JD 826 - gear oil or 5W20 in auger gear case? - Snowblower Forum : Snow Blower Forums
 
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post #1 of 7 Old 03-22-2018, 08:00 PM Thread Starter
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JD 826 - gear oil or 5W20 in auger gear case?

I've got an old John Deere 826. I needed to replace the 3 bushings on the ends of the auger shafts, especially the one between the impellor and the pulley, so I drained the gearcase to check condition of those bushings as well - they were OK. Now I need to refill, so I checked the service manual everyone links to, TM1234 from July 1981. On page 16 of the manual, in the specifications section, it says you should use a GL5 gear oil. Then, on page 167, it says you should use 5W20 engine oil. The oil I drained out smells like gear oil, but moves like engine oil - so either it's worn to either stink or be more fluid, or it's been mixed over the years. If you don't want to read the whole manual, I uploaded those two pages here: https://imgur.com/a/cd59T Which do I use???

Here are pics of my machine, sorry I didn't take any "overall" shots.



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post #2 of 7 Old 03-22-2018, 08:43 PM
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I have the same machine and wondering the same question before you posted. I think you or I will need to call an old established John Deere dealer for the answer. Since it's long out of warranty I'm afraid the answer you might get from one of the younger mechanics is the wrong one! Unfortunately.

If you go with gear oil, I would use Synthetic, it doesn't thicken in the cold.

I plan to drain mine and have been wondering what will come out.

1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
Noma 9hp, 27" w. 12" impeller
Noma 5hp, 24" w. 12" impeller, 20" high front
Gravely Convertible, 12hp Kohler cast iron, 26" width, 600 lbs of cast iron & steel, 2 speed impeller, 4 ground speeds
Dynamark 8hp, 26", 12" impeller, for sale
Several other 5hp, 8hp, several 2 cycle, all for sale
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post #3 of 7 Old 03-23-2018, 02:04 AM Thread Starter
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I already picked up a bottle of 75W90 synthetic, and I'm leaning towards using it. My theory is that using 75W90 when it should have 5W20 should only result in more drag in the gearcase, but vice versa could destroy the gears.

EDIT: Just found the pdf owner's manual, which also says 5W20. So I guess I need to pick up more oil.

Last edited by justcoz; 03-23-2018 at 02:22 AM.
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post #4 of 7 Old 03-23-2018, 11:15 AM
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I have a call in to my local JD dealer and depending on their answer, I may call others also.

IMO, I'm a proponent of synthetic: if it's engine oil,, synthetic; if it's differential gear case, synthetic, absolutely; brake fluid, synthetic; but not necessarily synthetic for transmission fluid as sometimes it's manufacturers required such as my wife's 2005 Toyota RAV4; BUT for JD gear case if 5w20 I would feel more comfortable using dino oil, not synthetic, for the dino's viscosity.

1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
Noma 9hp, 27" w. 12" impeller
Noma 5hp, 24" w. 12" impeller, 20" high front
Gravely Convertible, 12hp Kohler cast iron, 26" width, 600 lbs of cast iron & steel, 2 speed impeller, 4 ground speeds
Dynamark 8hp, 26", 12" impeller, for sale
Several other 5hp, 8hp, several 2 cycle, all for sale
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post #5 of 7 Old 03-23-2018, 12:03 PM
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I called a John Deere dealer since 1952! Talked to an old guy Service Manager. He knows what I'm talking about, didn't need the model number, had one question, cast iron gear box? Yes. Gear oil! He recommends synthetic gear oil because it's superior. Absolutely.

He continued and said if it's cast iron gear box in any model it's gear oil; if it's aluminum, it's grease, unless it's Honda they use a special lubricant.

I told him I have an original quart, several, of John Deere labeled GL-5 gear oil from 1983. Should I be using that instead of synthetic? He said it's still good and you can use it and it will be fine but he still recommends the synthetic gear oil because it's superior.

I had a call from another old time John Deere dealership in response to this question. He use to sell the real John Deere's, then John Deere stopped making them for a couple of years before Ariens took over and Murray. He wanted to carry a quality brand so he started carrying Ariens as his brand. He said the same as the dealer above, gear oil, and cast iron is gear oil; aluminum cases use grease.

Interesting tidbit, John Deere never made snowblowers, Ariens made them under the John Deere design, different than their own putting the JD stickers/labels on. Then John Deere wanted to buy the Ariens company and they did not want to sell so something happened and Ariens did not make snowblowers for John Deere anymore. A few years later Ariens made then but under the Ariens design though some years it was a combination of Ariens and JD designs, using both company's parts! What a mess. Then at some time Murray took over and started making them putting the JD label on them.

1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
Noma 9hp, 27" w. 12" impeller
Noma 5hp, 24" w. 12" impeller, 20" high front
Gravely Convertible, 12hp Kohler cast iron, 26" width, 600 lbs of cast iron & steel, 2 speed impeller, 4 ground speeds
Dynamark 8hp, 26", 12" impeller, for sale
Several other 5hp, 8hp, several 2 cycle, all for sale

Last edited by JLawrence08648; 03-23-2018 at 01:49 PM.
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post #6 of 7 Old 03-23-2018, 01:31 PM Thread Starter
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I called my local dealer as well. No "old hand"s available, but service advisor said to use gear oil. So I think I'm going to use the gear oil.
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post #7 of 7 Old 03-23-2018, 01:43 PM
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You can get GL4 / GL5 gear oil in yellow metal safe blends. Castrol has it.. Penzoil has it.. and Walmart Supertech.. some stores carry the version that is safe. You just need to read the labels.
I don't think it's a big deal but if you want to try and get a few more decades out of the old girl having the yellow metal safe formula/additive will protect that bronze gear better.

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

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