(800) 853-2651
SHOP NOW

NEED HYDRAULIC HELP!

C

charlieray

New User
I own a Case 446 tractor with hydraulic drive. My tractor has begun to not pull under any load. I can get on it and drive it anywhere as long as I am not pulling up a hill. My question is: how can I determine if it is a drive motor or control valve at fault? I have no way of checking with a pressure gauge. The three point lift seems to work okay. I'm recalling thing control valve. Am I right?
 
Is this a hydrostat unit, or a separate hydraulic pump/motor?

If it's a hydrostat, the unit will need to come apart and be inspected. Probably be obvious once in there.

If it is a separate hydraulic pump, look for a pressure relief valve that may be bypassing, clogged suction screen, low oil level.

A shop manual would be a valuable investment.
 
(quoted from post at 16:28:36 05/31/17) Is this a hydrostat unit, or a separate hydraulic pump/motor?

If it's a hydrostat, the unit will need to come apart and be inspected. Probably be obvious once in there.

If it is a separate hydraulic pump, look for a pressure relief valve that may be bypassing, clogged suction screen, low oil level.

A shop manual would be a valuable investment.
Click to expand...

Thank you for your quick response. Where would a manual be available?
 
Ebay.

They have several to choose from, looks like it is broken down to each component, engine, hydraulics, ect.

This one is more expensive, but should cover everything (if it's all there). I see it doesn't specifically cover 446 though, but probably a different year, likely minimal difference.

If you plan on keeping this tractor, the complete one would be best, or if you just want to see the drive train, others will cover it, just not sure which ones you would need.
Manual
 
It is not a hydrostatic trans. It is a simple open center hydraulic drive system. Constant displacement Pump, Variable flow control valve, and fixed displacement hyd. motor.
It amasses me that people reply to technical problems and are totally clueless about how the machine is designed and constructed.
Loren
 
Low on oil
Wrong oil
Rock in hydraulic tank (do you have kids :D )
Rear end in high range instead of low
Pump coupler on back of engine
 
You must log in or register to reply here.

Similar threads

Btzj02
8N51 New Hydraulic pump.
Replies
0
Views
85
Btzj02
Btzj02
J
Help me understand remote hydraulics
Replies
19
Views
438
TheOldHokie
TheOldHokie
D
Ford 3000 Hydraulic pressure problem
Replies
6
Views
327
TheOldHokie
TheOldHokie
N
1975 ford 4000SU hydraulic help needed
Replies
2
Views
278
newfarmer 4000SU
N
M
  • Question
Oliver 550 Hydraulic issue
Replies
6
Views
278
msellers
M
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