Yesterday's Tractor Co.
Shop Now View Cart
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Classified Ads
Photo Ads
Tractor Parts

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
Garden Tractors Discussion Forum

Case 446 hydraulics

Welcome Guest, Log in or Register
Mike McPhillips

06-27-2007 08:01:09

Report to Moderator

I have a case 446, (purchased new in 1983). Over the last several years, I have had hydraulic problems. I am on my 3rd pump in 4 years.

Recently, something got jammed in the rototiller. The hydraulic hose blew off the resivoir, and all the fluid came out. I replaced the flexible hose, tightened it, and replaced the hydraulic fluid with hydraulic fluid. The tractor sputtered for less than a second when I turned it on, and it hasn't moved since.

I have since heard that the Case 446 dosen't use hydraulic fluid for the hydraulic system, but instead uses motor oil. If that is true, (is it?) have I damaged the hydraulic pump by putting hydraulic fluid in it? Should I drain it and put motor oil in it? If I have to replace the hydraulic pump, do I use hydraulic fluid or motor oil?

Also I have just heard that I may have to bleed the air out of the line, and that the tractor will run if I do that. It makes sense to me. Is that true? If so, where do I bleed the line from?

Also, can someone tell me where the hydraulic pump is located on the tractor?


Mike McPhillips

[Log in to Reply]   [No Email]
ken combs

06-28-2007 04:37:23

Report to Moderator
 Re: Case 446 hydraulics in reply to Mike McPhillips, 06-27-2007 08:01:09  
I've read this several times and just noticed that you say the hydraulic line blew off the reservoir.

There should be almost no pressure on that line.

Do you have the case PTO valve on the back of the tractor? Or, do you possibly have a direct hose connection pump to tiller?

Oh, and yes do change the oil. Case recommends 30w or 20w40 but a 15w40 or 15w50 works fine.

[Log in to Reply]  [No Email]
Boyd in Mn

06-27-2007 23:31:13

Report to Moderator
 Re: Case 446 hydraulics in reply to Mike McPhillips, 06-27-2007 08:01:09  
Shell Rotella T is the preferred oil. I don't remember the weight. Go to yahoo groups and search for casegardentractors group. Lots of people on there. The subject comes up all the time and should be easy to find in the archives. These tractors definitely don't use hydraulic oil.

[Log in to Reply]  [No Email]
Eddie in MI

07-06-2007 06:46:50

Report to Moderator
 Re: Case 446 hydraulics in reply to Boyd in Mn, 06-27-2007 23:31:13  
Yes... this is true. Do not use hydraulic oil, but rather Shell Rotella T 15w40.

[Log in to Reply]  [No Email]
Mike McPhillips

06-28-2007 03:20:23

Report to Moderator
 Re: Case 446 hydraulics in reply to Boyd in Mn, 06-27-2007 23:31:13  
Thanks for the info. I will check it out.

[Log in to Reply]  [No Email]
El Toro

06-28-2007 06:20:36

Report to Moderator
 Re: Case 446 hydraulics in reply to Mike McPhillips, 06-28-2007 03:20:23  
That plow came off a Viking garden tractor made in 1936 that was built in MN. Hal

[Log in to Reply]  [No Email]
El Toro

06-28-2007 06:16:58

Report to Moderator
 Re: Case 446 hydraulics in reply to Mike McPhillips, 06-28-2007 03:20:23  

I have a 1971 Wards garden tractor with hydrostatic drive and hydraulic lift that I bought new and they recommend Dexron automatic fluid. Using engine oil in your area would get very thick during the winter. I use my tractor for pushing snow and for plowing the garden. It has hauled many loads of firewood over the years too. Hal

[Log in to Reply]  [No Email]

06-27-2007 08:31:32

Report to Moderator
 Re: Case 446 hydraulics in reply to Mike McPhillips, 06-27-2007 08:01:09  
Recommended fluid is straight 30 weight motor oil, although some do use a multi-grade motor oil in them. The hydraulic pump is behind the motor, basically right under the battery. If you follow the large hose coming out of the bottom of the hydraulic reservoir around the right side and on to the back of the engine, you will see it connects to the pump there. As far as bleeding, I've never had to do that when I changed fluid, just keep the lid off the reservoir, let the tractor idle, and cycle the speed and lift controls a couple of times. If you've ruined 3 pumps in 4 years you are either using the heck out of this thing, abusing the heck out of it, or have major contaminants in the hydraulic system. There is a coupling between the engine and pump called a lovejoy coupling, which consists of a pair of round disks with a set of drive dogs on each, with a rubber flex coupling betwen the two. If this thing is broken your pump will not turn. If you're ready to give up on this machine, I might be interested in taking it off your hands.

[Log in to Reply]  [No Email]
Mike McPhillips

06-27-2007 08:44:54

Report to Moderator
 Re: Case 446 hydraulics in reply to Ebbsspeed, 06-27-2007 08:31:32  
Thanks for your response. I like the tractor and definetly am not giving up on it.

I have a lot of equipment around the house, including a 1940 ford tractor. I don't abuse it.

The first mechanic that changed the pump thought someone had put gravel in resivoir. The pump he put in gave out when i hooked the rototiller up the following spirng. No rototilling. Just hooked it up and the pump blew. He charged me a lot to replace that pump - I thought he overcharged me. So I took it to a different mechanic, and he charged me less than 1/2 of what the first guy did.

That pump has been in about 3 years. As I explained, this time, the flexible hose blew off, and I replaced the fluid with actual hydraulic fluid. As far as I know, the pump was working when I replaced the fluid. The tractor actually engaged forward for a brief second (actually less than a second). So I wonder now if the hydraulic fluid ruined the pump, or if the hydraulic fluid, which is less viscous than the oil, is simply not viscus enough to drive the tractor. Does that make sense, or am I off base.

I will be doing the work myself, this time, which is why i have all the questions.


[Log in to Reply]  [No Email]

06-27-2007 11:12:21

Report to Moderator
 Re: Case 446 hydraulics in reply to Mike McPhillips, 06-27-2007 08:44:54  
I can't imagine that the hydraulic fluid ruined the pump in that short of a time. The shock of the tiller jamming may have forced the pressure relief valve open, and it might now be stuck open. Sounds like there was quite a spike in the pressure if it blew a hose off, so that's a possibility. If you run the engine and look into the reservoir, you should be able to see some slight movement of the fluid if it is being cirdulated by the pump. Does your hydraulic lift work? Also, check the simple stuff. The transmission high/low range lever isn't in the neutral position, is it?

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:

Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). 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. [ About Us ]

Home  |  Forums

Copyright © 1997-2016 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