Hydra M4000

Hydra M 4000 Pump, Fluid Section & Pressure Control Parts

The Hydra M 4000 is a top-tier hydraulic airless sprayer built for heavy-duty, high-volume, industrial, and commercial coating work. As part of the “Hydra” line, it uses a powerful gas engine and a robust hydraulic piston-pump system engineered to crush through the toughest, most viscous coatings, mastics, epoxies, elastomerics, roof coatings, waterproofing compounds, and other heavy coatings that standard sprayers can’t handle efficiently. 

Thanks to its ultra-slow-stroking hydraulic drive, severe-service pump components, and high maximum pressure, the Hydra M 4000 delivers consistent flow and atomization even under continuous heavy-duty operation. Whether used with a siphon hose, remote drum feed, or multiple-gun setup, it’s designed for reliability, longevity, and maximum productivity, a true “workhorse” for contractors, roofers, and industrial painters. 

 Key Features

• High-pressure hydraulic piston pump — up to 4000 PSI: Hydra M 4000 produces enough pressure to spray extremely viscous coatings and deliver consistent spray through long hoses or multiple guns. 
• Flow rate up to 3.3 GPM: Allows rapid coverage and high throughput even with heavy-bodied materials.
• Support for multiple guns / large tip sizes: Compatible with tip sizes up to 0.060″ for one gun; for 2–5 guns tip sizes scale down appropriately (e.g., 0.040", 0.035", 0.029", 0.025"). 
• Ultra-slow-stroking hydraulic drive for pump longevity: The hydraulic system strokes slowly to minimize wear and extend the life of fluid sections even under heavy-duty use. 
• Heavy-duty pump construction: Severe-service hard-chrome piston and cylinder for extra durability, plus spring-loaded self-adjusting UHMWPE packing that resists wear and avoids premature packing damage from over-tightening. 
• Flexible feed options: Can be used with a siphon hose or, for high-volume jobs, a remote 55-gallon drum feed for continuous use. 
• Ease of maintenance: Hand-tight cylinder and foot valve design allows relatively quick service and maintenance in the field when compared to more complex systems. 
• Industrial-class build for severe jobs: Designed specifically for ultra-heavy coatings, roofing, waterproofing, epoxies, mastics, not just architectural paints, making it ideal for demanding commercial/industrial applications. 
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Applications

The Hydra M 4000 is best suited for:

• Commercial & Industrial Coating Projects: Warehouses, factories, storage tanks, steel structures, water tanks, bridges and any large-scale coating work.
• Roofing, Waterproofing & Elastomeric Coatings: Roof membranes, waterproof coatings, elastomeric barrier coatings, and other heavy sealants or protective coatings. 
• High-Viscosity & Specialty Materials: Mastics, epoxies, heavy elastomerics, floor coatings, foundation coatings — coatings that typical sprayers struggle to atomize. 
• Large Surface Area & High-Production Work: Jobs requiring high output, multiple guns, long hose runs, or continuous operation (e.g., commercial building exteriors, large tanks, industrial floors). 
• Infrastructure & Heavy Construction Projects: Bridges, foundations, concrete or steel structures, water tanks especially where tough protective coatings are needed. 

FAQ’s

1. When should I consider rebuilding or replacing the fluid pump or packing system on my Hydra M 4000?

If you notice reduced flow, loss of pressure, pulsation, or difficulty priming, these are typical signs that the pistons, seals, or packing are worn. Because Hydra units are used for heavy coatings, wear of internal components over time is expected. Regular inspection of pistons, cylinders, packing, valves, and suction components is important. If cleaning and servicing don’t restore proper performance, rebuild or replacement is likely necessary.

2. What causes overheating or hydraulic system stress? How can I avoid damaging the sprayer?

Overheating often stems from extreme load, e.g., overly viscous coatings, long continuous use without rest, or insufficient cooling airflow. To minimize stress: use recommended coatings (or thin heavy coatings as per manufacturer instructions), allow cooldown periods during long jobs, maintain clean hydraulic fluid (if serviceable), and avoid overworking the motor pump beyond intended duty cycles. Also, ensure adequate ventilation around the unit.

3. Can the Hydra M 4000 handle multiple spray guns simultaneously?

Yes, the Hydra M 4000 supports multiple guns. The specification shows tip sizes for up to 5 guns (with progressively smaller tip sizes per gun).

4. What parts are included in the outlet manifold for Hydra M / Hydra Pro Super?

 The outlet manifold filter assembly typically includes a filter cap assembly, a stainless ball check, a 50-mesh screen filter, PTFE gaskets (thick and thin), a filter body rated for up to 5000 psi, a hex nipple, pipe plugs, and a swivel fitting for hose/gun connections

5. Why is it important to clean the outlet filter, and how often should I do it?

Cleaning the filter regularly is important because a dirty or clogged filter can reduce filtering effectiveness, causing poor spray patterns, clogged spray tips, or other performance issues.  You should relieve system pressure first, then remove the filter cap, pull out the filter element (with check ball), clean the filter body and screen thoroughly with a suitable solvent, and inspect for damage before reinstalling.