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#1
11-01-2020, 01:54 AM
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Which port is the original on this QQ42A 90 Degree Gearbox
I've got a QA42A snow thrower, and it has the gear box with the cast cover plate with the threaded port in it to add gear oil. However, my plate has 2 threaded ports in it, at different heights. I assume one of the ports was added by a previous owner.
So my question is, which of the two ports is the original port that I should fill the fluid level to. The lower or upper port? I'm in the process of putting a new bearing and output shaft in the gearbox, as the current shaft keyway was FUBARed pretty good. When I'm done, I plan to fill the box with 80w-90 Gear Oil. I'm just wondering which port is the correct port for the fluid depth. Pictures attached. 
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#2
11-01-2020, 11:06 AM
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Are you sure it is a qa42a? There are no plugs on my 2.
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#3
11-01-2020, 11:24 AM
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Quote:
The QA snowthrower manual makes mention of either a sealed gear box or one with an oil level plug. It seems from my research that the gear box with the oil level plug is less common, as I only see photos of stamped steel cover plate gearboxes online. These are the grease filled sealed units I believe, vs my unit that is meant to have gear oil in it. My understanding was that stamped steel cover plates were on the sealed grease filled boxes, and the cast plates with drain plug were on the gear oil filled boxes. I have the latter, but my cover plate has 2 plugs, so I'm curious which fill port is the correct gear oil level. Page 16 in the manual linked below. http://ccmanuals.info/pdf/QA%2036A%2...s%20Manual.pdf Here's some more photos of my snow thrower as well. Its a 4 paddle thrower, so I do believe its a qa42a.
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#4
11-02-2020, 11:27 AM
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Well I found this listing for a qa36/qa42 gearbox with some pictures. Listing seems to be gone but the photos remain, and it appears that the lower plug is the original plug.
https://picclick.com/Cub-Cadet-QA36-...550052215.html I'll embed the photo too incase the link above goes down. Anyway, I'd guess that the previous owner of my tractor added another port to simply make filling it with new grease easier? Open both ports, fill form the top until fluid drains from the lower. Figured I'd post the findings here incase anyone else was looking into something similar.
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#5
11-02-2020, 09:23 PM
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That is the older style gear box.
Some ppl use 80/90 gear oil, others use corn head grease, still others use a 50-50 mix of both. I always figures if it don't leak you can use the gear oil, if it leaks, pack it plum full of grease. 
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#6
11-03-2020, 08:46 AM
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Quote:
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