(800) 853-2651
SHOP NOW

Farmall 300 oil pressure

Our Phone System is Down!

Please use the Contact us Form

We are working to resolve the issue ASAP! Thanks for your patience!

A

Anonymous-0

Well-known Member
When I start my Farmall 300 the oil pressure is 60. After she heats up (30 min)she goes no lower than 20. Is this ok? Could it be the bearings or the pump? Thanks
 
That is plenty of pressure. I have one M that drops down to 5psi when it is warm at idle, around 20psi mid throttle.
 
That is a lot of drop, but it all depends on if this is something that just recently happened or if it has been doing it for a long time. It is definetely not a normal situation for a lube system in good over all condition. Could be leaking pressure relief valve, general worn out oil pump, excessive clearance on end plate of oil pump(blown gasket) general loose mains , rod, cam bearings or it could indicate one failing or failed bearing, so , like I said , depends , has this just suddenly happened.
 
It sounds a little low and check gauge to see if its good before tearing into anything. I have a M and 450 and they both run 70 to 75 lbs. pressure cold or hot.
 
bearings getting worn
10w-30 is a little thin for worn bearings.
15W-40 diesel rated oil will pick it up some if worn.
Put rod and main bearings on your future to do list.
not hard, and you can put a new oil pump cover gasket and
relief spring(if applicable on that motor), and plane the cover
when you are in there.

with that said, I've had tractors that dropped worse. no problems, I
just knew that I would have to roll in new shells when I had the time.
 
You are fine.

20 PSI at operating temp on a 1950s tractor engine is actually pretty good. 30 PSI was common when new - at opearing temp, after 50 years of use I wouldn't be surprised if you don't have 10 psi lost in just the gauge not measuring it accurately.
 
You must log in or register to reply here.

Similar threads

C
1655 310 oil pressure
Replies
2
Views
272
Cash4Toys
C
D
International 784 engine oil pressure
Replies
7
Views
286
BarnyardEngineering
BarnyardEngineering
3
300 Farmall Hydraulic help
Replies
10
Views
597
dewy
D
L
Super A Oil Pressure
2 3
Replies
48
Views
2K
kshansen
K
J
Ih 606 not starting
Replies
8
Views
340
Janicholson
Janicholson
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