Air Compressor Motor Capacitor Replacement Question.

[RonRock]

I have received a motor to replace the one that I have now. Same size and speed 5hp. 1745 rpm single phase.

The replacement is a used unit that was taken out of service for unknown reason. So I'd like to get it running to see if it is a worthy replacement. Seems like a good upgrade so far. But the issue is that the motor is missing 1 of the start capacitors, and wires that connect. So here I am.

This is a Baldor 5hp, 1725rpm, 1ph. FDL3612TM. The run capacitor is 30mf/370V, and the existing start cap is 216-259UF/250v. I assume that the start caps are the same value, so I have received 2 start caps 216-259UF, and a run 30mf. Probably have wrongly noted between UF and mf. Sorry.

Since there was a missing cap when I received the motor I have to figure out how to wire the replacement caps. I ordered and received a set of cheap Amazon caps. Probably not the best, but a starting point. My issue is obviously the missing cop wiring. The Baldor sheet says that "Multiple Capacitors are connected in parallel"

My question is where does wire #1 go? Terminal #2, or #3 in my poorly drawn paint drawing.

 

[mm08822]

Like this....all 3 caps have one side tied to 8.

ETA: See this recent thread for almost a parallel discussion:

Baldor 7.5 HP Motor 36E002Y318 Let the Smoke Out - Capacitor Failure

Yesterday my air compressor was running fine till it wasn't. Came into the garage and there was a very odd smell similar to burnt brownies from a kitchen oven. Motor was found to have an oily residue from the base of the capacitor cover with remnants of shredded cardboard like material...

www.garagejournal.com

 

[BillK]

There is this thing called "Google" ??
file:///C:/Users/User/Downloads/FDL3612TM-InfoPacket-1.pdf

Wiring diagram is almost at the end.

 

[fitter30]

Page 11 motor manual , change both start caps

https://www.google.com/url?q=https://www.galesburgelectric.com/content/pdfs/baldor/FDL3612TM.pdf%3Fsrsltid%3DAfmBOooa8Ahpdd4_XVpPDieNKCanRW_XaVYNxGMBouAzHn2bmFtKU30_&sa=U&ved=2ahUKEwjftODzspaRAxUlGtAFHSuWBcYQFnoECAIQAg&usg=AOvVaw1I-n0UkcPWK5ruGtVEyunX

 

[RonRock]

There is this thing called "Google" ??
file:///C:/Users/User/Downloads/FDL3612TM-InfoPacket-1.pdf

Wiring diagram is almost at the end.

Is this on your C drive? What would I Google?

 

[dave*99]

There is this thing called "Google" ??
file:///C:/Users/User/Downloads/FDL3612TM-InfoPacket-1.pdf

Wiring diagram is almost at the end.

Shhh. You'll cut GJ traffic in half.

 

[dave*99]

Is this on your C drive? What would I Google?

Google "FDL3612TM Schematic"

 

[RonRock]

Like this....all 3 caps have one side tied to 8.

ETA: See this recent thread for almost a parallel discussion:

Baldor 7.5 HP Motor 36E002Y318 Let the Smoke Out - Capacitor Failure

Yesterday my air compressor was running fine till it wasn't. Came into the garage and there was a very odd smell similar to burnt brownies from a kitchen oven. Motor was found to have an oily residue from the base of the capacitor cover with remnants of shredded cardboard like material...

www.garagejournal.com

Thank you mm08822 for the help. #3 was my guess, but just a guess. I'll take a look at the link.

​

 

[RonRock]

Like this....all 3 caps have one side tied to 8.

ETA: See this recent thread for almost a parallel discussion:

Baldor 7.5 HP Motor 36E002Y318 Let the Smoke Out - Capacitor Failure

Yesterday my air compressor was running fine till it wasn't. Came into the garage and there was a very odd smell similar to burnt brownies from a kitchen oven. Motor was found to have an oily residue from the base of the capacitor cover with remnants of shredded cardboard like material...

www.garagejournal.com

Good pointer. Good information. Thanks.

I'll also give my centrifugal switch a good look over.

 

[larry4406]

Good pointer. Good information. Thanks.

I'll also give my centrifugal switch a good look over.

I wound up buying my stationary switch from an Ebay seller as it was cheaper and still OEM.

 

[RonRock]

I wound up buying my stationary switch from an Ebay seller as it was cheaper and still OEM.

More good help. I was wondering if I do need to replace mine if it would even be available. It's an older motor.

 

[wyliesdiesels]

There is this thing called "Google" ??
file:///C:/Users/User/Downloads/FDL3612TM-InfoPacket-1.pdf

Wiring diagram is almost at the end.

ummm you shared a link from your computer hard drive which we cannot open lol

 

[larry4406]

I Googled the OP's motor model number. Attached is the best info I could find. Similar to mine, no exploded parts diagram.

From the parts list, I am thinking that the stationary switch is SP5172A11 should he need it.

sp5172A11 at DuckDuckGo

DuckDuckGo. Privacy, Simplified.

duckduckgo.com