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Old 07-26-2012, 09:47 PM   #1
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Graco Paintsprayer Question

So, New to this site, it looked like a great place to ask a couple quick questions. I just purchased a used Graco 1095 Ultramax II Premium Sprayer. I think its the 1st model, electric not Gas.

I have cleaned the gun added a new manifold filter. I also put some Thread Sealant Oil on the piston, however I couldn't find the "cup" everyone is talking about.

I have it working with water, and can spray with a 515 tip but the pump seems to run constantly. I have the PSI set for latex...about 2000. It will stop at 2000 but as soon as I spray it starts running to maintain pressure. When I run it without the tip at full PSI (in clean mode) I Can only get about 200 PSI. It will not maintain a hard spray like a water hose would from my house. It shoots water out a few feet but not 15 or 20 feet like a normal hose.

Is this normal? I want to try paint but wanted to make sure it is working correctly first. When I start running with a thicker liquid like latex will the pump maintain pressure for longer? Right now the pump seems to run/lose pressure almost immediately. My concern is that I may need to rebuild the pump and/or replace the motor. Is there a test I can perform?

I still have a few days and can exchange for the same model but with Gas not electric. The Gas 1095 was very large and I want to spray indoors as well as outside.

Hopefully someone has a similar unit and can explain what I should expect in terms of water pressure without the tip and can describe how long it should spray before the electric pump starts running to maintain pressure. With or without paint.

It also seems to "slow down" as it reaches the PSI setting, almost like the motor can't push the pump to the desired pressure. As soon as I start spraying it kicks on and runs at a constant pace.


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Old 07-27-2012, 12:03 AM   #2
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Everything you said is completely normal. Everything on an airless machine is controlled by the tip. You have to let the pressure build thru the hose. Once the pressure is built you will have your max psi. but if you dont have a tip on the gun you will loose the pressure built once you open the trigger. When you put the machine into latex paint with a tip on the gun you can hold the trigger down and a machine that size barely pumps to maintain pressure (in comparison to other smaller machines.) sprayers will constantly run though to maintain pressure. thats how its built. Watch a youtube video on the graco1095. pro's put up to 3 guns/hoses on them. its a beast in the painting world


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