Now that we have popped the alternator out of Grona, we can replace the bushings on the mounts and put the old alternator's pulley onto the new alternator.
Put it in a vise and undo the bolt with a 16mm socket.
I used on old leather belt around the pulley in the vise so as to not put vise marks on it.
The nut is a 22mm, by the way.
The pulley just wanted to turn. I'm not too surprised. I had Plan B ready.
Check out the impact gun/wrench. It's a Ridgid cordless one - uses an 18 volt battery. According to the specs, it has 325 lb-ft of torque! Of course an air gun has more, but this is much more portable.
Cordless tools have really come a long way. That thing packs some real power.
I want to start taking Grona's suspension apart and replace all the bushings now that I have this cool impact gun.
But first things first. I need to finish this job.
25 years is pretty good I'd say.
It's in bad shape too.
In case you needed to know.
I always figure, when you have it all apart, go ahead and do it right.
|Well, it's the Queen's Award, innit?|
I have some Powerflex poly bushings for the mounts. They're stiffer than the stock rubber bushings - should help keep the infamous c900 alternator wobble under control.
The bushings are made in England (where most of the world's race cars are built). And if you look closely, you'll see they won the 2013 Queen's Award for Enterprise International Trade.
Good thing, that.
Apply it to the outer and inner surfaces of the bushes before installing.
Powerflex make three levels of bushings: yellow, rated at 70 on the Shore A Durometer scale (about 25% stiffer than stock) purple, which are 80A (30% stiffer), and black, which are 95A (80% stiffer). The latter are for race applications.
Love that purple color. Too bad they'll be mostly invisible when the alternator is back in!
The top bolt hole on the alternator mount is where the alternator ground lead goes. I cleaned it up to ensure a good connection. You can see it's a bit shinier than the other two holes.
Fortunately, it is.
The shot on the right is a comparison between the two - the stock 80 amp Bosch 124x on the right, versus the 115 amp Bosch 129x on the left.
The cases are virtually identical. The only slight difference is that the location of the B+ terminals is rotated slightly, but it's no problem at all to install.
The other thing to be aware of is the ground bolt. On the stock alternator, there is one longer case screw that the ground bolts on to (see the image). On the 129x, there is a threaded hole that I used for a ground - I'll show that in a minute.
After reading up on this on the interwebs, I was reasonably sure it would be a straightforward conversion. I just couldn't find any pictures to confirm the sizes of the alternators. Pictures! I need pictures!
Now I have one.
I just took it off the old alternator and put it on the new one. Exact same location.
I probably could have used that longer case bolt from the old alternator, but the new one is so clean that I didn't want to put the old bolt on!
Note also that the supressor is installed as well.
Funny picture - the lens focal length (24mm) makes it look like the ratchet is bigger than the alternator!