Champion oil pump gear

[Kdancy]

How does one pull the oil pump gear from a champion without the special J-2959 puller?

[sasquatch]

I asked the same question a year or two ago and everybody said you don't need a puller, the gear just slides off. Not on my engine! So I modified an old two jaw gear puller and pulled it off. After cleaning/sanding the shaft and the gear bore the gear would slide on and off easy. Watch the key when you reassemble the pump; it loves to get pushed out of the shaft by the gear.

[Kdancy]

I wound up taking an old 1/2" drive socket, welding a nut on top and welded and shaped a washer on bottom to act as the pull-- and pulled it off. Mine would not just slide off either. I'll take the time to make a better puller now that I know how it works.

[Lothar]

I would really like to see pictures of one of these homemade puller tools so I can make my own. Would one of you PLEASE post some pictures? I have put off replacing my oil pump-to-engine gasket because I didn't have a good idea for how to get that gear off without the special tool. Thanks

[Kdancy]

I took a socket that had a big enough hole to slide down all the way on the idler gear shaft. The "catch" had to be ground to fit down into the pump housing, yet long enough to get under the main gear when the housing is held up. Then just screw the bolt down and it will pry the gear up as the bolt is screwed in.
Now, when I make the next one, I will take a piece of stock, drill the right size hole in it to fit over the shaft, weld the nut in place and then weld a grade 8 washer on the bottom, then grind to fit in the housing and under the main shaft.
I hope this makes sense.

[Lothar]

Thanks, Kdancy!
I'm a visual person, so having the picture to look at helped me a lot

[sasquatch]

Gear Puller

I originally tried making something like your socket but I'm not a welder and I couldn't get it to work. So here's what I ended up with. I ground off the bottom of the left jaw so it would fit under the gear and drilled a new hole higher up in the right arm so it would reach down under the pump housing. Not the greatest but it worked good enough to get the gear off.

[mbstude]

Here's one a friend had made. Works beautifully...

[sasquatch]

OK, that looks great. Get your friend to make some more of them. I'm sure he could sell them without any problem.

[rockne10]

Snap On pays for tool ideas if they result in production.
Shouldn't your Snap On dealer be carrying one of these on his truck?

[JJWMACHINECO]

Here's one a friend had made. Works beautifully...

Hey, that sorta looks like one I have made in the past. Wait a minute, that is the one I made. Well everyone, it works great. Just slide it on the idler gear shaft, rotate it 180 degrees with a 7/8" wrench to bring the gear off the bottom of the housing. Then run down the center bolt to raise the gear off the shaft. I made it out of 4140 alloy steel and it was heat treated and tempered. This is a high quality tool that I made in my machine shop for my valued customer and friend.

JW

[mbstude]

Hey Jeff, I had a feeling you might chime in. Glad you did, saved me from getting all of those details wrong.