Air Conditioning - Need Blower Motor Wiring Advice

Hi All

I have just replaced my old 115v 1/2hp GE blower motor
(I was over 20 yrs old, dirty and I could smell it)

I replaced it with a GE motor of the same specs but a slightly different wiring arrangement. After I installed it, it wont turn over. Just hums loudly. I'm wondering if:

1. I have it wired properly
2. If it needs to be lubed before use (it seems very stiff to turn)

There are three wires coming from the HVAC to the blower. White common, Blue high speed, Red Med/Low.

On the old motor (a 4 speed) red was hooked to Med, blue to high. The new motor only has Low and High (Red and Black)

I connected red to red and blue to black.

I connected white to white.

As for the cap, the old motor used a 10/370. The new one specifies a 5/370. The new 5uf cap I got is about 1/3 the length of the 10uf. Looks too small to get the job done but I guess it's the rating that counts.

The old motor had 2 yellow wires which connected to the cap. The new motor has a brown and brown w/white stripe. Does it make a difference which connects to which terminal?

One more thing, the old motor ran only CW. The new motor is set for CCW but can run either way based on how you connect some wires with snap apart connectors. (Swap yellow and orange to change direction)

Anyway, when I hooked everything up, it just hums loudly. Like it wants to go but can't.

Any suggestions/ideas?

Do you have the two wires for the cap on the same terminal?

Is red - low and black - high on the new mtr?

There should be a wiring diagram on the side of the new mtr,
double chk your wiring there.

Did you hook up ground?

It should not need to be lubed first, are there oil ports?
They would be little yellow caps.

I have seen more then one mtr come bad out of the box, it shouldn't be stiff.

No, the wires are on different terminals of the cap.
Yes, red is low, black is high on the new motor.
Yes, ground is connected to the mounting frame (as it was with the old motor).
Don't see anything that might be immediately identified as oil ports (no yellow caps)

And yes, it came out of the box remarkably stiff to turn (I didn't question it because I thought it was normal).

You might try loosening the end bell bolts a little and turn the shaft to see if it loosens up. If it does, tighten the bolts a little at a time while turning the shaft. I remember one time I had a motor shipped to me and when I got it out of the box I could see where it had previously been installed [allen screw marks on the shaft]. The guys at Johnstone were very aplogetic.

Forgive my ignorance, daddyjohn, I don't know what Bell bolts are. The bottom of the motor has a flat circular cover at the center which has teeth arount it for placing the rubber isolation rings on to which is afixed the mounting frame. There is a similar cover around the shaft at the other end. Don't see any bolts anywhere for adjusting.

Should I take this motor back where I bought it?

He is talking about thru bolts, there should be four. They go through the motor housing on the outer edge of the motor.

However if the motor is as tight as you say I would return it.