Ad 30 grader gear box oil?
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=180673
Printed Date: 25 Aug 2025 at 5:49pm
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Topic: Ad 30 grader gear box oil?
Posted By: Marcvg
Subject: Ad 30 grader gear box oil?
Date Posted: 21 May 2021 at 7:32pm
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I have an ad30 waiting on service manual, does anybody know what oil to use in all the gear boxs? I can't find any info on web ,thanks
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Replies:
Posted By: Coke-in-MN
Date Posted: 22 May 2021 at 10:36am
On my old Adams grader I used 600W steam cylinder oil from Mobile - used it in most gearboxes in production job I had and figured it was easy to obtain back then and worked well
600W Oil was used in Model A transmissions, differentials and steering boxes when they were first manufactured. It was the oil weight of Henrys choice and it must have done its job as so many Model As have survived till today. ... Transmissions and rear differentials were using 90 weight.
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Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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Posted By: Marcvg
Date Posted: 22 May 2021 at 12:00pm
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Thank you sir , do you think 80/90 would be OK to use
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Posted By: Ian Beale
Date Posted: 22 May 2021 at 5:25pm
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FWIW
For an AC 45 the lift boxes use SAE 90 EP non-corrosive
Transmission and drive above 32 F SAE 50 engine oil, SAE 30 if below
Power control box SAE 30 engine oil
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Posted By: steve(ill)
Date Posted: 23 May 2021 at 1:04pm
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i agree with Ian on the original spec....... ... and the ISO 600 cylinder oil that COKE mentions, is equivalent to SAE 140 gear lube.
-..50 wt engine oil ( WITHOUT ADDATIVES) is the same viscosity as SAE 90 gear lube.
I think using 90wt gear lube in all the boxes, might be a good idea this day and age.
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Like them all, but love the "B"s.
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Posted By: CAL(KS)
Date Posted: 24 May 2021 at 8:00am
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i run 80-90 in diff and blade gearbox on my 145T. the transmission i run hy-tran because it has a pump and filter, dont know if the older models have that.
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Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20
Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15
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Posted By: Ian Beale
Date Posted: 24 May 2021 at 9:41pm
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Cal
IIRC an Ac 45 doesn't have that
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Posted By: Coke-in-MN
Date Posted: 25 May 2021 at 5:57pm
600W is rated 90wt and rated for gearboxes - but is a little more expensive than automotive 90wt - then supplier I got industrial products from had some good deals back then for all the products I bought for industrial use - Same as DTE oils I used in compressors , hydraulic units and other areas that called for a high grade lubricant .
I used the DTE Light in snow plows also as it had a good flow rate in MINUS temps
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Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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Posted By: ghostriderinthesky
Date Posted: 14 Jun 2021 at 11:48am
use the mineral oil 90 weight and not the EP 90 weight for original spec. i am unsure if the transmission has any yellow metal in it or not so just be safe.
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