[markdcoco]

Gents,
Can any one tell me if there is a web site where I can cross reference an older electric motor part number... or where I can actually purchase an older electric motor (P/N: 5KCP39FG R251S)
Thank You,
Mark

 

[300zx]

Are you sure the part number is correct.Can't find any thing with that number.

 

[micromind]

That's most likely a GE motor. Part numbers are very hard to cross-reference. A lot of them belong to the manufacturer of the equipment that the motor is installed in. Also known as 'OEM numbers'.

If the motor has a frame number, (like 48 or 56), it will interchange with any other motor of the same frame. If there are letters along with the frame number, they could be important.

Any letter in front of a frame number means nothing. A 56 frame is identical to a B56. Letters following the frame number are important.

C = face mount. A race is machined on the shaft end, and it's designed to be bolted to a similar race on the driven machine.

H = Used on 56 frames, it means that there are a set of mounting holes at 3", and at 5".

J = Close-coupled pump. The shaft is threaded, and there's a race to mount the motor directly to the pump frame. The impeller threads onto the shaft. Usually found from 1/3 HP up to 50 HP.

T or U = These are standard mounting and shaft dimensions established by NEMA. U frames are older, T frames are more modern. Usually found from 1 HP to about 350 HP.

Y = Non-standard mounting. Usually found on pedestal fans and the like.

Z = Non-standard shaft. Usually a 56Z frame has a 1/2" shaft, 5/8" is standard. 56HZ usually has a 7/8" shaft, the 3" & 5" mounting holes.

If the motor is not a standard frame, it'll be hard to find a replacement that fits.

The standard frame sizes are 42, 48, 56, 143, 145, 182, 184, 213, 215, etc. Since a 215 frame is usually 10 HP, and this is a DIY site........I really didn't see any need to include something like 300 HP 447T frame!

Rob

 

[J. V.]

Try any of these manufacturer web sites below. They all have cross reference tools. As Rob stated above, many motors are proprietary to a certain company. Look hard at the name plate for any other numbers that might give us a hint as to the frame. If you get the wrong frame it will not fit where the old motor did. That for sure is a GE part number. Try calling GE first to find out if it's proprietary. If it is, ask them for the phone number of the owner. Then get a price from them.
Write down EVERYTHING on the nameplate. Rob or myself can see if the frame number is hidden in a bigger number, or a combination of numbers and letters. It could be in the serial number for example. So post all the nameplate information.

www.baldor.com
www.wegelectric.com

Both of these web sites have cross reference tools on board.

 

[markdcoco]

thank you

Gentlemen,
Thank you for a very timely and thorough response. The motor is a GE motor and it comes out of a Trane AC unit driving the fan on the outside cooling unit. I will first try the cross reference web sites. I attempted the same last night with others, with no success. If I don't have any further success today I will get some more information from the motor and impose on you for more assistance.
Thank you again...
Mark

 

[Yoyizit]

a Trane AC unit driving the fan on the outside cooling unit.

Get a motor that's designed for the high amb. temp. air that this motor will be seeing.
Motor life halves for each 10C rise above ambient.

 

[markdcoco]

GE Motor Info

Gents,
Thank you for all of your inputs. I have had no success trying to cross reference my motor, but have gotten the following information from the motor (from a Trane XE1000 AC Unit (circa '95)):

P/N: 5KCP39FG R251S
CPN: C140267P01
CL B INS CONT AIR OVER
THERMALLY PROTECTED
HZ = 60
PH = 1
RPM = 1075
HP = 1/5
V = 200-230
A = 1.5

Here is another number on it which I don't know is of any significance:
952690006323

There is a four (4) bolt mount on the back side. Not sure what the shaft diameter or length is.

Any help would be greatly appreciated.

Mark

 

[Yoyizit]

CL B INS CONT AIR OVER
THERMALLY PROTECTED
HZ = 60
PH = 1
RPM = 1075
HP = 1/5
V = 200-230
A = 1.5

If you know the shaft diameter and rotation direction Grainger can probably set you up with an electrically, and maybe even mechanically, equivalent drop-in replacement. You can go 1/5 hp or slightly larger.
Tell them the shaft has to be vertical. It supposedly makes a difference in the bearing construction.

Table 430.248 (table 9.2 in this link) is more pessimistic about the current draw for a motor this size
http://books.google.com/books?id=DD...X&oi=book_result&ct=result&resnum=4#PPA123,M1
which makes me think, again, that the NEC uses 95th percentile values.

This motor is already only 50% efficient.

 

[micromind]

Post this on the HVAC forum. There's a few guys over there that work on these units regularly, they know more about HVAC motors than the rest of us.

Rob

 

[J. V.]

If you know the shaft diameter and rotation direction Grainger can probably set you up with an electrically, and maybe even mechanically, equivalent drop-in replacement. You can go 1/5 hp or slightly larger.
Tell them the shaft has to be vertical. It supposedly makes a difference in the bearing construction.

