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Farmall & IHC Tractors Discussion Forum
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826 vs 856- Same Drivetrain?

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Jim Allen

01-31-2007 18:39:29




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Would the brain trust agree that the 826 and 856 in the same era share the same drivetrain? I thought so but I'm getting arguments from a fairly knowledgible source near here that they are not. Niether of us can whip the books out to prove much one way other another, so I thought I'd run it by you guys? I did some homework on this. I see a few part numbers the same, but I don't have an 856 parts book to compare line for line.

He says they are similar but not the same in a lot of ways. I say they are "virtually" the same, meaning only a few minor details differ. I have bread and crow waiting. I'll wait to hear who gets to eat it.

Thoughts and details appreciated.

Jim Allen

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Jim Allen

02-01-2007 05:06:12




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 Re: 826 vs 856- Same Drivetrain? in reply to Jim Allen, 01-31-2007 18:39:29  
Well, if K.B.826 and The Tractor Vet agree, and the others concur as well, especially in light of the parts manuals, my next question is: Should I be kindly and allow my friend a little mayo on the crow sandwich, or should I make him down it dry!?

Anyway, thanks gents.

Jim Allen



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K.B.-826

02-01-2007 16:48:18




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 Re: 826 vs 856- Same Drivetrain? in reply to Jim Allen, 02-01-2007 05:06:12  
Well, I think I'd let him have a little mayo, since there are technically a few tiny differences on the early 856.



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the tractor vet

02-01-2007 06:56:58




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 Re: 826 vs 856- Same Drivetrain? in reply to Jim Allen, 02-01-2007 05:06:12  
Dry , plain and cold also ya my want to cut him with a dull knife and use either salt or turpintine on the wound .



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K.B.-826

01-31-2007 19:51:31




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 Re: 826 vs 856- Same Drivetrain? in reply to Jim Allen, 01-31-2007 18:39:29  
Jim, I did a little quick research in my parts books. I checked part numbers for the rear axles, axle bearings, bull gears, bull pinions, bull pinion bearings, ring gear and pinion, and differential bearings. All are identical between 856 and 826. I didn"t get into the range box or the speed transmission/TA at all, but I"m sure there are minor variations somewhere, probably most having to do with the early 856. Remember, the 856 came out about two years before the 826. Sometime during the producton of the 56 series, the angle of the teeth on a couple gears were changed. One was the hyd pump drive gear. I have heard a 1066 run with a 706 pump driven gear, makes a hell of a noise. I beleive all 826"s had the late-style gears. Another difference is the axle housings on an early 856. The bull pinion bearing quill is to the inside, requiring the rear axle housing to be removed if you need to service the shaft or bearings. The 826/late 856 have the quill on the outside, which is extremly nice as you can shim up the bearings easily if they get loose enough that the shaft takes out the seals and causes an oil leak into the brakes. Another difference- the axle housings were a totally seperate compartment from the rear end housing on the early 856"s. They had their own drain and fill plugs. They can be updated by removing the axle housings and drilling a 1/2" hole at the bottom of the rear end housing to allow oil out to the axles. Late 56"s and all 26"s had that hole from the factory.

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the tractor vet

01-31-2007 19:47:45




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 Re: 826 vs 856- Same Drivetrain? in reply to Jim Allen, 01-31-2007 18:39:29  
Basicly yes , now on a certain s/n break they did change the gear cut on the transmission gears . And this will hold thru the 1066 other then the center section as the 10 has a wider bell.



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Weldon K

01-31-2007 19:40:56




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 Re: 826 vs 856- Same Drivetrain? in reply to Jim Allen, 01-31-2007 18:39:29  
I have 756 and 856 parts catalogs.I do not have 826 catalog but I will take a look at the 826 catalog on-line when I can. 756 and 856 have identical parts numbers throughout the clutch housing and the rear end housing, including rear axles, rear axle carriers and PTO. I can not see any reason that 826 would be any different except for the Hydro models.

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trulyred

01-31-2007 19:19:43




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 Re: 826 vs 856- Same Drivetrain? in reply to Jim Allen, 01-31-2007 18:39:29  
I"ve worked on these tractors since 1970 and the differences between these two tractors is small. The differences in all the drive trains from the 706 thru 1486 and the smaller 88 series is mainly in bull gear and bull pinion width, axle size, and the 12" or 14" clutch. Improvements and updates over the years has been mainly in bearings,ball brgs. to roller brgs. shaft sizes and those type of changes.

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wolfman

01-31-2007 19:19:27




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 Re: 826 vs 856- Same Drivetrain? in reply to Jim Allen, 01-31-2007 18:39:29  
I have a gear drive 826 (92 pto hp); My neighbor has an 856 (100hp). 358 engine vs 407. Never checked any casting nos, but they look the same. I do know the 826 replaced the 756-matter of fact, they were going to call it the 756 Series II. The 826 has bigger engine ,taller radiator; came off same assembly line as 856 in one of the Quad cities(?Rock Island??); At the time due to the hydro option they beefed up the 756 (826) and the 856 (1026) but kept producing the 856 along with the 826 & 1026. I think back then they wanted match-ups for the 4000, 4020 and 4320 or such. Maybe the other way around- John was trying to match red.

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caseyc

01-31-2007 19:00:15




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 Re: 826 vs 856- Same Drivetrain? in reply to Jim Allen, 01-31-2007 18:39:29  
i'm sure someone with more experiance will chime in with a more educated answer but i'm gonna say they are not the "same" as you put it. i believe the 856 is around a 100hp and the 826 is in the 80-90 range if that. i'm sure the concept is the the same, but i would think the 856 would be a bit more stout, assuming we're comparing gear drives be cause the 826 was a popular hydro while i don't think the 856 was available in a hydro.

casey in SD

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