Ariens snow blower. Cannot get fan hub off the worm gear shaft.
I have every thing apart , except I cannot get the fan hub off the worm gear shaft. The two roll pins are out. It seems the shaft and hub are rusted from years of service. I have tried heating, soaking and hammering the assembly but nothing will move.
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You will need to remove the pulley #66 from the back of the unit, the bearing retainer #1, and the auger bearing bolts #18. The whole unit will then slide out of the housing. You can then remove the augers and then take the worm gear apart. That will get you to the auger shaft.
there is a bolt that goes thru auger and spinning shaft (look for a hole where it once was) holds the augers to the spinning shafts, it is called a shear pin, it is a safety feature, and made of softer metal, so if you pick up something too hard with the auger, it wont lock up the engine, or break engine crank shaft.find an ariens repair shop to purchase the shear pin so you get the right softness of metal.
The most common cause of this is the drive belt is worn. If you remove the cover (usually plastic) in the middle of the snow thrower and look at the belt closest to the blower assembly. This is the blower drive belt. (Your operators manual will show you the location and how to remove the cover if you are unfamiliar with your snow blower) With the engine not running, have someone depress the drive lever and check the belt. You should only be able to depress the long side 1/2 inch or less. More than that the belt has stretched and needs to be replaced. On some older blowers you can adjust the tension pulley, but most made in the last 15 years, you can't. The belt may be frayed on the edges or glazed causing it to slip (it is shiny on the sides of the belt) You can get parts (the new belt) through your local Ariens dealer or jackssmallengines.com Feel free to ask any other questions. I know Snow Blowers. Please remember to rate this answer!
Hi, The blower spins at full speed? If it does the belt, pulley, and shaft are good. Look at the shaft from the fan to the gear box while it's running and that shaft should be turning at the speed of the fan.
If the blower spins at full speed and the auger doesn't the most likely problem is the worm gear transmission from the blower shaft to the auger shaft.
A good way to visually inspect this is: With the machine turned off and the spark plug wire unhooked go to the front and try to rotate the auger by hand. If the gear box is good you will only be able to move the auger less than an inch. If the box is bad you will be able to move the auger a lot farther. While you are there recheck your shear pins.
You can also remove the blower drive belt and have someone turn the pulley by hand while you watch the auger. Put resistance on the auger with your gloved hand. If the box is good the auger will move smoothly in you hand. If it is bad, it will ****, move roughly, or stop.
While the other person is turning the pulley and you have some resistance on the auger look closely at the shaft running from the gearbox back to the blower. On some models there is a connecting sleeve and the roll pin that connects the sleeve to the shaft and gearbox will break.
If the gearbox is bad, it will have to be replaced as a complete unit.
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I also had this problem. I actually pulled the ears off of the hub using 2 different pullers. I ended up heating the hub and hiting the shaft through the hub with a small sledge. It took 45 minutes. Then I tried to remove the impeller from the shaft. Not a chance! Both pins out but it would not budge. This is a customers machine and it needed a gearbox. I'm going to end up putting an impeller on it as I can't get it off the old shaft.
most likely you have a broken shear pin. Look on the side that works, there should be a bolt or pin through it. The side that is not working is probably broke off. Find the hole in the auger and line it up with the inner shaft and replace with proper shear pin/bolt. Shear bolts can be obtained from most outdoor power equipment shops. I do not suggest replacing with standard bolt as it can cause damage to you gear box it auger gets jammed.