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Discussion Starter #1
Hello,
I recently acquired a 28" MA208 snowblower for my 1972 L8 walk behind and the following two questions.

The snow shoot deflector goes all the to the left and up the top dead center, but not to the right. Is there a simple adjustment for that?

I'm not sure, but it seems like my auger is potentially installed backward. I say that because when I turn the pto, the 'sharp end' of the auger blade does not turn forward, but the section with the scope does? I loaded a few pictures that might explain that better.

thanks,
Pete
 

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The augers should feed the snow towards the middle of the machine where the impeller catches it and shoots it out. One of the augers is installed backwards.

To adjust the orientation of the outlet chute, you rotate the control arm until the cable is in the middle of its adjustment,you can then loosen the bolt on the chute rim that holds the cable nd move the chuts until it is pointing forward.

m
 

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Yes, that auger is in backwards. It won't work well like that, the auger will push the snow away from the impeller, rather than into it.

What happens when you keep turning the chute to the right? It jams up? I'd try loosening the wear strips top and bottom, and wiggling the impeller housing. It's easy for dirt and rust to get in there and gum it up.
 

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Discussion Starter #4
Thanks guys! Which auger is installed backwards? The left or right looking from the front? My head just spins when I look at them!
 

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Both are backwards

It's relatively easy to fix. Unbolt the bearing mounts from the sides of the housing. Disconnect the worm gear box at the driveshaft. It will either be a splined coupling or a u-joint pinned to the shaft. Remove the auger halves from the hex shaft. Swap them, keeping inside-to-inside, and outside-to-outside. Button everything back up.

While you're at it check/set the torque on the big nuts which hold the auger sections on. Those nuts control the pressure on the clutches which drive the auger. It's important to get that right, so as not to damage the worm gear, if a branch or rock gets in there.
 

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Discussion Starter #6
Guys thanks for the input, it was very helpful. Since I had the auger off I decided to refresh the bearings and seals in the worm drive gear box as it was leaking. In addition to one of the needle bearings falling apart, I noticed the worm gear to be relatively worn. I know it is a weak spot in the drive train and was wondering if there is a good source for new or used worm gears? Also, is there an easing way to get the needle bearing out of the end cap casting?

Thanks again,
Pete
 

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That's showing some wear, but I think is still serviceable.

I'd turn it around and keep running it.

Used worm gears do show up on for instance ebay every once in a while. It's been a few years since I've seen an NOS one. That one is in my parts stash :) You can also ask Richard's; they've often got all kinds of things squirreled away.
 

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Discussion Starter #9
Thanks jrd,
To turn the worm gear around, I’m assuming it can be tapped or pressed off the shaft to turn it around? Is only a shear key which holds the position of worm gear on the shaft?

Thank you,
Pete
 

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Thanks jrd,
To turn the worm gear around, I’m assuming it can be tapped or pressed off the shaft to turn it around? Is only a shear key which holds the position of worm gear on the shaft?

Thank you,
Pete
The gear just slides on. There's a key (woodruff, IIRC) but that's it. Slide it off, turn it over, slide it back on. When assembled, the gear is located on the shaft by some big shims/washers.

I can't remember the dimensions of the shaft w/r/t the gear. It might be that you can turn the whole shaft and gear assembly around. I *think* the gear is offset on the shaft for some reason. If my memory is correct, you might be able to just slide the gear over a bit and then turn the whole assembly around.
 
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