Quote:
Originally Posted by PaulFarrand
yes, the pinion is stuck on the motor as the pinion screw is threaded.
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All pinion screws are threaded, they come that way from the factory.
The options for breaking them are stripping the thread or rounding out the head. Looks like you've rounded it.
You can drill out the grub screw if you have a drill press and some decent bits, trying to do it by hand is a pain, but can be done. Pinion will probably be toast.
Slightly larger hex key can work (sometimes the next size up imperial can work, or a larger torx bit, might need pressing/tapping into the grub screw though.) Or cutting a slot as above.
Heat will do it if it's an aluminium pinion (thermal expansion of aluminium is much greater than steel. I've done it with one of those turbo lighters. It almost fell out with the lightest touch of the hex key.)
Simplest option, if you can wait (or have one to hand), is the pinion puller as above.