8050 Transmission Oil
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=154432
Printed Date: 15 Jan 2025 at 9:43am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 8050 Transmission Oil
Posted By: Johnwilson_osf
Subject: 8050 Transmission Oil
Date Posted: 01 Oct 2018 at 11:22am
All,
I am trying to chase some missing hydraulic Fluid. We were chopping corn the other day, and at lunch we checked the oil levels in the tractor. The Transmission was showing at the Add mark for 2WD, which is low for 4WD (this is a 4WD PD tractor). We topped the transmission off, and continued on the rest of the day. Checked it that night, and it was in the 4WD zone.
A day later, we look again, and the level is down into the 2WD marks on the stick.
I am loosing Oil, but I cannot figure out to where. There is no puddle on the ground under the tractor.
If there was a dipstick in the rear end, would I see it rising? Are there other places for the Transmission to leak into that I would not be able to see?
Thank you,
John
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Allis Express: Eastern PA on Rt 80
8050, 8010, 6080, 190, D14, DA 6035, AA 6690, 5650, Gleaner F2
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Replies:
Posted By: hillmonkey
Date Posted: 01 Oct 2018 at 12:00pm
CK all of your other fluids,one of them will be high. That is where its going.
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Posted By: DrAllis
Date Posted: 01 Oct 2018 at 12:36pm
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If the oil is truly disappearing from the dipstick to the transmission, it is either going into the rear end (sight glasses) or on the ground. It isn't evaporating. Checking oil level first thing in the morning with the tractor sitting LEVEL is the best way to check.
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Posted By: Johnwilson_osf
Date Posted: 01 Oct 2018 at 4:21pm
Thank you. When I check the tractor next, I will build a dipstick for the rear end to see if I can watch the level rise.
I will make sure that the tranny stays full, but is there any problems with having an overfull rear end?
Also what sort of repair would be needed to stop this leak, if it is into the rear end?
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Allis Express: Eastern PA on Rt 80
8050, 8010, 6080, 190, D14, DA 6035, AA 6690, 5650, Gleaner F2
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Posted By: MACK
Date Posted: 01 Oct 2018 at 10:24pm
Save your time building a dip stick for rear end. There is a splash plate below fill hole that will keep you from putting a dip stick in.
Screw top sight glass out for oil level.
Most likely place for transfer is in gear pump and pump drive shaft seal behind pump. MACK
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Posted By: injpumpEd
Date Posted: 02 Oct 2018 at 12:48pm
so when they transfer oil due to internal leakage at pump seal, it goes from trans to rear end? Not rear end to trans? Been keeping an eye on the oil levels on the new to me 7040.
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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Posted By: Big Orange
Date Posted: 02 Oct 2018 at 1:38pm
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The seal just in back of the georoder pump is probably bad, and pumping oil to rear housing.
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Posted By: Johnwilson_osf
Date Posted: 14 Jan 2025 at 3:14pm
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Greetings Allis Family, The tractor is leaking again. When this originally happened (2018), I replaced all the seals in the Gerotor pump. Put the pump back in, and had no problems until this week. I am loosing fluid from the transmission to the rear end again.
Let's assume that when I rebuilt the pump, it was done perfectly. I see either two options. Option 1: The seals failed and I need to do it again. Option 2: There is another location for the leak.
Is there any way to identify where the leak is happening? Is there a way for me to plumb the rear end into the transmission to refill the lost oil?
I already have one tractor split, getting a new engine and clutch, so I am not ready to do this one.
Thank you John
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Allis Express: Eastern PA on Rt 80
8050, 8010, 6080, 190, D14, DA 6035, AA 6690, 5650, Gleaner F2
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Posted By: DrAllis
Date Posted: 14 Jan 2025 at 5:19pm
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A non-AGCO set of hydraulic filters under the belly can cause high suction at the gear pump placing that shaft seal under more stress. I'd go for the same shaft seal at the gerotor pump being the culprit (again). When installing that seal, I always wrapped the splines on the shaft in barber pole fashion with one layer of electrical tape. Oil with WD40 and slide the seal over the splines without damage to the seal during installation. I have a friend who fought a 7020 tractor for this and he finally installed that gerotor seal BACKWARDS and claims that solved his problem. By installing the seal with the spring to the rear really helps keep the steering pump from sucking transmission oil thru it.
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Posted By: steve(ill)
Date Posted: 14 Jan 2025 at 7:16pm
Dr...... is there a problem connecting the two DRAINS with a hose ? What would be the "level" ?
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Like them all, but love the "B"s.
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