Graco UltraMax II Mark V Pump & Parts Breakdown – Complete Guide
The Graco UltraMax II Mark V is the reliable workhorse in Graco's lineup of graco electric paint sprayer systems. Designed for professionals, it combines high-pressure capacity (up to 3,300 psi), robust frame construction, and easy serviceability. This breakdown dives deep into its pump assembly and related attachments to keep your sprayer performing flawlessly.
1. Pump Core & Repair Kits
At the heart of the UltraMax II Mark V lies a heavy-duty pump, replacement part 248204 for 695/795 units, and 287929 for 1095/Mark V models. The pump comprises key internal components such as piston rods (Part 241008), V-packing seals, piston glands, backup washers, fluid sleeves, and connecting rods
Graco pump repair kits—like the QuikPak Kit 17H839—offer comprehensive sets including V‑packing, bearings, O‑rings, and backup washers. Performing an annual pump rebuild helps prevent drops in pressure, fluid leaks, and costly breakdowns during usage
2. Fluid Path Components & Filters
To safeguard even coverage, these fluid components are essential:
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Intake tubes and grooved intake pins
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Filter housings with O-rings, diffusion tubes, and caps
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30–200 mesh filters, valve seats, piston balls, and drain valves
Keeping these filters clean is vital, especially when using airless paint sprayer attachments or working with additives and higher-viscosity coatings.
3. Drive, Motor & Frame Hardware
The system's structural reliability comes from:
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Drive housing and bearing housings (e.g., 240523, 287523)
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Electric motor, gears, deflectors, and thrust bearings
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Heavy brands: frame assembly, handle bars, pneumatic wheels, leg caps, and fasteners
These support the graco electric paint sprayer’s mobility, vibration resistance, and wear protection. Worn wheels or missing leg caps can make a big job much more difficult.
4. Control Box & Electrical Components
Though not covering the full control diagram, key electrical parts retain their importance:
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Control box, switch housings, terminal posts, potentiometers, rocker switches, grommets, and warning labels
These are crucial for intuitive pressure control and reliable sprayer operation when using graco airless paint sprayer applications.
5. Hoses, Spray Gun & Accessories
Your UltraMax II Mark V is supported by these vital components:
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Coupled hoses, drain hoses with grooved deflectors
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Strainers, quick‑disconnect fittings, and adapter nipples
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Spray gun compatibility with graco 395 airless paint sprayer accessories
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Graco spray tips like RAC X models & attachments like Blue Guard tip filters
These parts define coverage quality and enable versatility across finishes, textures, and nozzle sizes.
6. Minor Parts & Wearables
Smaller components often overlooked but imperative:
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Retaining clips, hex screws, washers, throttle clips
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O‑rings in the pump manifold and fluid housing
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Warning and control panel labels—each maintaining safety and compliance
Even tiny clips or missing O‑rings can impact sprayer functionality or compromise performance.
Maintenance & Rebuild Strategy
Here’s how to plan maintenance to maximize uptime:
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Pump Rebuild (annually or 1,000 hrs)
Replace Piston rod, V‑packing, backup washers, sleeve, and manifold O‑rings using graco pump repair kits. -
Filter Service (every 50 hours or per-job)
Rinse or replace filters (30–200 mesh), hoses, diffusion tubes, and strainers. -
Spray Gun & Tip Service
Swap out worn graco spray tips, purge gun filters, and check hose fittings. -
Frame & Electrical Check
Tighten bolts, inspect wheels and accessories, glaze out wiring harness grommets, inspect switches.
Matching Accessories & Compatibility
What elevates the UltraMax II Mark V is its compatibility across other Graco tools:
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Works seamlessly with the graco 395 airless paint sprayer and Magnum/Mark series attachments
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Accepts airless paint sprayer attachments like Blue Guard, JetRoller, and Contractor PC gun upgrades
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Flow control, tips, and hoses are often interchangeable between Mark V and Magnum/X5.
Especially useful when pairing with graco electric paint sprayer systems in fleets—it allows shared parts stock and reduces complexity.
Troubleshooting & When to Replace
| Symptom | Likely Cause | Recommended Repair Item |
|---|---|---|
| Low or fluctuating pressure | Worn packings / seals | Pump kit (e.g., QuikPak or sleeve kit 248209) |
| Leaking fluid | Damaged manifold O‑rings or sleeves | Sleeve kit #248209, manifold packing (108526) |
| Pulsing spray stream | Defective valves or return hose leaks | Valve rebuild kits, drain hose replacement |
| Motor overheating or whining | Worn gears / thrust washers | Drive housing inspection, gear kit replacement |
| Erratic gun spray staining | Contaminated fluid/filter failure | Replace filters, strainers, tip filters |
Proactively handling these signs can save both time and paint.
Ordering & OEM Parts Support
To maintain accuracy and performance:
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Refer to the official graco parts list or exploded diagrams (e.g., Figs. 311362A)
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Cross‑reference part numbers exactly—e.g., 287929 pump, 248209 sleeve, 108526 manifold O‑ring.
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Add graco pump repair kits, hoses, and graco spray tips to cart with OEM precision.
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Include airless paint sprayer attachments like tip filters or roller kits for extended versatility.
Standalone parts ordering ensures proper fit and safeguards warranty integrity.
The Value of OEM Parts
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Exact fit & performance matched to Graco’s original machining specs
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Built to handle up to 3,300 psi, especially under heavy loads
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Simplified inventory with compatibility across Mark, Magnum, and Ultra lines
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Warranty compliance, since aftermarket parts may void coverage
OEM components keep your graco airless paint sprayer, along with airless paint sprayer attachments, operating at peak efficiency across years of jobsite use.
Final Summary
The Graco UltraMax II Mark V is a top-tier, graco electric paint sprayer demanding precise maintenance. This detailed breakdown ensures:
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Full pump rebuild use via OEM graco pump repair kits
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Clean fluid path with filters, strainers, and hoses
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Seamlessness with graco 395 airless paint sprayer and other systems
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Sharp, consistent finishes using graco spray tips and control accessories
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Easy order-up from the OEM graco parts list to eliminate guesswork
Choose genuine parts, perform upkeep strategically, and your Mark V will prove a dependable partner in delivering pro‑grade finishes—project after project.
Keep your UltraMax II Mark V ready for any challenge: use OEM replacements, adhere to service intervals, and order parts before any issues show. That’s the pro way to get the best performance—always.