The Impact 840 is the larger of the two: 1.00 gpm against 0.80 gpm, a 0.032" maximum tip against 0.029", a 2.3 hp motor against 2.0 hp, and Titan's 200-300 gallons per week against 150-200. Both reach 3300 psi. Their diagrams share many fluid section and drive parts, but the motor controllers and the upright carts differ, so order from the page that matches your model.
The numbers side by side
Both are electric piston-pump airless sprayers from Titan's original Impact line, and both reach the same maximum pressure. What separates them is how much paint they move and how large a tip they can carry. Titan's weekly volume guide puts the 740 at 150-200 gallons and the 840 at 200-300 gallons, so the 840 is aimed at heavier use.
Impact 740 vs Impact 840
| Spec | Impact 740 | Impact 840 |
|---|---|---|
| Max delivery | 0.80 gpm | 1.00 gpm |
| Max tip, one gun | 0.029" | 0.032" |
| Max tip, two guns | Not listed | 0.021" |
| Max pressure | 3300 psi | 3300 psi |
| Motor | 2.0 hp brushless DC | 2.3 hp brushless |
| Titan weekly volume | 150-200 gallons | 200-300 gallons |
Two-gun operation is listed for the 840 only. Weights for these models are not given here because published figures conflict.
Tip size is where the difference shows up on the job. A larger tip delivers more paint, and thicker coatings generally need larger orifices, so if your work leans on heavier materials or longer runs of wall, the 840's extra capacity gives you headroom. If you spray lighter coatings on mid-size jobs, the 740 does the work with a smaller sprayer.
What Titan lists for each
Titan lists much of the same technology on both. For the 740 and the 840 it lists Quad+ Packings, which it describes as self-adjusting, a PermaLife Cylinder that Titan says never needs replacing, and an AutoOiler that pushes oil from a reservoir to the packings. The PermaLife cylinder is only the cylinder: packings, seats, balls and the piston rod still wear on both.
Titan describes the 740 for larger residential and commercial projects, and the 840 for stains, lacquers, enamels, latex and block fillers on medium to large residential, commercial and industrial jobs. The 740 ships with an RX-Pro gun, a 517 tip and 50 feet of 1/4" airless hose, and Titan lists a hose wrap on it for up to 150 feet of hose.
One more difference is on Titan's side of the catalog. The Impact IntelliSync series lists 640I/IA, 840I/IA and 1140I/IA, so an IntelliSync version exists for the 840 but not for the 740. IntelliSync is the Bluetooth link to the MyTitan app; if you want it, the 840 is the one that has it.
Why the diagrams are combined
Open the site's diagram list and you will find pages named "Impact 740/840" next to pages for the 740 and the 840 on their own. The combined pages are the ones where the diagram and fitment notes list parts against both models. They cover the main parts of the sprayer:
- Fluid Section Assembly (P/N 805-1010)
- Drive Assembly
- Main Assembly
- Filter Assembly (P/N 805-269)
- Low Rider Cart (P/N 805-289), Low Rider Siphon Assembly (P/N 805-296) and Upright Cart Assembly (P/N 805-227)
Each model also has its own set of pages, and those are where the differences live. The 740's separate Fluid Section page lists 24 parts and the 840's lists 26, so do not assume the two lists match line for line. When both a combined page and a model page exist, the model page is the safer one to order from.
Parts both diagrams list
Many pump and drive parts carry the same number on the 740 and 840 pages. The diagram lists the same part number on both models; that is the evidence we go by, and we do not call parts interchangeable on that basis alone.
Parts listed on both the 740 and 840 diagrams
The outlet seal 800-348 and the Viton O-ring 800-332 also sit on both fluid sections. Ask about them when you order packings, since they are small parts that are easy to leave off the list.
Parts that differ
Two groups are not shared, and they are the ones most often ordered wrong from a combined page.
Where the 740 and 840 pages differ
| Item | Impact 740 | Impact 840 |
|---|---|---|
| Motor controller | 805-839 | 805-840 |
| Upright cart assembly page | P/N 0552524A | P/N 0552537A |
The 840 upright cart page also lists a 0552538A cart, shown with fitment for the 840, 840I and 840IA.
Deciding between them
- Choose on gallons per week and tip size: the 840 for the larger numbers, the 740 for mid-volume work.
- If you want Bluetooth and the MyTitan app, the 840 has IntelliSync versions in Titan's lineup and the 740 does not.
- For parts, the shared diagrams save you time, but the controller and the cart are where the two part ways.
- If you are not sure which sprayer you have, call (713) 931-0006 with the model and serial number.
Parts the 740 and 840 diagrams have in common, plus the model-specific controllers and a 740 frame:
−8%
−17%
The short version
The 840 is the heavier-duty sprayer, with 1.00 gpm and a 0.032" tip against the 740's 0.80 gpm and 0.029". The two share a lot of pump and drive part numbers, but the motor controllers and upright carts are model-specific. Use the model's own page when a part looks the same.
Not sure which page matches your sprayer?
Call (713) 931-0006 with your model and serial number and our parts team will confirm the part before you order.
(713) 931-0006Order by Parts Diagram