The GM 3600 is Titan's air-assisted airless spray gun, supplied with the MultiFinish 440 and also used on the AirCoat. It comes in a reversible tip version (2404548) and a flat tip version (2412194). Its 3600 psi rating is above the MultiFinish 440's 3300 psi, so the system's lower figure governs.
What the GM 3600 is
The GM 3600 is an air-assisted airless gun. It takes coating from the pump hose and a separate supply of atomizing air, and sprays through a small-orifice tip. That combination is what gives the MultiFinish 440 its fine finish mode. Older listings and our own old blog post sometimes wrote the name as GM 360 or GM3600; the correct name is GM 3600, and the figure refers to its maximum pressure rating.
Dealer listings describe the gun as having stainless steel fluid passages, a two-stage trigger, an in-line filter, a quick disconnect on the air inlet, a 1/4 MNPT fluid inlet and a reversible tip system, with an optional flat tip version. The maximum pressure is given as 3600 psi by two dealers. The same gun is used on the Titan AirCoat, which is mentioned here only so you know the parts cross over.
Reversible tip or flat tip
Two versions are in the catalog, and the choice comes down to the tip system:
GM 3600 versions on the site
| Version | Part number | Tip | Diagram page |
|---|---|---|---|
| Reversible tip | 2404548 (replaces 0524357) | 695-415 Reversible Tip | GM3600 Reversible Tip Spray Gun |
| Flat tip | 2412194 (replaces 0524358) | 0526209 AirCoat Tip ACF 9/20 | GM3600 Flat Tip Spray Gun |
The flat tip version is sold with a 9/20 Brilliant tip. The two diagram pages share most parts and differ at the tip and the seal.
A reversible tip can clear a clog: you rotate the tip handle as the tip's instructions describe. Follow the manual for the exact steps, and keep the gun's trigger lock engaged and your hands clear of the tip while you do it. The flat tip version is sold with its own tip and tip guard instead. If you are unsure which version you own, call (713) 931-0006 and we will help identify it.
Pressures to respect
The gun is rated higher than the pump it usually runs on. The MultiFinish 440 tops out at 3300 psi, and the gun's rating is 3600 psi. Every component in a system is limited by the lowest rating in it, so on a MultiFinish the working ceiling is 3300 psi, not the gun's number. Titan's manual also says every replacement tip, guard, gun, extension, fitting and hose must be rated at least 3300 psi.
The figures below come from a single search excerpt of the Titan manual, so treat them as a guide and confirm them in your own manual on our manuals page:
- Maximum air input pressure to the gun: 115 psi.
- Atomizing air: 7 to 32 psi.
- Recommended fluid pressure: 400 to 1800 psi.
Those fluid pressures are well below the pump's maximum, which fits Titan's advice for the MultiFinish mode: use the lowest pressure that atomizes the coating well.
What wears on the gun
GM 3600 wear and service parts
Symptom to part
Common gun symptoms and where to look
| Symptom | Check first | Then |
|---|---|---|
| Spitting or pulsing | Gun filter 0089959 and filter body 0394610 | Pump filters and valves, which are on the pump diagrams |
| Coarse or streaky pattern | Tip wear | Replace the tip; Titan lists a worn or oversized tip as a cause of poor atomization |
| Little or no atomizing air | Air regulator setting on the sprayer | QD nipple 0508422 and air valve assembly 0524278 |
| Leaking at a joint | Tightness of the fitting | Seals, sealing washer and O-rings listed above |
Use your Titan manual for the troubleshooting steps and always relieve pressure before you open the gun.
Choosing a diagram
Look at the tip on your gun. If it is a reversible tip handle, open the reversible tip diagram; if it is a flat tip guard with a 9/20 tip, open the flat tip diagram. The pump-side parts are on the MultiFinish 440 spray system and fluid section pages instead. If the callout does not settle it, call (713) 931-0006 with the sprayer model and serial number.
GM 3600 guns and gun parts on the site:
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The Short Version
The GM 3600 is the air-assisted airless gun on the MultiFinish 440, in a reversible tip version and a flat tip version. Keep every replacement rated for at least the pump's 3300 psi, clean the gun filter after each job, and replace a worn tip before you chase other causes.
Not sure which GM 3600 version you have?
Call (713) 931-0006 with your sprayer model and serial number and our parts team will confirm the gun and parts before you order.
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