TRACTOR PARTS Allis Chalmers Case & David Brown Farmall & International Ferguson Ford & New Holland John Deere Massey Ferguson Massey Harris Minneapolis Moline Oliver & Cockshutt Kubota / Yanmar

TRACTOR MANUALS

Allis Chalmers	Case	Farmall IH	Ford 8N,9N,2N	Ford
Ferguson	John Deere	Massey Ferguson	Minn. Moline	Oliver

Tractor Talk Discussion Forum

B 50 Yanmar..HELP!

Welcome Guest, Log in or Register

Author

Truck

02-04-2004 20:16:00

Report to Moderator

Buddy of mine got a B-50 Yanmar escavator..Runs excellent , grader blade goes up and down ok,tower spins, tracks almost move, boom doesnt work at all. It was at an auction in a sale when it stopped working all of a sudden.. Fluids and filters all have been changed, on the theory someone may have contaminated it at the auction site..It still doesn't work right.. Does anyone have any ideas? Until it got to the auction it worked 100 percent, now no tracks and no boom /bucket, etc.make it sorta useless... Local Yanmar dealer is not being at all helpful, can't even buy a book for it from him.

Thanks for any help.. If I can get him the info he needs to fix it I get to use it once in a while!!

[Log in to Reply] [No Email]

John R

02-05-2004 16:40:05

Report to Moderator

Re: B 50 Yanmar..HELP! in reply to Truck, 02-04-2004 20:16:00

Sounds like you shucked a pump. I have two of these machines a B-50 and A b-50-1. These have a tandem piston pump with a gear pump on the back of the tandem. The gear pump supplies the blade and the swing. This pump must still be good. The tamden piston pumps supply everything else. Just went through this last summer. You need to replace the piston pumps. Very expensive $4000.00 plus for the pumps. No one in the U.S. has a replacement or a rebuild for this pump. Get ahold of Dominion Equipment @ 1-800-365-7260 or 804-752-7539 and talk to Buck. He can help you out and can tell you for sure if this is the problem. Great little machines if you don't run them out of oil. That is what happened with mine, an employee ran it after an oil line to the tracks broke. He tried to get it loaded on the trailer and even added more hyd. fluid, but by then it was too late. Probably why it was at auction, just a guess tho. Good luck. Email me if you have any questions.

[Log in to Reply] [No Email]

Les...fortunate

02-05-2004 02:37:31

Report to Moderator

Re: B 50 Yanmar..HELP! in reply to Truck, 02-04-2004 20:16:00

Truck, I don't have any help for you but it's good to see you post. Still got that saw rig?

[Log in to Reply] [No Email]

truck

02-05-2004 15:18:40

Report to Moderator

Re: Re: B 50 Yanmar..HELP! in reply to Les...fortunate, 02-05-2004 02:37:31

I don't know, Les... I'm home so seldom anymore I don't remember which lump in the snow might be it...lol..

Sure is fun being an escort, tho.

(NOT THAT KIND of escort,I drive a pilot car!!lol) Truck
Hmm. Releif valve... Maybe if some yahoo was goofing around with it at the yard he mighta popped it and it stuck. Sounds like a very similar setup, Fawteen. Where are your releif valves on your machine?

Thanks again!

[Log in to Reply] [No Email]

Fawteen

02-05-2004 02:16:56

Report to Moderator

Re: B 50 Yanmar..HELP! in reply to Truck, 02-04-2004 20:16:00

I don't have any experience with Yanmar excavators, but do maintain a Takeuchi TD25 which uses a Yanmar engine. I'd expect the overall layout is similar enough to make some assumptions.

Ours uses 2 hydraulic pumps hooked directly to the crankshaft of the engine. The output of the pumps goes to the plumbing under the cab, with various valves to direct the pressure to the various functions. I don't know off the top of my head how the flow from the two pumps is divvied up, but it shouldn't be hard to figure by tracing the plumbing.

My first suspicion would be that one of the pumps has failed, and you've lost power to the tracks.

My second guess would be that a pressure relief valve has stuck open.

Figure out exactly which functions don't work, trace the plumbing back (for instance from the boom cylinder to the associated valve) and figure out which pump or pressure relief serves that function, and go from there.

[Log in to Reply] [No Email]

[Options] [Printer Friendly] [Posting Help] [Return to Forum] [Log in to Reply]

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. [ About Us ]

Home | Forums

Copyright © 1997-2023 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