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pinion gear removal

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Help! pinion gear removal

Post  DWRODZ Thu Aug 26, 2021 12:09 pm

Need pointers or advice in easy way to remove pinion gear from Cox/Cameron TD engines. Is there a special tool available? Don't want to ruin engine by doing it the wrong way
Thank you in advance
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Help! Re: pinion gear removal

Post  sosam117 Thu Aug 26, 2021 1:32 pm

Can you post a photo?
So I can see "IF" a std. gear puller would work?
I have some that are "C" shaped, and "box" shaped for many "hobby" uses.
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Help! Re: pinion gear removal

Post  Mudhen Thu Aug 26, 2021 2:09 pm

The pinion gear sits on a tapered crankshaft end. After removing the screw and lock washer, it should come right off.
If not, then either congealed oils glued it into place, or after several runs, (heat expansion,) the gear pressed farther on the shaft.
What I do is heat the gear with a butane torch, being careful to avoid the aluminum crankcase. Just get it warm/slightly hot to the touch.
Once heated, I tap it with a rubber mallet and it usually pops off.  If not, I heat it again.
This time I gently grab it with pliers, using just enough force to grip the gear.
Then I work the gear slightly clockwise/counter clockwise until it’s free.
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Help! pinion gear removal

Post  DWRODZ Thu Aug 26, 2021 4:16 pm

Thank you I will give that a try. In the interim I ordered a miniature hobby gear puller anticipating it will work.
Again thank you all in advance for your suggestions
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Help! Pinion Gear Removal

Post  DWRODZ Fri Aug 27, 2021 1:24 pm

Thank you I was able to remove the pinion gears easily following all the advice, a little penetrating oil and a cutting blade utilizing the cutting edge as a wedge to apply slight outward pressure and off they came....no special tools or puller just good old advice from those that have been there. Thanks again
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Help! Re: pinion gear removal

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