1960 Generator Pulley Installation

[Pete P.]

I bought a new pulley for my generator and have the generator out of the car. I'm trying to torque the pulley nut to the 50-60 ft-lbs as listed in the AIM. How do I hold the shaft from rotating? The AIM shows a fixture of some sort to hold the generator safely and a stall wrench to hold the pulley/shaft from spinning. I searched the TDB and archives and couldn't find the answer. Any help is appreciated.

Thanks,
Pete

[Jim L.]

Re: 1960 Generator Pulley Installation

Use an impact wrench to R&R generator and alternator pulleys. You can also somewhat secure the pulley with a V-belt tightly wrapped around it. But still, use an impact wrench.

[Pete P.]

Re: 1960 Generator Pulley Installation

Jim, thanks for the tip, but don't you still have to hold the shaft from spinning?

[Mike E.]

[Pete P.]

Re: 1960 Generator Pulley Installation

Ok, thanks Mike. There is one thing that concerns me. I got the pulley on fairly snug and spun it by hand. The pulley looks like it doesn't spin true. There's a slight "wobble." Not real bad. Could the pulley be bent?

[Jim L.]

Re: 1960 Generator Pulley Installation

Jim, thanks for the tip, but don't you still have to hold the shaft from spinning?

You probably don't even need to use the V-belt. The mass of the armature is pretty much sufficient to resist the instantaneous impulses from the impact wrench.

[Jim L.]

Re: 1960 Generator Pulley Installation

Ok, thanks Mike. There is one thing that concerns me. I got the pulley on fairly snug and spun it by hand. The pulley looks like it doesn't spin true. There's a slight "wobble." Not real bad. Could the pulley be bent?

I'd bet on it.

[Pete P.]

Re: 1960 Generator Pulley Installation

The pulley is a reconditioned pulley l bought from CC.

[Jim L.]

Re: 1960 Generator Pulley Installation

The pulley is a reconditioned pulley l bought from CC.

If it wobbles then they didn't do enough reconditioning.... whatever that means. Pulley's aren't supposed to wobble.

[Pete P.]

Re: 1960 Generator Pulley Installation

I not sure if my wording was correct when I said "wobble." The pulley doesn't visually look straight when you spin the shaft by hand. The spacing between the pulley and fan isn't the same when spinning. I'll have to get another pulley which is "new" not reconditioned. I guess I got what I paid for. I'm hoping it's not a bent armature shaft.

[Richard M.]

Re: 1960 Generator Pulley Installation

Pete, you can "Motor" the generator on the bench to check the armature shaft.

Excerpt from a document HERE on Page 1 .....

battery Positive (+) lead to the "A"(armature) terminal,Rich

[Pete P.]

Re: 1960 Generator Pulley Installation

Rich,
I did the "motor" test and everything is running quietly. However, the pulley is not spinning straight. I'm trying to figure out how to upload the video.
Pete

[Pete P.]

Re: 1960 Generator Pulley Installation

Which direction should the generator spin in this test?

[Richard M.]

Re: 1960 Generator Pulley Installation

Rich,
I did the "motor" test and everything is running quietly. However, the pulley is not spinning straight. I'm trying to figure out how to upload the video.
Pete

Which direction should the generator spin in this test?

Pete, Maybe the pulley is true but the fan blades may be off a bit and are tricking your eyes. But if it's really the pulley, then I wouldn't use it. You'll have to remove the pulley and motor it again to see if the shaft is true.

Direction? Not sure why it matters but it should be the same as when the engine runs it, clockwise looking from the front of the engine, front of the generator.

Rich
PS You cannot upload a video here. Unless you rename it and zip it but it has to be less than 5.72MB. If you have a Youtube account best to upload there and add the link to it in your post.

[Pete P.]

Re: 1960 Generator Pulley Installation

Thanks for reply. I'll take the pulley off and rerun the motor test with just the bare shaft.
Pete