Yesterday's Tractor Co. The Right Parts, Right Away
Click Here or call 800-853-2651 
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Tractor Manuals
Tractor Parts
Classified Ads
Photo Ads

Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs

Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life
Enter your email address to receive our newsletter!

Farmall & IHC Tractors Discussion Forum
Show Parts for Model:

Farmall M Hydraulic system problem

Author  [Modern View]
One Shot

11-16-2012 07:56:17

Report to Moderator

I have a 1947 Farmall M equipped with a hydraulically operated front bucket loader. When I raise the bucket up, it will slowly decend on its own and will not hold in place. Hydraulic fluid also comes out of a hole in the center of the plug on top of the hydraulic fluid reservoir when operating the hydraulic system. Is there suppose to be a hole in the plug? If not, is this why the hydraulic system will not hold the bucket up in place? If so, why won't the hydraulics hold the bucket in place?

[Reply]   [No Email]
gene bender

11-16-2012 10:55:17

Report to Moderator
 Re: Farmall M Hydraulic system problem in reply to One Shot, 11-16-2012 07:56:17  
Your problem is how it is plumbed when you move the bucket its taking hy fluid away from the cycls that are holding it up thus letting them down because the fluid holding the loader up goes to the valve running the bucket i had to redo one once that did the same as yours.

[Reply]  [No Email]

11-16-2012 10:22:24

Report to Moderator
 Re: Farmall M Hydraulic system problem in reply to One Shot, 11-16-2012 07:56:17  
The belly pump reservoir is supposed to be vented when used with one-way cylinders. The hole in the cap is normal.

When one way cylinders extend, they suck oil from the reservoir, and air has to get in. As they retract, the oil gets pushed back into the reservoir and the air has to get back out.

If oil's squirting out, it's because you have too much oil in the reservoir. Only fill the reservoir with the loader completely lowered, to avoid overfilling.

Your hydraulic control has three positions, raise, hold, and lower. Being a 60-70 year old tractor, the hydraulic control valve is probably VERY worn, and you may not be getting it 100% in the hold position. It may also be leaking internally. This may be why the loader leaks down over time.

[Reply]  [No Email]
IH fan

11-16-2012 09:33:44

Report to Moderator
 Re: Farmall M Hydraulic system problem in reply to tractor vin, 11-16-2012 07:56:17  
If the cylinders are single action, the leak should be extrenal if they are leaking. Some single actions have a drain hose off the rod end and if that's the case and the cylinder is leaking, oil should comeout that drain hose. If they are double action, capping both sides and doing like jan... says, they are leaking past the piston. As for the hole in the cap, that's a breather for the reservoir. Hole will be cross drilled through the wrench flats and the inside will be drilled to intersect that cross drill. There should be a porous bronze insert inside the cap to keep dirt out.
This post was edited by IH fan at 09:36:13 11/16/12 2 times.

[Reply]  [No Email]

11-16-2012 08:59:12

Report to Moderator
 Re: Farmall M Hydraulic system problem in reply to One Shot, 11-16-2012 07:56:17  
The probable reason the loader drops is beacause the cylinders that do the lifting have bad seals on their pistons. They are rebuildable. To check the seals put a jack under the bucket so that the jack is extended at least 8 inches.
Lower the bucket to remove all pressure from hoses. Remove the pressure hose from the Liftall and (avoiding loss of fluid) cap it. If the hoses run from both sides, cap both hoses.
Now lower the jack. If the loader drops as before, it is the seals in the cylinder. Local hydraulic shops fix them routinely. If it stays up, the Liftall controll is leaking. (much less likely) The return hoses are probably routed to a T at the fill pipe. If routed to the drain with a close nopple and T they will not squrit. Jim

[Reply]  [No Email]
One Shot

11-17-2012 11:59:45

Report to Moderator
 Re: Farmall M Hydraulic system problem in reply to Janicholson, 11-16-2012 08:59:12  
Dear Janicholson,
I neglected to state that the hydraulic bucket has 2 cylinders that lift the bucket and 1 cylinder that tilts the bucket. In addition to the bucket lowering on its own, the bucket also tilts slowly on its own. That being said, wouldn't the fact that if all cylinders are not holding indicate that the chances of all cylinders leaking by would be highly unlikely?

[Reply]  [No Email]
One Shot

11-17-2012 11:52:25

Report to Moderator
 Re: Farmall M Hydraulic system problem in reply to Janicholson, 11-16-2012 08:59:12  
Dear Janicholson,
When you say "Cap it", am I correct in assuming that you mean to cap it so the cylinders are air tight?

[Reply]  [No Email]

11-17-2012 18:29:30

Report to Moderator
 Re: Farmall M Hydraulic system problem in reply to One Shot, 11-17-2012 11:52:25  
Yes. The valving you are using may be the real issue. If you test the cylinders successfully the valves may be the source. Farmall belly pumps rarely leak down, valve systems used with them can and do. Jim,

[Reply]  [No Email]
[Options]  [Printer Friendly]  [Return to Forum]   [Add a Reply]

Hop to:
Same-Day Shipping! Most of our stocked parts ship the same day you order (M-F).  Expedited shipping available, just call!  Most prices for parts and manuals are below our competitors.  Compare our super low shipping rates!  We have the parts you need to repair your tractor.  We are a Company you can trust and have generous return policies!   Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ More Info ]

Home  |  Forums

Copyright © 1997-2014 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