(800) 853-2651
SHOP NOW

641

J

jr1983

Member
I haven't got my service manual yet so I'll just ask you guys. What oil do I use in the rear diff trans and hyd on a 641 ford? I am aware theyre separate.
 
134 D or the current equivalent(I forget the current nomenclature of this oil) that meets the Ford spec. It can be used in all 3 compartments. Heavier oil can be used in the differential and transmission compartments, but the concern is if seals leak between them the heavier oil ie; 90 wt can migrate to the hydraulic compartment and contaminate it, causing problems with the tractor hydraulics. There was a technical bulletin by Ford a long time ago about this, recommending the use of their 134... oil in all 3 components.
 
Originally, they called for gear oil in the transmission
and rear end, and hydraulic oil (134D, in today's
standards) in the hydraulic sump. However. ... after
all these years, the seals between the
compartments often leak, so the current
recommendation is to use 134d-compatible oil in all
three sumps. The hydraulic system does not like
gear oil.
 
The original hydraulic oils that were available when the tractor was new did not have the additives that modern UTF fluids have, and some hydraulic fluids on the market that are sold as just hydraulic fluid do not have the additives either, which are needed for the Extreme Pressure (EP) conditions between the mating surfaces of the gear teeth both in the transmission and the differential, so do not use any old hydraulic fluid. Make sure that it says on the label that it meets or exceed the Ford/New Holland M2C134D specification.
 
You must log in or register to reply here.

Similar threads

D
Ford 850 common issues
Replies
4
Views
245
Dave Ford850
D
M
2910
Replies
2
Views
322
marloweg
M
J
Ford 256 irrigation engine
Replies
19
Views
396
Destroked 450
Destroked 450
V
correct oil
Replies
7
Views
444
Texasmark
T
J
Rear main seal
Replies
0
Views
132
jerryf609
J
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top