Question about Hitachi EC2510E 5.5hp Gas Air Compressor

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Motor will not crank when air is in tank. - Hitachi EC2510E 5.5hp Gas Air Compressor

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If *** is having problems charging the air then you have a bypass valve that is defective, it's between the compressor pressure line and tanks, if air is allowed to go to the compressor head it will not run or if it does it will burn up. A lot of times you can remove the valve and lightly clean it and it will work. That's called back pressure valve.

Posted on Nov 14, 2009

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You are supposed to use the unloader valve to start. when air is in tank the starter motor is not only turning the motor but also trying to compress air. this very hard on the whole unit. the unloader valve should have what looks like a loose lever. lift the lever and it pulls the attached rod. after motor starts and runs put back to rest position

Posted on Nov 14, 2009

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Posted on Jan 02, 2017

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My car will turn over but will not start it just shut off on me and wont turn over enough to crank back ip Any suggestions on what the problem is it is a 2005 ford taurus


Remove the gas-cap, to let some air into the gas tank, to break the "vacuum" inside the tank. Then, the fuel-injection pump will be able to suck gasoline -- working against "normal" air-pressure, instead of working against a vacuum. Then, gasoline will reach the motor, and it will start.



Happens to me after using about 2 gallons of gasoline a while after filling-up the tank on my 2002 Taurus SLE. Letting air into the gas-tank works every time.

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Craftsman Air Comp. 6 hp oil-less, 33 gal horz. tank - sounds really loud


Sources of noise from craftsman oil free compressors (could be Made by Campbell Hausfeld or Porter Cable) include loose fan, failing bearing/s on the piston rod and housing, failing seal ring on piston, air filter intake and loose motor mounts. With the housing cover off, check the fan blade for cracks or loose screw. Turn motor by hand till the piston is at top of stroke. Examine the cylinder for scratches close to top. If scratched, air is leaking past vinyl ring making noise and causing longer fill time. If everything looks ok, suspect noise coming from bearings. Hard to tell if bearings are failing by looking at them. I have seen many failures of the piston bearing on the crank (fairly easy to change, I use alternator bearing from auto parts ) , however, the bearing in the housing just behind the crank bearing is much harder to replacable. Good luck with your fix-it project.

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2009 chevy aveo ran out of gas now it wont crank


No crank to a mechanic means the starter motor doesn't spin the engine over, is this what you mean? Or do you mean the engine cranks over but will not fire up and run? If it is the latter have you added at least 3 gallons of gas to the tank to make sure the electric fuel pump inside the tank can properly prime? If not do that, also you can spray starting fluid into the engine engine air intake pipe after adding the 3 gallons and see if that gets it going. If it still will not start you have burned up the fuel pump and you will need to drop the fuel tank and replace the pump, remember the pump is cooled and lubricated by the gasoline it runs in, so when you run low on fuel or out you can very quickly severely damage the small electric fuel pump. Never let the gas gauge level go below 1/8 tank to prevent premature fuel pump failure.

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I have a 5 HP Coleman air compressor. I was using it to provide air to my plasma cutter which requires 60 psi to operate. Basically, air compressor's motor keeps running, but it's stopped creating air...


You did not list model number, however if you have oilless type check the cylinder/piston by manually turning crank until piston is at top and examine cylinder for wear or scratches. If worn replace cylinder kit for full pressure. If ok check reed valves /valve plate for wear or broken reeds. If oil bath type, problem is usually air leak or reed valves / valve plate. As a general rule, you can keep track of wear by noting how many minutes it takes to fill the tank to cut-out. As the compressor wears it will take increasingly longer to fill. When new, and depending on tank size/ hp, most compessors fill within 2 ~ 5 min. Good luck

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poss fuel pump going bad locate fuel tank under the car have some one hit the gas tank under the tank while some one is cranking over the motor if it starts then fuel pump is bad

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The air tanks fill with air, but the pressure


The regulator sounds like it is cranked closed. Try slowly operating the adjusting knob in the opposite direction. As the valve moves, you should see the pressure rise on your gauge (it probably does work).
Hope this helps....now go make something!
Best regards, --W/D--

Jul 18, 2009 | Hitachi EC12 Portable Electric 2hp Air...

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