In my opinion two things need to be addressed. The first is the actual lockup, and the second is the brake action. I have not ben into the brakes on these, so this is an external construct of the way it works. The hydraulic system has a pressurizing control system (MCV)supplying working pressure to the brake system. This pressure is dead headed at the control valving Prt#28. When the brakes are applied, this pressure is directed to the brake cylinder/piston, Prt#1, and 11. Sa pressure builds, the piston compresses the materials of the disks and stops the shaft. When the pedal is released, the piston returns as the fluid is blead off to the return pipe Prt#14. and the pressure remains at near zero in the cylinder.
This seems to be the case in your tractor because the pressure is at or near zero when the engine is running, and a bleeder is open.
If the brakes were getting pressure, the bleeder would be under direct pressure, and making a mess.
Questions: Does the bleeded make a mess when the engine is running and the brake is applied with the bleeder open?
Does the loosening of a brake apply tube (parts 32 or 34) (with a pan under it before starting) cause a mess?
If no real pressure/mess is hapening in the above, I believe your issue is in some other system!
If the wheels (and therefore the pinion shaft) are free when the tractor is shut off, then the brake components inside the drum/housing cannot be binding in the housing in the relaxed state. Thus I believe they would not bind with the near zero pressure supplied from the valve.
Is there a TA in the tractor. If yes, there could be the application of both front and rear clutches at the same time, thus preventing motion. These TA clutches are hydraulic. one locke it in direct, the other locks it in TAreduction to avoid coasting. If the levers are removed, the system might still be inside, as it hads been dramatically reconstructed. If it does not move with the brake lines removed or loose, This is my best guess! Jim
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. [ About Us ]
Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
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.