how to get bushings out of oil pump without busting the casting (again)

[Sunny the Model A]

Ok y'all, got a funny one for you. I discovered that whoever did my oil pump last only replaced the shaft and idler and left the old bushings in the casting, so I decided to get some new bushings and install them. (read this with heavy southern drawl) Well, I done goofed this one up. I used a bushing driver with the intentions of pushing the top bushing out through the bottom. 5 strikes in, crack. Followed by some loud blue fire from yours truly. now I got another casting that also has bad bushings, how do I get those little jokers out of the casting without busting it again? and for the record I kept the broken casting and am going to braze it in my spare time. thanks for y'alls time.

[Gary WA]

Originally Posted by Sunny the Model A

Ok y'all, got a funny one for you. I discovered that whoever did my oil pump last only replaced the shaft and idler and left the old bushings in the casting, so I decided to get some new bushings and install them. (read this with heavy southern drawl) Well, I done goofed this one up. I used a bushing driver with the intentions of pushing the top bushing out through the bottom. 5 strikes in, crack. Followed by some loud blue fire from yours truly. now I got another casting that also has bad bushings, how do I get those little jokers out of the casting without busting it again? and for the record I kept the broken casting and am going to braze it in my spare time. thanks for y'alls time.

do you have Les Andrews mechanic book?

[JayJay]

To get brass bushings out of castings, I first try threading a coarse tap into the bushing, then use a brass drift on the end of the tap to gently drive the bushing out. Don’t hit too hard, taps are brittle. A bit of heat on the casting sometimes helps break it loose. If that is unsuccessful, I use a hand-held hacksaw blade to cut a groove in the bushing opposite the split in the bushing (if there is one, sometimes not) and then fold the bushing in onto itself. A nail (say 12d or 16d) ground to a chisel point helps.

[BRENT in 10-uh-C]

Like JJ, we just use a tap threaded into the bushing and a metal rod up thru the pump. Unlike the previous good advice, we are 'less-gentle' and just pound the rod against a flat place on our vise which pushes them out rapidly. We typically rebuilt 5-10 pumps at a time, so we are always in a hurry dismantling and cleaning.

[ursus]

I use a 13M metric tap (0.512 inches) in the manner described by Brent in Post #4. This method works as well for removing distributor bushings also.

[Randall]

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[Sunny the Model A]

thanks for all the advice y'all, I do have the red book and did a little figuring and decided to try the washer and punch method, it took about 10 minutes as I now take things nice and easy. Got the bushings out with the casting intact. Guess my old casting that broke was just ready to let go. I got my rebuilt pump back in the Truck. Thanks, Y'all

[dave in australia]

Another option is to make two hacksaw cuts 180degrees apart. The bush will fall out.