Removed head and cyl. assembly, checked centrifagal switch, it's free, compresor and motor spin free.
To properly test capacitors requires a capacitor tester some multimeters do this. An indication of properly functioning capacitor can be checked with multimeter and checking ohms. The ohms on meters highest setting should show resistance for a couple seconds then go open. I'm curious to know amp draw when breaker trips and ohm out motor leads.
SOURCE: Starting problems
IF YOUR PRETTY SURE DRAW A CAPACITOR WIRING DIAGRAM AND THEN TAKE YOUR CAPACITORS TO ANY MOTOR SHOP OR SUPPLY HOUSE LIKE WW GRAINGER. THEY CAN CHECK THE MICROFARRADS OR UNIFARRADS OF YOUR CAPACITORS. YOUR START CAPACITORS HAVE THE LARGER MF OR UF RATING AND ARE TYPICALLY LARGER IN SIZE. YOUR P.O.S. INGERSOL RAND MAY EVEN BE A 3500 RPM MOTOR AND COULD HAVE UP TO 5 CAPACITORS. 3 OF WHICH ARE START. IS YOUR WIRE LARGE ENOUGH? IS YOUR BREAKER LARGE ENOUGH? IS YOUR COMPRESSOR UNLOADING THE HEAD PRESSURE WHEN IT CUTS OFF? IS IT OUTSIDE AND TOO COLD IN THE MORNINGS? MAKE SURE YOUR WIRING IS LARGE ENOUGH BECAUSE THAT IS USUALLY THE PROBLEM. YOU HAVE SINGLE PHASE BUT IS YOUR VOLTAGE CORRECT 208V OR 230 V. ALL WIRING AND GAUGING CHARTS ARE BASED ON 100 FT OF WIRE . MOST COMPRESSORS PULL 3 TIMES THE AMP RATING ON INITIAL STARTUP THEN COM DOWN TO AMPS LISTED ON THE MOTOR.
SOURCE: Electric Air compressor just hums then trips breaker.
usally there is a releaf valve that takes the pressure off the compressor while it is resting. If that pressure is not off when the drive piston starts the motor will overload and blow the the breaker or reset. Check for a releaf valve for when the unit has reached full pressure
SOURCE: my 5hp 22gal craftsman compressor wont go above 30lbs pressure
The piston cylinder has become gouged or the piston seal has folded. Go to a Sears parts place and ask for a replacement piston assembly for a 5HP. They sell for about $40 and take all of 15 minutes to install. Buy a torx set while you are there if you don't own one, as you will need one to replace the assembly.
You will be back at 120PSI in no time. Be sure to keep the intake filter in clean condition, as dirt is really bad for compressors.
SOURCE: i have sears craftsman 22gal 5 hp air compressor not enough press
hi buddy strip the end off the check valve out and inside is a rubber turn this rubber around and try this if it still downt work it sounds like the pressure switch faulty get back to me
Testimonial: "thanks i took out the check valve i see the rubber but the valve is 1 piece should i just get a new one"
SOURCE: Trips motor circuit breaker at start up (zero air
Most likely the start capacitor is defective or the motor has internal problems. would advise having it checked at a motor repair shop.
Testimonial: "Basic advice kept simple and to the point. I got a response quickly and did so without being forced to pay or trial software. Very Nice service. A+"
162 views
Usually answered in minutes!
×