It's Aliiiive!! Crusty Ol' MTD Comes to Life - Snowblower Forum : Snow Blower Forums
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post #1 of 15 Old 11-28-2015, 10:09 PM Thread Starter
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It's Aliiiive!! Crusty Ol' MTD Comes to Life

Hi again folks - a major milestone to getting my first two-stage blower back in action.

Just finished a carb rebuild, tank cleanout and fuel line replacement on the 1988 Tecumseh HM80 that is re powering this unit. Added a little inline fuel filter for good measure.

When I brought her home a couple weeks ago she wouldn't idle, was surging all over the place, and was generally showing signs of serious neglect. Carb was a gooey blob under a thick layer of gunk (as was most of the engine, actually...)

Still got a ways to go, but today was a nice victory...


1980ish MTD Snowflite 24" w/ 1988 Tec HM80 (undergoing recommissioning)

1952 Ferguson TEA20 Tractor
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post #2 of 15 Old 11-28-2015, 11:03 PM
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sounds great, whats next for the re-comish?
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post #3 of 15 Old 11-29-2015, 12:11 AM Thread Starter
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Thanks!

Next steps? Well, pulled the gear case pan off after that brief run....



and, besides the acorn and sheared bolt collection (!?)...found the friction material kinda chewed and gunked up...




That right there may be a clue to lack of forward mobility I'm thinkin.

Looks fairly straightforward to pull out. Do you know if they are generally a standard size?

Between getting that replaced, adjusting the drive engagement cables and the chute back on, should technically be ready to blow snow. Probably will change the oil once more now that some fresh stuff has had a chance to swish about a bit. Probably have a look at the belts, and I wouldn't mind replacing the scraper too. It's really chewed up. I think the tires will last another season but some bigger nobbies are definitely in the future plans.

Aside from that stuff, think I will just use it looking as is this winter and worry about making it purdy come the warmer weather. Had the carb rebuild failed to sort the rough running I probably would have started tearing into the engine a little more drastically to see what was up.

1980ish MTD Snowflite 24" w/ 1988 Tec HM80 (undergoing recommissioning)

1952 Ferguson TEA20 Tractor

Last edited by brassmonkey; 11-29-2015 at 12:57 AM.
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post #4 of 15 Old 11-29-2015, 03:59 PM
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Engine sounds healthy, that's about as smooth as a Tecumseh will get. It idles nicely, half throttle and wide open sound good.

The friction wheel is pretty common, it's about 5" IIRC. They were used on a lot of MTD models for a number of years.
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post #5 of 15 Old 11-29-2015, 04:07 PM
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OUCH, that poor friction wheel has powered that machine through a lot of snow. Time for retirement.

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Make sure the windows are up before the snow plow goes by !!

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post #6 of 15 Old 12-05-2015, 01:06 PM Thread Starter
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Thanks for the encouragement guys.

Agreed, new friction wheel badly needed!

So, voila - a reasonable 24 bones later, here's the replacement courtesy of my local small engine shop. Thanks Nick! (Interesting to note it was made in Canada. Didn't think any replacement parts were made on this continent any more...)


You will notice of course how much better the new friction material is. But also if you look closely you can see the new wheel is also a hair taller, probably due to the 36 years of compression and wear on the original. Taller equals more pressure on the drive plate and so more power to the ground. That's the hope anyway!




Going to clean up the greasy horror show in the gear case then get this new disk installed.

1980ish MTD Snowflite 24" w/ 1988 Tec HM80 (undergoing recommissioning)

1952 Ferguson TEA20 Tractor

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post #7 of 15 Old 12-05-2015, 11:49 PM Thread Starter
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As much as I wanted to just throw that new friction wheel in and test it out, I knew I'd regret not taking the opportunity to do some cleanup in that drive system housing.

Not really sure how so much grease got on so much stuff in there. 2nd pic in post #3 gives you some idea of how much goo was in there...Things that don't even need grease got greased! Either the various spinning parts flung it everywhere...or someone really like pulling the trigger on his grease gun!

Anyway - here's a shot after some work this afternoon. Made a dent in it anyway. Can actually see some metal again. I covered the friction plate to try and protect it from all the goo flying about while I scrubbed with a toothbrush and brake cleaner.



Sorry about the poor lighting. Just took it by the glare of the work light.

1980ish MTD Snowflite 24" w/ 1988 Tec HM80 (undergoing recommissioning)

1952 Ferguson TEA20 Tractor

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post #8 of 15 Old 12-06-2015, 07:53 AM
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Nice job cleaning it up in there

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Make sure the windows are up before the snow plow goes by !!

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post #9 of 15 Old 12-06-2015, 08:12 AM Thread Starter
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Thanks, K!

Going to degrease the sprockets and chains too so I can check for any serious wear.

Unfortunately I bent the blower's bottom crossmember a bit with my floor jack getting its rear in the air.

Hopefully it won't be too hard to straighten.

1980ish MTD Snowflite 24" w/ 1988 Tec HM80 (undergoing recommissioning)

1952 Ferguson TEA20 Tractor
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post #10 of 15 Old 12-06-2015, 08:32 PM Thread Starter
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Ok - innards mostly degreased (and judiciously regreased only where needed...) with the new friction disk installed. I also took a pretty noticeable bend out of the shift rod.

Chains and sprockets seem ok from a wear point of view but there is a fair degree of slop, with no obvious way I can see of adjusting the tension. Clues most welcome!



Interestingly, none of this work fixed my lack of first gear. What I have since discovered now that I understand a bit more about how this thing works is that the disk travel probably needs adjustment via that threaded brass collar connecting the shift rod to the friction disk shuttle.

I was fiddling with the selector in the driveway and concluded the thing is really in Neutral when 1st is selected, in 1st when 2nd is selected, and so on. And when Neutral is selected it is in R1. Have to play with that a bit more next weekend. The disk needed replacing in any case and Im glad to have cleaned out the gunk too.

Next job will likely be to free up the rusted bolts holding the scraper on. Also picked up some old conveyor belt material for the impeller mod that seems to improve throwing capability.

1980ish MTD Snowflite 24" w/ 1988 Tec HM80 (undergoing recommissioning)

1952 Ferguson TEA20 Tractor

Last edited by brassmonkey; 12-06-2015 at 08:45 PM.
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