Every Titan Hydra is a gas-engine hydraulic airless sprayer: the engine drives a hydraulic pump, and a hydraulic motor strokes a piston fluid pump. Hydra X (4540 and 7230) is the current series. Hydra M 2000, M 4000 and Pro IV are older models whose parts and manuals remain available. The 7230 has the highest pressure; the M 2000 has the highest flow.
Four model names get called "a Hydra" on job sites, and they are not interchangeable when you order parts. The Hydra X 4540 and 7230 are the current series. The Hydra M 2000, Hydra M 4000 and Hydra Pro IV are older models. This guide sorts them out: what they have in common, where the numbers differ, which job each one points to, and which diagram section to open for each.
What every Titan Hydra has in common
All of them are gas-engine-driven hydraulic airless sprayers. A Honda engine drives a hydraulic pump, oil from that pump drives a hydraulic motor, and the motor strokes a piston-type fluid pump that moves the coating. The coating side and the oil side are separate, so a Hydra has two sets of parts to think about: the fluid pump on the coating side, and the hydraulic motor and oil on the drive side.
Titan's manuals say this drive gives the fluid pump a long, slow stroke, and Titan presents that as the reason the line suits thick coatings and several guns on one machine. That is Titan's description, and it matches the applications Titan lists: roofing, waterproofing, mastics, epoxies and large commercial or industrial jobs.
The hydraulic fluid is the one rule that holds across the whole line. Titan's Hydra X manual makes Coolflo mandatory and says not to use any other hydraulic fluid, and the Hydra M and Pro IV manuals call for Coolflo when the oil is changed. The change interval differs by series: twelve months on a Hydra X, six months on a Hydra M or Pro IV, so read your own manual. Coolflo is listed as 430-361 by the gallon and 430-362 by the quart.
Hydra X 4540 and 7230: the current series
Hydra X is the series Titan currently lists for its gas airless range. Both models have the same Honda GX390 engine with electric start and a low-oil alert, a 6 gal hydraulic reservoir, 12 in. pneumatic wheels and a 5 in. slow-stroking piston in the fluid section. Titan also describes an electronically controlled hydraulic system it calls HydraStroke, a Severe Service fluid section with a tri-chrome coating and self-adjusting packing, two cooling fans, and an electric AutoLift that raises and lowers the fluid section and motor without a transfer pump.
The two models differ in what the fluid section delivers. The 4540 runs at up to 4500 psi and 4.0 gpm and takes up to six guns. The 7230 runs at up to 7250 psi, takes up to five guns, and delivers less flow than the 4540; Titan's own pages give different figures for the 7230's flow, so we leave the number out. Titan's modular design lets one machine be converted to the other, and the site sells conversion kits 02424618 (4540 to 7230) and 2432905 (7230 to 4540).
Hydra M 2000, M 4000 and Pro IV: the older models
Titan's US gas airless listing shows only the Hydra X, but manuals and parts for the Hydra M and Pro IV are still available, and we do not call either one discontinued. Their model numbers are on the manual covers:
- M 2000: 433-860 and 433-861 (55 gal). Highest flow of the line at 6.0 gpm, with a pressure range of 500 to 2000 psi.
- M 4000: 433-800 (roofer), 433-801 (painter) and 433-802 (55 gal). 3.3 gpm, with a pressure range of 500 to 4000 psi.
- Pro IV: 433-820 and 433-821. 2.5 gpm, with a pressure range of 500 to 3300 psi.
Titan's Hydra M manual lists variable pressure control, large tungsten carbide valve seats with hardened stainless steel balls, self-adjusting packings, a hand-tight swivel foot valve, a large-capacity inline paint filter and a floating-ball pressure bleed valve. The Pro IV manual lists the same valve, packing and foot valve features. If your tag reads Hydra Pro Super, the site's engine-drive and tank pages are titled for the M and Pro Super together, but we do not give Pro Super specifications here.
Side-by-side: pressure, flow and tip size
Titan Hydra models compared
| Model | Max pressure | Max delivery | Largest tip, 1 gun | Largest tip, 2 guns |
|---|---|---|---|---|
| Hydra X 4540 | 4500 psi | 4.0 gpm | 0.067 in. | 0.043 in. |
| Hydra X 7230 | 7250 psi | Lower than the 4540 | Not given here | 0.035 in. |
| Hydra M 2000 | 2000 psi (500 to 2000 range) | 6.0 gpm | 0.075 in. | 0.053 in. |
| Hydra M 4000 | 4000 psi (500 to 4000 range) | 3.3 gpm | 0.060 in. | 0.040 in. |
| Hydra Pro IV | 3300 psi (500 to 3300 range) | 2.5 gpm | 0.050 in. | 0.035 in. |
Figures are from Titan's manuals and product pages, checked against dealer listings. Titan's sources disagree on the 7230's flow and larger tip sizes, so those are left out. Weights and engine horsepower are also left out because the manuals and dealer pages do not agree.
