If the MultiFinish 440 compressor will not start, Titan's manual lists the ON/OFF switch being off, a faulty switch or compressor, a tripped breaker, or a blocked or faulty pressure relief solenoid valve. If it starts but gives too little air, the manual points first to the air regulator being set too low.
Two systems, two checks
The MultiFinish 440 has two separate systems that can each fail. The pump side, the electric motor and drive that move the piston, supplies fluid pressure. The compressor side supplies the atomizing air for MultiFinish mode. Titan's manual describes the machine as able to spray in airless mode as well, and airless mode does not use the compressor. That gives you a quick sorting test: if the sprayer pumps and sprays in airless mode but fails in MultiFinish mode, the compressor and air side are the place to look. If nothing runs at all, start with the power supply and drive.
The cause lists below come from the troubleshooting page of Titan's manual as quoted in a search excerpt, so it is a single-source summary. Confirm every item in the full manual on our manuals page before you replace a part, and follow its safety steps before opening any cover.
Compressor does not start
The manual lists these causes for a compressor that will not start:
Compressor will not start: causes and the parts behind them
| Cause listed by Titan | What to do first | Part on the site |
|---|---|---|
| ON/OFF switch is off | Check the switch position | None needed |
| Faulty switch | Replace only after the manual's checks | 9850936 Power Switch |
| Tripped breaker | Reset it, and note if it trips again | 0524568 Circuit Breaker, Compressor Assembly page |
| Faulty compressor | Confirm with the manual before replacing | 0524543A Compressor |
| Blocked or faulty pressure relief solenoid valve | Check for a blockage before replacing | 0524544 Solenoid 120V |
Check the manual to confirm that the 120V solenoid on the compressor page is the pressure relief solenoid valve it describes. The site also lists a power cord assembly, 0524579, on the same page.
The free checks are the first two: the switch position and the breaker. A breaker that resets and then trips again is telling you something else is wrong, so do not keep resetting it.
Compressor runs but air is low
When the compressor starts but you do not get enough air, Titan's manual lists the air regulator being set too low. That is a setting, not a part, and it is the first thing to check. The manual also says to use the lowest pressure that atomizes the coating well, so set the regulator up gradually rather than all the way.
If the regulator is set correctly and air is still weak, the Compressor Assembly page lists the air-side parts to inspect. We cannot tell you which one is at fault from here, because the manual summary does not assign causes to them:
- 0524378 Filter Element, Compressor. Check it first, because it is the easiest to inspect.
- 0524571 Adjustable Relief Valve and 0551361 Relief Valve.
- 0524570 Gauge, which you read to see what the compressor is actually delivering.
- 0524581 4mm tube and 0524584 8mm tube. Look for kinks, splits or a loose push-in connection.
Poor atomization
The same manual page lists poor atomization with these causes: a tip that is worn or too large, air pressure set too low, insufficient fluid delivery, or material that is too viscous. The first is the easiest to test, because a worn tip widens the orifice, pressure falls and the pattern turns coarse or streaky. The GM 3600 gun parts are covered in our gun guide, and the tip is on the GM3600 reversible tip diagram page.
Pump drive parts
If the compressor is fine but the pump motor will not run or runs badly, the Drive Assembly page lists the parts of the motor and gear train. The manual summary we have does not give causes for the drive side, so this is a list of what exists, not a diagnosis:
- 805-272 Motor Brush Kit.
- 0558373A Motor Replacement Assembly.
- 0522018 Capacitor Assembly.
- 0508208 Slider Assembly and 704-173A Crankshaft/Gear Assembly.
The Main Assembly page also lists the control panel, the pressure control board and a potentiometer. Titan gives us no service intervals for any of these, so replace on evidence, not on a calendar.
Next step
Open the Compressor Assembly or Drive Assembly page, match the callout to your part, and add it to the cart. If you are not sure which part is at fault, call (713) 931-0006 with the model, serial number and what the sprayer does when you switch it on.
Compressor and drive parts for the MultiFinish 440:
The Short Version
Work from the easiest check outward: ON/OFF switch, breaker, regulator setting, tip. Then look at the compressor, solenoid, filter element and tubing on the air side, or the motor parts on the drive side. Confirm every cause in the manual first.
Not sure which part is failing?
Call (713) 931-0006 with your model, serial number and symptoms and our parts team will help you narrow it down before you order.
(713) 931-0006Order by Parts Diagram