(800) 853-2651
SHOP NOW

Allis Chalmers C oil pump

L

Larry Hardesty

Member
Making some progress on my 1942 Allis Chalmers C. Got the starter back from the repair shop, and with some working on the timing, go it started tonight. That is the good news.

The bad news is no oil pressure. Fortunately only ran it a few seconds. Dropped the pan and pick up tube was in oil. Took off the oil filter and no oil getting to it. Put some oil in a quart container and put the pick up tube in it and turned over the engine. No oil sucked up. No cracks in the pick up tube.

What is the next step?? Ran out time but it looks like splitting the tractor and looking at the oil pump. Read some the threads about the check ball. I know I checked the vanes and spring and they seemed okay, as did the check ball, but I do not know. Looking for any advice. Thanks in advance.
 
Take the line off that comes up from the pump to the filter & fill it with heavy oil to prime the pump gears. Hit the starter & if it spits oil it should be good.
 
So that is the trick. It needs to be primed. I will give it try tomorrow. Thanks much. It would be great if it were an easy solution and I do not have to split the tractor...again!
 
Do you have the correct oil filter on it?? If you do not you will not have oil pressure since it uses a back pressure oil filter to gain oil pressure. I have never had to prime one when I have rebuild those engines
 
In thinking about it, I do not think it is the oil filter since oil is not even getting to the oil filter. Thanks for your thoughts and welcome any more.
 
Since retorquing is needed after the engine has been brought up to normal running temperature I never put the valve cover on until after this is done. I put a hose over the stand pipe that is long enough to lay over the rocker arms. To prime the pump I fill this hose and let it seep down and refill before starting the engine. When oil starts to run out the hose over the rocker arms I shot down the engine, remove the hose, install the oil filter and set the valve cover on. I then start the engine and check to make sure it has oil pressure and let the engine get up to running temperature. I let the engine cool down some and retorque the head and reset the valve clearance.
 
I put in just engine oil and hit the starter (not long though) and it appeared oil was coming back. I put in gear oil and hit the starter briefly and oil came back. Now I did not hit the starter long and I don't know how much oil should come back, but some certainly did.

I checked the lines and blew them out (including the filter) and they seem clear, although some stuff did come out. My mechanic comes out Monday night and we will try again. Trying to prime the oil pump is certainly better than splitting the tractor again. I will keep the list posted.

Thanks
 
You might try pulling the filter off and then pouring some oil into the filter area so as to fill any of the line that sit lower which would help prime the system. As for that number not sure what that would cross to. I use the Wix filters but with out going out and looking not sure of the number on it other then 57???
 
You could take the filter off, have a person hold their finger on the hole in theend of the filter tube while you turn it over with the starter (with the plugs removed) watching for the gauge needle to move. With the hole on the filter tube closed you will get all the oil pressure the pump puts out, the hole is essentially a "leak" in the oil system.
 
You must log in or register to reply here.

Similar threads

T
C oil pump losing prime
Replies
1
Views
877
KL in Wi
K
T
ALLIS CHALMERS 7040
Replies
5
Views
729
DrAllis
D
Hdonly
TO-30 rubber seal for oil pump pick up tube
Replies
6
Views
259
Northvale PA
N
A
Allis Chalmers D14
Replies
2
Views
469
AllisD14
A
4
Allis Chalmers B oil priming after filter change
2
Replies
23
Views
885
49clipper
4
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