A-C Model D grader Fluids
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=206052
Printed Date: 31 Oct 2025 at 5:33am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: A-C Model D grader Fluids
Posted By: Allis Grader Guy
Subject: A-C Model D grader Fluids
Date Posted: 26 Mar 2025 at 8:47pm
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I recently bought an A-C Model D grader (Serial #3789 with WD-45 engine) and am planning to change all the fluids. The maintenance manual gives the following grades of oil and fluids for the various systems: Engine oil: 30W Trans, Rear axle & Tandem: 50W Hydraulic system: 10W Steering gear: 90 E.P. Does anyone know what are suitable fluids and oils, or where I can find a list of suitable replacements using current oils and fluids? Btw, the fuel specifications are to use 60 octane or higher for regular loads and 70 octane or higher for continued heavy loads!! I may have to start adding some water to the gas to get the rating down. Also, is it better to use alcohol-free gas, or is 10% ethanal gas OK? Thanks, Jim |
Replies:
Posted By: steve(ill)
Date Posted: 26 Mar 2025 at 8:58pm
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Most people will switch over to 10w30 for the engine oil. You can still buy 50 wt oil for the trans / axle..... Viscosity is the same as ISO 220 Hydraulic oil if you have better access to that.... also 90wt GEAR LUBE is the same VISCOSITY, but dont mix Gear oil with Hydraulic or engine oil ... not the same stuff.  10 wt hydraulic oil you can use Hy-Trans , SAE 10 engine oil . AW 32 or 46 hydraulic oil.. what ever the local supplier / FArm Store / NAPA handles.  90 EP is extreme pressure GEAR LUBE ... available everywhere.
------------- Like them all, but love the "B"s. |
Posted By: Codger
Date Posted: 26 Mar 2025 at 9:15pm
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ISO-32, AW-32, SAE10W are basically the same in hydraulic oil and if you'll run the grader in the cold winter months it will be preferred. I like ISO-46, AW-46, or SAE20W all year round as it still flows good cold, but is a bit better in the warmer months. ISO-68, AW-68, SAE30 only in the warmer months. As Steve stated SAE50W and 90W gear lube are the same viscosity but not the same constituent product package. If changing complete, either will work well but don't mix. I would switch to 10W-30 engine oil but that is what I've ran in most gasoline engines since 1975 when I started driving. ------------- That's All Folks! |
Posted By: Allis Grader Guy
Date Posted: 28 Mar 2025 at 2:15pm
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Thanks to both of you, that is exactly the information I needed before I went messing around with it. |
Posted By: steve(ill)
Date Posted: 28 Mar 2025 at 4:09pm
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Illinois has been selling 10% ethanol for 40 years.. Not sure you can even buy "ethanol free" anymore in this state.. Maybe a few locations, but not common.. I have been using the 10% in old farm tractors, trucks, car, chain saw, mower... etc sinc 1988. -- or before. ------------- Like them all, but love the "B"s. |
Posted By: Allis Grader Guy
Date Posted: 28 Mar 2025 at 5:04pm
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That's good to hear as I have been using 10% in my M-F TO 20 for a few years, so feel better about using it in the grader now too. We can get ethanol-free here in Denver, but it's crazy priced. May have to opt for the 91 octane as engines lose 3% power for every 1,000 feet above sea level. So at 8,000 feet at the river property, I lose about 24% power. You really notice it when towing over mountain passes or using the Honda 3000i generator. The grader was transported a couple of weeks ago so I am ready to start tweeking it and making it pretty! It is in pretty good shape as I believe it was used by a county in southeast Colorado and taken care of. There is no tag on the engine block, so it was probably replaced years ago. It has Power steering, blade circle, and leaning front wheels, strong clutch and brakes, 12 volt system, 12 foot blade, heater in cab, rear hitch, and all the glass is good. It will just get used to maintain the road to the property as the county says the road is not theirs. I have some pics but will first have to get them below 2 MB to post them.
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Posted By: Allis Grader Guy
Date Posted: 28 Mar 2025 at 5:48pm
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OK, here are the pics. Never mind, still haven't figured out how to post them even when below 2 mb. |
Posted By: steve(ill)
Date Posted: 28 Mar 2025 at 6:41pm
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below the last post on a topic, click on the POST REPLY box... left side of page.. You will get a pop up window ... There is a GREEN TREE ICON on the heading of that pop up box.. Click on that... then CHOOSE FILE....go to your DESKTOP or where ever and choose the photo ( should be 800 x 600 pixels).... then UPLOAD that and it will show in the right side of the box... then click OK and it will post..
------------- Like them all, but love the "B"s. |
Posted By: Allis Grader Guy
Date Posted: 28 Mar 2025 at 7:20pm
OK, so I should have used the Post Reply on the left side instead of Reply that is on the right side of the page.
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Posted By: Allis Grader Guy
Date Posted: 28 Mar 2025 at 8:12pm
Pic 2
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Posted By: Allis Grader Guy
Date Posted: 28 Mar 2025 at 8:13pm
Pic 3
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Posted By: Allis Grader Guy
Date Posted: 28 Mar 2025 at 8:15pm
Pic 4
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Posted By: Allis Grader Guy
Date Posted: 28 Mar 2025 at 8:16pm
Pic 5
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