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Allis Chalmers Discussion Forum

175 allis transmission

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bob couchman

05-25-2009 10:26:07

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got a service manual for my 175. it ststes that power director, hydraulics and pwr strg are in fromt case and separate from trans and final drive. pwr director to use atf type a and transmission to use gear oil but doesnt state sae wt. does this sound right and what wt gear oil would i use.

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cadet trooper

05-26-2009 16:35:09

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 Re: 175 allis transmission in reply to bob couchman, 05-25-2009 10:26:07  
Basically AC 715 oil is for hydraulic only not recommended for the rearend because of gear pressure the AC 821 is both so I would err on the safe side and use 821 on both ends if a question. The 821 is more EP or extreme pressure as in between gear mesh for pressure lubing systems. The only problem I can see is slow hydraulic movement in cold weather until it warms up. We're talking severe cold as in minus 5 to 10 below.

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05-27-2009 04:26:17

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 Re: 175 allis transmission in reply to cadet trooper, 05-26-2009 16:35:09  
Cadet Trooper - I disagree with you on the 715 being a hyd oil, it is not a hyd oil but a gear lube. The 821 is the hyd oil.

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cadet trooper

05-27-2009 16:45:05

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 Re: 175 allis transmission in reply to IndinanaTom, 05-27-2009 04:26:17  
Could be it's been a long time ago but most all the later series tractors 7000 thru 8000 used 821 only throughout the system even my compact 5020 does too. The memory is kind of a cruel thing I've learned over the years to never bet on it if I did I'd be poorer than I am now. :-> I do know that when we would get in a new 7000 series tractor the sightglass oil color was green to help locate leaks and make sure the first oil change was done for a warranty issue. The 8000 series put a dye in the freon to track leaks I believe it was green also but maybe red I can't remember. Anyway if someone has a 175 Op manual it should clear it up. I don't know if you can buy 715 anymore I do know it looked and smelled like ATF. IMHO

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05-26-2009 15:44:41

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 Re: 175 allis transmission in reply to bob couchman, 05-25-2009 10:26:07  
Bob, Had to pick up some lube for my 175 rear drive as one side was low. Went to AGCO dealer and this ended up being SAE 80-90W. Hope this helps you.

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05-26-2009 08:17:29

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 Re: 175 allis transmission in reply to bob couchman, 05-25-2009 10:26:07  
That"s the difference between an op manual and a svc manual. Op manuals have the lube info because every operator should know that. Svc manual has the R&R info, but not all people do that type of work.

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05-25-2009 17:45:32

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 Re: 175 allis transmission in reply to bob couchman, 05-25-2009 10:26:07  
Per my 175 operator's manual Hyd & Transmission uses AC Power Fluid 821 which I believe is same specs as I use in mu AC 7040. The Final Drive Oil calls for AC Power Fluid gear lube 715. There may be some generic lubes but not sure what they would be. I have added trans & hyd oil but not gear lube in my 175.

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bob couchman

05-25-2009 17:51:31

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 Re: 175 allis transmission in reply to IndianaTom, 05-25-2009 17:45:32  
by final i meant differential which is in rear housing with the transmission. front case houses hydraulic fluid and power director. i have run and still do run atf in transmissions in cars and transfercases in 4x4's. it tolerates heat better than gear oil. also the clutch pack in the power director would be like the friction pads in an auto trans.

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Bob Bancroft

05-25-2009 14:06:58

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 Re: 175 allis transmission in reply to bob couchman, 05-25-2009 10:26:07  
Is that an OEM service manual? I only remember some late D17's and early 180's shipped with red oil. I would use hyd/trans oil in both fill holes. Just don't get any of that thin cheap junk. What you want should meet CNH, JD, AGCO,-basically everybody's standards.

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bob couchman

05-25-2009 15:01:52

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 Re: 175 allis transmission in reply to Bob Bancroft, 05-25-2009 14:06:58  
now it has red oil in back transmission hole and hy-trans in front pwr director case. i know that aint right. its an I&T manual. after market.

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