Question about Coleman 3HP 11 Gallon Oil Lube, Direct Drive Horizontal Air Compressor

1 Answer

Trips breaker starting under load

Runs from empty to full, when pressure drops to start pressure breaker trips

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Coleman Master
  • 1,400 Answers

The problem that you describe is caused by pressure in the airline due to faulty in-tank check valve and/ or the unloader at the pressure switch. When the compressor cycles off the pressure switch releases the air that remains in the air line thru a small valve. There is a 1/4 " tube extending from the check valve to the switch. Listen for the release of air as soon as the compressor stops. There is a small metal tab that pushes on the unloader valve that may need to be adjusted. The motor does not have enough power to start pumping if there is air/backpressure in the air line. If these parts are working correctly then check the value of the start capacitor and use meter to measure. The cap should test within 95 % of stated value. Replace parts as needed. Enjoy

Posted on Dec 21, 2008

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Generator electrical problem


No it sounds like the engine is losing power, as the RPM drops the voltage drops, this increases the current load and that trips the breaker.

Jul 21, 2016 | Electrical Supplies

1 Answer

Air Compressor trips breaker under load. If I remove the belt the motor runs fine, spins freely as does the compressor pump. With the tank pressure empty, the compressor starts and runs fine. When it...


Most people recommend replacing the motor capacitor in this situation, since a faulty cap will reduce the starting torque. But in my case the check valve was the culprit - there was too much back pressure on the head.

Oct 22, 2013 | Campbell Hausfeld VT6290 2.0 HP 20 Gallon...

1 Answer

I have the 919.167320 and it keeps tripping the breaker on start up. It must have tripped it 10 times last night. I have it on a 20 Amp breaker. If I cut the switch off and let the tank get down to 40 lbs...


There is a voltage drop, excessive voltage drop in the circuit.
Anything else on that circuit?
Is the circuit wire size #12 awg thru the complete circuit to the outlet?
Any extension cords being used?
Voltage drop is found in high amperage loads. A motor needs about six times the motors rated full load amps value. Drops found in long runs of wire, in loose connections, in smaller Gage wire than needed.
The power outlet in the garage for the compressor may need the next size wire, #10 AWG. Try using a circuit breaker rated for air conditioning use, they have a trip delay.

Aug 31, 2017 | Craftsman 33 Gallon Vertical Portable Air...

1 Answer

A/c starts after it reaches required load it shuts off and when it is suppose to start again it just humms and it trips the circut breaker


It sounds like the small valve that releases the pressure out of the main pipe that runs between the compressor and tank is not working once the tank is full and the motor automatically cuts off. You know this valve is working by the sound of a short spurt if air being released when the motor cuts off. Releasing this pressure means that the motor is able to restart easily because there is no load. If the valve is not releasing this air, the compressor is trying to start under full load which the motor is not capable of doing, hence the humming and popping of breakers due to a current overload as the motor tries to start. Motor burnout is possible if it keeps recurring.

This small release valve is attached to the Pressure control switch that switches the motor On & Off and usually has a small pipe going to it or is incorporated inside the Pressure Control Switch. If the valve appears to be working then it means that the Non-return valve on the input to the tank is not sealing properly and letting air back into the main pipe causing the compressor to start under load. Check both valves for correct operation and replace as necessary.

Sep 15, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Wagner electric asincronous H 100L4 1982 motor MK-250. Compressor will start, get up to pressure okay, but once pressure drops it will stall on restart and trip out mains.


The overload trip is is not rated high enough for the load. When the compressor starts form zero pressure their is little load on the motor. It then pumps ok to the cutout pressure under gradually increasing load. When it tries to start on the intermediate pressure the load is too great as the motor drawers a higher current on start-up and has the additional load of the higher pressure. You have a 15 amp appliance running on a 10 amp circuit or similar depending on your countries supply voltage.

Sep 06, 2009 | Wagner Air Tools & Compressors

1 Answer

Compressor won't restart with any pressure in tank


try replacing the capacitor. a bad start capacitor will not let it start under a load.

Jul 10, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

2 Answers

Hitachi ec12 motor hums after drop in pressue


There should be a pressure switch adjustment under the cover of the switch remove the cover and reset.

Feb 03, 2009 | Hitachi EC12 Portable Electric 2hp Air...

Not finding what you are looking for?
Coleman 3HP 11 Gallon Oil Lube, Direct Drive Horizontal Air Compressor Logo

254 people viewed this question

Ask a Question

Usually answered in minutes!

Top Coleman Air Tools & Compressors Experts

John Trevino

Level 3 Expert

1400 Answers

elunsford

Level 2 Expert

229 Answers

JOHN LAPIER

Level 3 Expert

2535 Answers

Are you a Coleman Air Tool and Compressor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...