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Old 09-29-2010, 04:47 PM
mtnflyguy mtnflyguy is offline
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A little mechanic help please! :)

I have an older bobcat zt100 mower. There is a gear box that has sheared off 3 of the 4 bolts. I need to be able to take this box out in order to fix it. However, for me to do that I have to remove the wheel that is attached to the shaft coming from the box. (The wheel drives one of the belts.) I have removed all the obvious points, such as allen screws and such. There is appears to be a square pin that may or may not need to be removed? (See the picture below.) Anyway, I just need to know how to remove this wheel. Thanks for you help!
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Old 09-29-2010, 04:49 PM
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punt66 punt66 is offline
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sorry, i dont know any little mechanics
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Old 09-29-2010, 05:01 PM
clc19chase clc19chase is offline
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its most likely siezed on there because of rust. get something that penetrates such as wd 40 or an aerosol spray called "open and shut" and let it soak. your going to probably need a puller.
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Old 09-29-2010, 05:05 PM
lm406hp lm406hp is offline
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You need a gear puller, a little penetrating may help also. If that doesn't work some heat will. The keyway is there to keep the pulley from spinning on the shaft and it can stay on the shaft but it may fall out don't lose it.
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Old 09-29-2010, 05:14 PM
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cgaengineer cgaengineer is offline
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Use a bit of heat on the pulley and a dead blow hammer. If you hit it a few times it should break the rust free and come right off, due to the location you may actually have to pound it further on the shaft, hit the end of the exposed shaft with some emory cloth to allow the pulley to slide off.

Do not hit the rim of the pulley, hit as close to the center as possible...you may have to use a block of wood. Once the pulley is lose you can "walk" it off the shaft.
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Old 09-29-2010, 05:18 PM
pugs pugs is online now
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Careful with a puller...that pulley will probably just bend.

Careful with heat if you plan to reuse the gearbox. Dont want to mess up the seal or bearing behind the pulley.

Make sure they didnt use double set screws. Sometimes they put one under the other to basically lock the first one in.
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Old 09-29-2010, 06:10 PM
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puppypaws puppypaws is offline
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Quote:
Originally Posted by mtnflyguy View Post
I have an older bobcat zt100 mower. There is a gear box that has sheared off 3 of the 4 bolts. I need to be able to take this box out in order to fix it. However, for me to do that I have to remove the wheel that is attached to the shaft coming from the box. (The wheel drives one of the belts.) I have removed all the obvious points, such as allen screws and such. There is appears to be a square pin that may or may not need to be removed? (See the picture below.) Anyway, I just need to know how to remove this wheel. Thanks for you help!
Soak with this 48 hrs., keep it covered, use a gear puller, should come off without bending, if not no big deal, pulley is cheap.

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Old 09-29-2010, 06:14 PM
mtnflyguy mtnflyguy is offline
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Thanks!

Thanks everyone! I have been soaking in pb blaster and that hasnt done it yet, although I didnt cover it. I will try a little bit of heat and see what we can do. Thanks again!
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Old 09-29-2010, 06:17 PM
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cgaengineer cgaengineer is offline
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The heat will do it, you don't need much.
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Old 09-29-2010, 06:18 PM
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puppypaws puppypaws is offline
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Originally Posted by mtnflyguy View Post
Thanks everyone! I have been soaking in pb blaster and that hasnt done it yet, although I didnt cover it. I will try a little bit of heat and see what we can do. Thanks again!
I meant keep it soaked, not lay something over it. You can apply pressure with a gear puller and add a small amount of heat while someone tightens the puller, it want take much.

Let us know how it goes?
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