Ingersoll Rand compressor motor

[koolhandluke]

Big question. I purchased this Ingersoll Rand SS4L5 air compressor. Single stage twin cylinder. Approximately 13 months the motor decides to fail permanently (burnt up). I do not know enough about electric motors to make a wise decision on replacing this motor. I do know this particular motor seems to be the most expensive one on the internet. I am hearing even the frame # holds a hp difference. I’m looking to find a less expensive motor that will serve the purpose. Help!

 

[The Cobbler]

can't read much as pic is to small, but if you match the HP, RPM,Shaft size , compressor duty rated you should be well on your way to a new motor . the only other thing would be the mounting bracket points

 

[KenC]

I can see the HP, 5 but not the frame info. That is critical to get a good fit.

 

[koolhandluke]

Here you guys and I’m not worried about the mounting points as I worked as a millwright for some time. I can make the adapter plate if needed.

 

[koolhandluke]

I have found these motors and the 3 most common differences are KW 4.6——-Amp 22 - 21 ——-and of course frame 143T or 56Hz. I’m reading which it’s hard for me to believe it’s saying switching frames is like putting a 4 cylinder in a bus.

 

[koolhandluke]

When you find the motors with the same frame size they are twice the price

 

[BillK]

I dont know where you are located but most larger metropolitan areas still have a few electric motor repair shops. That might be a more economical option.

 

[chinboys]

Check the motor's start and or run capacitor after you determine you have the right voltages and ground.
Then disconnect the power leads and ground at the capacitor and ohm each wire to see either a short or open... you ought to see some resistance.
Lastly, check the motor's thermal fuse.

 

[mike93lx]

Did you determine what made the smoke get out?

I agree on trying to find a motor shop, although they are not super common and, if they do mostly industrial work, will tell you to just scrap anything under 10hp.

 

[micromind]

The frame is 182/4Y This is pretty standard for a 5HP.....a real 5HP, not a 2HP advertised as 5HP, as is common with air compressors.

The Y usually means a non-standard shaft. A 182 or 184 T frame motor will have a 1 1/8" shaft, this one might not.

 

[koolhandluke]

I’ve already had the motor torn apart. The wires are blown in the housing. Not Feasible to be fixed. This motor has a 7/8 shaft 2.25 in length. I guess the main question I’m needing answered is will a 143 or 56 frame have the same power as my 182 ?

 

[micromind]

HP is HP. But be careful, many compressor motors are advertised to he 5HP but they are actually more like 2.5, 3, 3.5

The key is amps. A true 5HP motor will draw between 19 and 25 amps.

A 56 frame motor will have a 5/8" shaft, 143T/145T will be 7/8" and 182T/184T is 1 1/8". If there's a letter other than T (usually Y or Z) then the shaft will not be normal.

 

[KenC]

IME the 5hp 56 frame motors are not long lived. I believe they are designed for intermittent duty and on small portable compressors work OK, for a while. I wouldn't want one if using my compressor for driving air tools like sanders, grinders, etc.

Lots of compressors have 5hp on the tank lettering, but SPL on the motor. Dead giveaway.

Changing frame specs may change the shaft size, shaft to base measurement as well as the bolt pattern. Also pay attention to the
RPM, lots of the 143/182/184 will be 1725. While I like the slower motors as they are quieter, they would require a bigger pulley to maintain pump rpm and CFM.

I took a quick look at eBay, there are several used candidates for sale. If you happen to be near one of them shipping could be avoided.

 

[koolhandluke]

Let me get this right. Your saying to stay away from the 56 frames and find one of the others with lower RPM and change pulleys. I have no problem with that scenario.

 

[micromind]

Let me get this right. Your saying to stay away from the 56 frames and find one of the others with lower RPM and change pulleys. I have no problem with that scenario.

This will give you the most dependable longest-lasting installation.