Two things stand out in that table. First, pressure and flow do not rise together: the line's highest pressure is on the 7230, and its highest flow is on the M 2000, which has the lowest pressure ceiling. Second, the tip limits track gun count. The 4540's limits drop from 0.043 in. with two guns to 0.035 in. with three, 0.031 in. with four and 0.029 in. with five, while the 7230 is limited to 0.021 in. with five guns. The M 4000 allows 0.035 in. with three guns and the Pro IV 0.029 in. with three. A bigger tip passes more material, and the pump's flow is shared between all the guns, so the allowed tip shrinks as guns are added.
Choosing a family by the job
The coatings below are the ones Titan or dealers quoting Titan literature name for each model. They are a starting point, not a promise that any coating will spray on any unit, so confirm the coating, tip and pressure against your manual and the coating maker's data sheet.
Where each model points
| If your work is... | Look at | Why |
|---|---|---|
| Asphalt emulsion or acrylic roof coatings | Hydra X 4540 | Titan names these for the 4540 and it takes up to six guns. |
| Hard-to-atomize materials such as silicone roof coatings | Hydra X 7230 | Titan names these for the 7230, which has the highest pressure in the line. |
| Ultra-heavy coatings on commercial, industrial or roofing jobs with several guns | Hydra M 2000 | Highest flow in the line at 6.0 gpm and the largest single-gun tip in the table above. |
| Heavy, viscous coatings, mastics, epoxies, elastomerics and waterproofing | Hydra M 4000 | Dealers quoting Titan list these, with a 4000 psi ceiling. |
| Architectural coatings, drywall mud, epoxies, mastics and elastomeric roof coatings | Hydra Pro IV | The lowest flow of the three older models, at 2.5 gpm. |
Where to find parts for each Hydra
Start at the Hydra series parts page, then open the diagram for your model. The fluid pump is the quickest way to tell which family you have, because each series has its own pump assembly and its own part numbers.
Fluid pump and motor diagrams by model
| Model | Fluid pump diagram | Motor or drive diagram |
|---|---|---|
| Hydra X 4540 | 4540 Fluid Section | Motor / Pump Assembly, shared with the 7230 |
| Hydra X 7230 | 7230 Fluid Section | Hydraulic System, shared with the 4540 |
| Hydra M 2000 | 315-555 Fluid Pump Assembly | 441-576 Hydraulic Motor, shared with the M 4000 |
| Hydra M 4000 | 245-555 Fluid Pump Assembly | 441-576 Hydraulic Motor Parts |
| Hydra Pro IV | 185-551 Fluid Pump Assembly | 441-574 Hydraulic Motor Parts |
The 4540 and 7230 have separate fluid section diagrams with different part numbers. Do not order a pump part from the wrong one.
A few parts do cross lines on the site. The Honda engine 980-340A is listed on the Hydra X Main Assembly I page and on the Hydra M and Pro Super engine-drive pages, and the bleed valve seat 945-906 appears on both the Hydra X bleed valve diagram and the Hydra M 2000 and M 4000 bleed valve diagrams. Treat that as a pointer to check, not a promise of fit: the diagram for your exact model is what settles it.
For the older models, the site lists major pump service kits including 245-500, 315-500 and 185-500, and catalog fitment for them reads "Hydra M and Hydra Pro series". That does not say which kit goes with which pump, so open your pump diagram first and call (713) 931-0006 with the model and serial number to confirm the kit.
The starting page for every Hydra diagram section.
Packing, glands, balls and seats for the 7230.
The fluid pump used on the Pro IV.
Manuals for pressure relief, fluid changes and troubleshooting.
Starting points for a Hydra: the Hydra X units, Coolflo, Piston Lube and a Hydra M major service kit.
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The Short Version
Identify the model on the tag first. Hydra X means the 4540 or 7230 diagrams, which differ in the fluid section. Hydra M 2000, M 4000 and Pro IV each have their own pump and motor diagrams. Use Coolflo in all of them, follow your own manual for intervals and pressure relief, and call (713) 931-0006 when the diagram does not settle it.
Not sure which Hydra you have?
Call (713) 931-0006 with the model number and serial number from the tag and our parts team will point you to the right diagram.
(713) 931-0006Order by Parts Diagram