Pinion gears and need help

[cowboy1296]

Its time to change my gears. Once I tried to remove the pinion gear on the z motor I found it impossible to break the blue locktite on the allen nuts. I applied so much heat that the gear was smoking (not sure of the temperature). I even broke one nut and have tried 3 different times.

Should i use a propane torch for more heat?
Should I use a soldering iron for more pin point heat?
Should i try and soak the gear in acetone?
I dont like the idea of drilling out the nuts but would that work?

I am open for any suggestion that will work.

[Gary Campbell]

Cowboy...
Feel your pain... I've changed hundreds of them when I was doing service work for ShopBot. I always carried a good brand of 1/8" hex allen socket on a 1/4" drive ratchet to loosen the grub (set) screws, and an armature puller to remove stuck gears from the shaft. Heat from the torch helps

[cowboy1296]

I tried everything that i had. I even have a larger driver. I dont have a propane torch but do have the electric heat gun. I guess i will buy a mini propane torch. Have you ever had to drill out a nut?

[knight_toolworks]

now the pinion gears have smaller setscrews so it makes it even harder.

[Joe Porter]

Maybe an impact wrench (battery powered) with a good quality allen wrench mounted in a 3/8" or 1/4" drive socket?.....joe

[knight_toolworks]

Maybe an impact wrench (battery powered) with a good quality allen wrench mounted in a 3/8" or 1/4" drive socket?.....joe

that is a good way. I need to see ifI can find a small enough one for the new smaller pinion set screws.