husky q19 - Changing belt

by Mike
(Maspeth NY)

Hey Bill, I asked a question about a week ago about belt size for a husky q19 quiet series... Now my

Problem is removing the belt. My guess is the piston needs to be removed? There seems to be no other way. The piston rod is held on by an Allen bolt. I want to make sure it's not an opposite thread bolt because it seems very stubborn. If you can verify these things for me and possibly suggest the best way of removing this bolt (considering its connected to the pulley and obviously spins while attempting to remove it) without damaging anything.

You were a great help last time and sure you will be again

Mike, I don't have your compressor so I've never done it. I expect a reader has though, and I hope they post their experience.

You did talk to the Home Depot store? Ask the clerk to show you how? :-)



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husky q19. 19 gallon 1.5hp = Belt size

by Mike
(Maspeth NY USA )

I have a husky quiet series q19. 19 gallon 1.5hp that needs a belt and I am just trying to find out the size of the belt and where I can get one. Thanks
Mike, take the compressor with you to an auto parts outlet, or a farm outlet. Both sell a broad range of belts. They can do a measure and find one that fits.

When you have the belt installed, the belt should flex about 1/2" from center when you push on it. That's the normal correct tension. Doesn't matter what belt you get if that's the belt tension you end up with, and the belt itself fits the sheaves.



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air compressor slows down then belts squeel

by b vecchoini
(chesr va)

when air compressor is running just befor pressure is reach it starts tio slow down ten the belts star to squeek and the motor hunsi hve to shut it off to keep from burning off the belts

Bill says...

Belts are a friction drive device, designed to allow separate sheaves on a drive train to link together, to be misaligned slightly and still work, and to slip when one part or another of the drive is lugging.

In your case it seems to me that the motor is OK since I infer that your belt is slipping on the pump shaft sheave.

What I think is happening is as the load on the pump increases with air being compressed into the tank, and making the pump work harder, your pump is slowing, rather than overcoming the increased load. This, in turn, because the two sheaves are connected with the belt, is trying to slow the motor.

The motor isn't designed to be slowed, so it's trying to keep rotating at its design speed.

Your pump continues to slow as the back pressure increases, the motor has to work harder to overcome this slowing, this is overloading the motor, and ultimately, something has to give. In your case, the motor drive force breaks the friction between the belt and the pump sheave and the belt starts to slip. This heats the belt too, and can soon cause a belt break.

To me, this points to an advancing compressor pump failure.

If your compressor pump is oil lubed, do you have sufficient oil in the sump?

There is normally little that can impede the flow of compressed air from the pump to the tank. There is a check valve at the tank end of that line, and if, somehow, that check valve becomes blocked, or becomes difficult for the compressed air flowing from the pump to the tank to force open, that might, and a very slight might, account for the pump slowing as the pressure builds.

I'm guessing you've got a mechanical problem in your pump. Could be valves, but I suspect it might be more serious than that.

Good luck, and keep us posted, if you will.


Comments for air compressor slows down then belts squeel

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Mar 05, 2012
Compressor slowing and kicking out breaker
by: First Choice Collision

I have an 80 gallon 7.5hp Sanborn Compressor. I built a little house around the pallet its bolted to, to keep the noise down. It is insulated with carpet pad. when it is over 70 degrees outside, the compressor will slow down after is has cycled a couple times and get to the point of kicking out the breaker on the motor. Is it possible that the little house is causing it to get too hot?
It burned off a belt recently and when I bought a new belt for it, I got it at Oriellys auto parts. It was suppose to be better than the factory belt. but its only been in use for about 3 months and has already started burning it up. I would be under the impression that this compressor could withstand severe heat temps. But not so sure now.
Sure sounds like you are overheating it.

If you are, you are contributing to excessive wear on the motor and the pump.

Try running it without the "house" to see if that makes any difference. If it does, you need to ventilate the housing.

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Why husky air compressor burning up belts

by dan
(collierville tn)

replaced belt ran up to pressure. When pressure dropped down compressor came on and burnt up belt. this has happened three times. Is pressure switch problem starting up under too great of load?
The first thing to do is to check and ensure that the belt tension and belt alignment is correct. Sometimes motor mounts looses over time and get misaligned.

I expect you've checked this but had to mention it as the first check.

Please empty the tank and run the compressor up to cut out and make sure that the unloader valve works. If it does not, that may account for the increased load on start up, though that usually manifests itself as a breaker letting go rather than a belt burning up.

With the tank empty and the compressor off, pull, inspect, clean if necessary or replace the tank check valve. Make sure it works properly and actually opens when the air is being blown into the tank from the pump head, and closing when air would attempt to blow out of the tank.

Another check would be the intake filter to see if it's plugging up, and are you getting good suction at the intake port.

Let us know as a comment here what you found, please, Dan


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