CA Hydraulic/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=208707
Printed Date: 30 Oct 2025 at 7:14am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: CA Hydraulic/Transmission Oil
Posted By: dfwallis
Subject: CA Hydraulic/Transmission Oil
Date Posted: 29 Oct 2025 at 12:26pm
|
CA recommended SAE 10W <40f, 20W >40f I bought hydraulic fluid at NAPA, showed them a picture of the 10W20 product I wanted, paid, but they brought out a 30W product and put it in the car. I didn't pay attention that they didn't give me what I asked for. Anyway, the pump works well but sometimes it takes a while longer than desired to prime. Nobody uses SAE oil ratings for hydraulic fluid any more, and it's not clear what the best ISO grade to use is: SAE 10 weight viscosity: 45mm**2/s at 40C, 7.0mm**2/s at 100C SAE 20 weight: 61mm**2/s at 40C, 8.5mm**2/s at 100C ISO 32 weight: 32mm**2/s at 40C, 5.5mm**2/s at 100C ISO 46 weight: 46mm**2/s at 40C, 7.0mm**2/s at 100C ISO 68 weight: 68mm**2/s at 40C, 9.5mm**2/s at 100C None of the ISO ratings match the original specs. I don't suppose those were too precise. I'm inclined to go with ISO46AW. But that seems to equate more closely to a SAE 10 weight. Hopefully, the "AW" additives will help make up for any differences. yes/no? Why are they rating these at 40C??? that's 104F (and 212F). ------------- 1952 CA13092 |
Replies:
Posted By: Les Kerf
Date Posted: 29 Oct 2025 at 1:26pm
|
Considering the 'relatively' light work your CA will likely see in Texas, I would use the ISO 32. If you intend to cultivate cotton in 95 degree heat for 12 hours at a time then use the ISO 46. The ISO 32 works perfectly in my somewhat cooler climate here in northern Idaho, ISO 46 is somewhat sluggish.
|
Posted By: Dennis J OPKs
Date Posted: 29 Oct 2025 at 1:46pm
| I have used straight 30w non-detergent in KS, not zero temps and it works fine. |
Posted By: DrAllis
Date Posted: 29 Oct 2025 at 5:34pm
| Why wouldn't one use 821XL/PermaTran/HyTran/HyGard ??? All readily available and correct everything mixed in. |
Posted By: dfwallis
Date Posted: 29 Oct 2025 at 5:41pm
At some point, AC added a check valve in the inlet, presumably to improve priming. 1952 doesn't seem to have a check valve/ball. It's a minor problem, but sometimes it can take 10-15 seconds (or longer if its cold) before it starts to pump, usually on a fresh startup. May be a combination of wear and oil viscosity. With thicker oil, it was nearly impossible to get it to prime. ------------- 1952 CA13092 |
Dennis J OPKs wrote:Posted By: dfwallis
Date Posted: 29 Oct 2025 at 5:44pm
That's roughly what it has in it (821Xl compliant). That's roughly 10W30 and it has trouble priming sometimes. ------------- 1952 CA13092 |
Posted By: dfwallis
Date Posted: 29 Oct 2025 at 6:05pm
The tractor is in Indiana. It will have a relatively easy life for the foreseeable future. It may on occasion do some plowing/discing. My brother is eyeing it for his garden. It may be used for some brush hogging if I get the smaller one working, but mostly finish mowing. ------------- 1952 CA13092 |