Best way to remove fisher price pinion???

[JB987]

Anybody out there know the best way to safely remove the 19 tooth pinions on this year's fisher price motors? The pinion remover sold by banebot sure doesn't do the trick!

[nparikh]

I would recommend not using a grinder or saw. We went to the mobile machine shop at Championships last year and they had to use the two because they didn't have a puller.

It did not end very well...

[AJ R]

Try using a nut splitter referred to in this thread about getting the pulley off of the large cim.

http://www.chiefdelphi.com/forums/sh...lley+large+cim

[Josh Murphy]

We use a pin that is slightly smaller than the shaft and then use an arbour press to take it off. It works real well for us, I just did some fisher price motors the other day and had no problems.

[jgannon]

You asked for the best way, and Dremeling certainly isn't it, but it works if you're careful. We succeeding in taking off a few pinions this way in 2006.

[Richard McClellan]

I tried using the banebots puller last night as well and after dremelling off some of the pinion teeth just to get it to fit, we tried the puller, and it just bent.

Next I tried using a drill press, and put the banebots puller pin in the chuck, and tried pressing out the shaft and the drill press setup was just not rigid enough.

Finally, I had to take the motors to the machine shop at school and use their arbor press, which did work since it was a more rigid setup.

But, while I was using the drill press method, I accidentally slightly bent the shaft on one of the motors. Anyone have a link or know how to buy more?

[MasterMkanik]

My method is just get a bigger hammer.

[Cory]

Originally Posted by JB987

Anybody out there know the best way to safely remove the 19 tooth pinions on this year's fisher price motors? The pinion remover sold by banebot sure doesn't do the trick!

Joe,

I too was unhappy to find that the banebots puller is useless, after buying it specifically for that purpose.

We made a plate awhile ago we use to remove it. It's a 1/2" thick aluminum plate, with a slot in it that goes most of the way through the depth of the plate, just wide enough to clear the pinion gear. We then mill a second through slot in the middle of this slot that acts as a clearance hole for the motor shaft.

You can then slide the motor onto the plate, and use an arbor press with any sort of pin to push the pinion off of the motor.

This has worked pretty well for us.

[AdamHeard]

Originally Posted by Cory

Joe,

I too was unhappy to find that the banebots puller is useless, after buying it specifically for that purpose.

We made a plate awhile ago we use to remove it. It's a 1/2" thick aluminum plate, with a slot in it that goes most of the way through the depth of the plate, just wide enough to clear the pinion gear. We then mill a second through slot in the middle of this slot that acts as a clearance hole for the motor shaft.

You can then slide the motor onto the plate, and use an arbor press with any sort of pin to push the pinion off of the motor.

This has worked pretty well for us.

im having trouble visualizing this..... can you post a picture?

[Richard McClellan]

Originally Posted by Cory

Joe,

I too was unhappy to find that the banebots puller is useless, after buying it specifically for that purpose.

We made a plate awhile ago we use to remove it. It's a 1/2" thick aluminum plate, with a slot in it that goes most of the way through the depth of the plate, just wide enough to clear the pinion gear. We then mill a second through slot in the middle of this slot that acts as a clearance hole for the motor shaft.

You can then slide the motor onto the plate, and use an arbor press with any sort of pin to push the pinion off of the motor.

This has worked pretty well for us.

How do you fit a 1/2" plate underneath that little pinion? We only have about 3/16" of space or less.

[Cory]

Originally Posted by AdamHeard

im having trouble visualizing this..... can you post a picture?

I'll go take one right now.

[Travis Covington]

We made a plate a while back, and while pressing off a few FP pinions we bent the 1/2" plate!

We have since used a nut splitter/buster and would never use the pressing method again. The nut splitter works with a vice and and end wrench and snaps it off everytime without damaging the shaft. Can't reuse the pinion though...

You can get these at most hardware stores (Kragen, Napa, autozone, etc)

[Cory]

Ok, these are admittedly horrible pictures, but the lighting on my workbench is terrible.

The first shows the top view. You can see the large slot. The second shows a side view where you can see the second slot going all the way through the plate. It's currently occupied by a zip tie, but you get the point.

[edit] Just saw Travis' post. We too just use a nut buster, unless for some reason we need to reuse the pinion. In which case we use the plate. We also bent/broke the first plate we made.

[JB987]

Thanks for the great ideas, Cory, Travis and others...now if we could just find a source this year for fp motors Team 987 will be in great shape and looking forward to seeing you guys in Atlanta.

[114Klutz]

The easiest way is to simply point a heat gun at the pinion gear. Just pops right off.