Farm Equipment - HD4 hydraulic 10-30w ?

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HD4 hydraulic 10-30w ?

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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=33875
Printed Date: 06 Sep 2025 at 4:31am
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Topic: HD4 hydraulic 10-30w ?

Posted By: rentedhubbie
Subject: HD4 hydraulic 10-30w ?
Date Posted: 14 Jul 2011 at 2:48pm

I have a new to me AC HD4, It needs oils changed as they are "milk".

I have found the sticker that tells what goes where and what it is. But some of it is "RIB" = "read in book" and others confuses me,

The converter oil says use "A" type. I found hydraulic oil thats AW ISO 68 and ISO 100 in my shop. Is this the right stuff? what do I use?

next the hydraulic reservoir for the loader rams say use SAE 10-30w.

Its not hydraulic oil? Standard motor oil? Is this correct?

I have no numbers for filters or anything really.

Thanks, Anything you can do to help is really Great.

Todd, the rented hubbie

Replies:

Posted By: John(IN)
Date Posted: 14 Jul 2011 at 3:33pm

The type "A" is ATF. My books are not here but over at the location of my HD-4 or I could give you the spec for all the oils.

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Learn something every day!

Posted By: Tracy Martin TN
Date Posted: 14 Jul 2011 at 4:19pm

Type A in torque converter, hyd fluid in hyd reservoir,I like Rotella 15-40 in engine, 90 wt gear oil in finals. Rollers use 90 weight with button fitting if not changed. HTH Tracy Martin

Posted By: Coke-in-MN
Date Posted: 14 Jul 2011 at 4:31pm

they called for 10/30 as the hyd oil has to be a good anti-foam and anti-wear property also.

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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.

Posted By: mike l
Date Posted: 09 Jan 2012 at 4:44pm

which oil in the 3 speed trans?