(800) 853-2651
SHOP NOW

oil pressure drops in IH 340 utility after warm-up

M

Moondoggie

Member
The oil guage shows pressure of about 45-50 psi on start up, but the reading drops to just under 20 after warm-up. Is this the wrong oil viscosity, a bad guage, a plugged line or a bad oil pump? The engine does not run hot. The least expensive resolution would of course be appreciated.
 
Oil pump or cam bearings, etc. However, if not run under heavy load it can last a long time with that oil pressure. It is not the viscosity, and a bad gauge will not read that high when cold. And, the oil pressure is always higher in a cold engine.
 
As CNKS says, most likely the oil pump. Specifically the pot metal oil pump cover is warped. Common problem on this series of engines. Low cost fix if that is the problem. Drop the pan, remove the oil pump cover, check with a straight edge to see if it is warped. Get something very flat (piece of plate glass) 220 or so grit sand paper and sand the cover flat. Very thin paper gasket between oil pump body and cover may be blown. Only place I know of to get it is CIH. HTH.
 
You must log in or register to reply here.

Similar threads

J
WD45 Diesel Oil Pressure
Replies
10
Views
625
DrAllis
D
T
MM BG oil pressure. (follow up)
Replies
2
Views
686
MMDEL
M
M
IH 340 Utility Grinding Gears
Replies
10
Views
545
BarnyardEngineering
BarnyardEngineering
J
Low oil pressure on a JD950
Replies
2
Views
2K
bmaverick
bmaverick
A
John Deere 420 oil pressure
Replies
4
Views
410
Albertpinette
A
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