Table 430.248 (table 9.2 in this link) is more pessimistic about the current draw for a motor this size
http://books.google.com/books?id=DD...X&oi=book_result&ct=result&resnum=4#PPA123,M1
which makes me think, again, that the NEC uses 95th percentile values.

This motor is already only 50% efficient.

Grainger help select a proprietary motor replacement? You must not deal with Grainger very much. They cannot help anyone. You could call Burger King. Grainger sells parts and equipment. They help know one.

OP. You only have two options. 1, Call the manufacturer and order from them. 2, get a set of calipers and measure all the frame dimensions to see what you actually have. You also have a 6 pole motor. This even further complicates.

 

[gillespj]

Hey I need one of those motors to,mine is starting to make noise every so offten. Did you have any luck finding a replacment ,if so please let me know. I live near the I-17 and Happy Valley

 

[markdcoco]

AC Motor Replacement

The guys at Grainger crossed it to a Dayton 4M205G ($70) and the matching 5uF capacitor ($5). This is a four wire motor vs. the three wire GE I replaced. I wasted an hour attempting to wire it in using the three wire option with no success, but then chose the four wire installation and was done in five minutes. Works great. Beats the $400 I was quoted by a local AC company.
Mark

 

[J. V.]

Good job. This just serves as a lesson on specialty motors. They try to make it where you have to go to them for the replacement. I am surprised Grainger was able to help. In my dealings with them, no part number no part.

 

[Yoyizit]

I am surprised Grainger was able to help. In my dealings with them, no part number no part.

Better reply. It avoids
http://en.wikipedia.org/wiki/Defamation

 

[markdcoco]

Grainger

I personally have never had a problem. Used them extensively to engineer repairs for some very old aerospace training equipment and always found them helpful. Saved my bacon this time. Part number was worthless. Gave them the specs from the motor label and they gave me a solution.

 

[J. V.]

I personally have never had a problem. Used them extensively to engineer repairs for some very old aerospace training equipment and always found them helpful. Saved my bacon this time. Part number was worthless. Gave them the specs from the motor label and they gave me a solution.

Good to hear some positive remarks concerning Grainger, since I have zero positive comments regarding them. :no:
Things must be different with Grainger. I have never received any assistance from them on a technical level. I have never had them successfully cross a motor unless they knew exactly what it was and had a part number for it. Did Grainger come out and measure the frame for you? No. They crossed it against the information you gave them and sent you a new motor. Since it was an every day HVAC motor, that could have been the diferrence. Try a P base pump motor with a proprietary label and they would be scratching their head. They will not know what a "P" base is. :huh:
I will say that the tech support team is much better than first contact customer service rep. Most of them were selling washing machines or computers last week. :yes:

Defamation? How can it be when it's true. Opinions are welcomed in any format. IMHO.

 

[markdcoco]

As you say, everyone's experience is different. My motor issue was fairly simple. Over the phone I was directed towards a significantly more expensive motor which I didn't need. I walked into the local office and worked with a very smart man there who got me exactly what I needed. Nothing complicated here in AZ as AC motors burn up all the time and there were several other people at the counter with significantly less information than I had attempting to buy replacements. But he did take the time and had the smarts to get it right the first time.

 

[J. V.]

As you say, everyone's experience is different. My motor issue was fairly simple. Over the phone I was directed towards a significantly more expensive motor which I didn't need. I walked into the local office and worked with a very smart man there who got me exactly what I needed. Nothing complicated here in AZ as AC motors burn up all the time and there were several other people at the counter with significantly less information than I had attempting to buy replacements. But he did take the time and had the smarts to get it right the first time.

To bad we do not have that type of help here. The counter people know nothing. I always had to call tech support for minimal assistance. Thats why I use a motor shop. They usually do not like to fool around with HVAC fractional's as replacing is always cheaper than repairing them.

We have another place here that specializes in fractional HVAC motors and controls and will work directly with the public. If I need a motor like this, I just bring the old one in and they find the replacement. They usually have it in stock.

 

[Yoyizit]

Defamation? How can it be when it's true.

Yes.
"The most important defense to an action for defamation is "truth", which is an absolute defense to an action for defamation."
The problem is,
http://en.wikipedia.org/wiki/Burden_of_proof
is on you to prove that they have never helped anyone.

There may even be some doctrine where, even if it is true, your intent was to defame rather than bring to light some useful truth.
Ms. Leah, you can step in here anytime you want to

 

[J. V.]

Yes.
"The most important defense to an action for defamation is "truth", which is an absolute defense to an action for defamation."
The problem is,
http://en.wikipedia.org/wiki/Burden_of_proof
is on you to prove that they have never helped anyone.

There may even be some doctrine where, even if it is true, your intent was to defame rather than bring to light some useful truth.
Ms. Leah, you can step in here anytime you want to

I have serious concerns about you. Have you seen a doctor lately? A shrink? If you can TRY to turn a conversation about cross referencing motors into a legal conversation, you are in the wrong place. :whistling2: