (e.g., 695/795)? | Generally no. The 249177 kit is used on larger frames like GH 200/230/300, GMAX II 7900, Mark X, and some Ultra Max II 1895 models. Check your manual’s valve-piston kit callout. |
| What symptoms point to a bad piston valve? | Loss of pressure, pulsing spray, slow/failed priming, or material bypass past the valve seat. |
| Do I need special tools? | Basic hand tools and a torque wrench are recommended. Follow Graco service procedures for your pump lower. |
| Should I replace packings at the same time? | It’s smart to inspect packings/rod and replace if worn to avoid repeat teardown. |
| How do I confirm compatibility? | Match your sprayer’s model/series and pump lower to the parts manual; if it lists 249177 for the piston-valve repair, you’re good to go. |
5
1 review
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M
Maria H.
Ordered the 249177 Piston Valve Repair Q Kit (249177) for our crew - installation took less than ten minutes. This is now our go-to for replacement parts.
