I cannot get to the inside of my Ryobi Air Pump to replace the ..
My air pump is a Ryobi P730 18.0V MAX PSI: 150. I have removed the 9 screws that hold it together and I cannot get it to come apart so I can replace the tire inflation hose. What else do I need to do to take it apart?
Re: I cannot get to the inside of my Ryobi Air Pump to...
There is a tenth sdrew under the label on the back that has the model number on it...falls right open then..I am sure they do this so it voids the warranty as I tried very hard but label gets damaged when you peel it off...mine had a leak in the hose internally going to the digital presssure gauge...never flexes so it must be a defective part I wonder how many others have failed this way...will call them for a part tomorrow but I do not hold much hope
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If it's pumping up to 135 psi, shutting off and then restarts at the same pressure point since it was new, the pressure switch may have been set low at the factory. I don't know which model you have but most pressure switches have directions inside their cover as to how to adjust the cut-out and cut-in pressures. Be careful doing this, overpressuring the tank is dangerous. There is an adjustment screw or bolt that changes the pressure on the switch spring. Some pressure switches have two screws, one for cut-in and one for cut-out pressure. A few have one that adjust both pressures. If you do adjust the cut-in/cut-out levels, do it slowly and cycle the motor a couple times between each adjustment to see where it turns off and on. If the compressor is doing what you want it to, only pumping to 135 psi, it will live longer than if you adjust it up to 150 psi. Those last 15 psi of air are hard to get and will mean the motor will be running longer and more heat will be building up in the head.
The pressure regulator on an air compressor is designed to let the pump motor run until the pressure in the tanks reaches their safe level. While you are using the air the pressure drops in the tanks until it reaches the level where the pressure switch turns the motor on again and refills the tanks to their rated level. The pressure where these two things happen is usually with in ten psi above or below the rated levels because few regulators are so precise and are affected by temperature that they turn and off exactly at the rated pressures. If a pressure regulator is damaged or broken it is possible for the tank to either reach unsafe high levels or not turn on when the pressure drops to where it should restart the motor. If you are in doubt, have the regulator checked or replaced as overpressured tanks are very dangerous.
Your compressor was designed to produce 11.8 acfm at 90 psi turning neer max rpm (depending on pully combination between 800 ~1100 rpm ) with max pressure of 135psi. At 3600rpm the engine is producing max hp of 5 to 5.5. More power would not really produce more air without potentially destroying the compressor pump by over-reving. If your compressor is not functioning properly you will not get good air flow. Check instruction manual for time period to fill tank from empty. Could be 2 ~3 min. It is takes longer then problems. You can tell how your pump is doing by periodocally checking the length of time to fill tank. The next size range of gas compressor is about 8~9 hp with four cylinder pump and will deliver about 17 cfm.
adjust your pressure switch on your compressor .remove the cap and turn the screw clockwise to increase and counterclockwise decrease.turn the screw counterclockwise a bit and release some air till the compressor start pumping.then just before to reach 120 psi turn counterclockwise to stop the compressor at 120.then release some air again till it cuts in again and look at what pressure it will stop.keep going that way till you get your 120 psi.cut in should be around 90 psi(30 psi differential)depending what kind of pump you have (if the pump can handle 150 psi )you can adjust it to cut in at 120 and cut off at 150 and install a pressure regulator adjusted to 115 to 120 and get a nice steady pressure going to your nail gun.(the best way to do it!!!)
Model Number: SS3J5.5GH-WB Manufacturer: Ingersoll Rand Tank Size: 8 Gallons Engine Engine HP: 5.5 HP Engine Type: Honda GX 160 Fuel Tank: .8 Gallon Pump CFM @ 90 PSI: 11.8 Max Pressure: 135 PSI Certification: UL/CSA/ASME Overview Dimensions: 43" x 18" x 26" Product Weight: 175 lbs this can be a reference.