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

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Discussion Forum

JD 3020LP hydraulic pressure when starting

Welcome Guest, Log in or Register

Author

Mel Lively

05-27-2003 11:11:43

Report to Moderator

I just got a 3020 home from auction and the owner informed me that I needed to "rock" the steering wheel when starting to vent pressure so the engine will crank properly (hey it works!). When running I can hear the pump "straining". What could be wrong? This model has dash mounted Hyd Levers.

Thanks in advance

[Log in to Reply] [No Email]

John de Marrais

05-27-2003 18:29:52

Report to Moderator

Re: JD 3020LP hydraulic pressure when starting in reply to Mel Lively, 05-27-2003 11:11:43

That's a common problem in all the older John Deeres with closed-center hydraulic systems and radial-piston hydraulic pumps. An internal leak in any of the hydraulic components can cause the starting problem. Biggest problem area is the steering-valve assembly or the remote hydraulic valve assembly. If everything seems to work okay, I'd leave things alone . . . but put a manual destroker in the hydraulic pump. You can buy one for $10 and it will let your tractor start right up. If you think the tractor sounds likes it's laboring, and perhaps you hear a chatter coming from the pump, then the stroke-control valve in the pump is worn out. That's another common problem and easy to fix. It is supposed to let the hydraulic pump shut itself off so the starter can turn the engine over. When it gets worn, the pump is always trying to pump oil and the starter can't do the job - especially in cold weather. If you jiggle the steering wheel, the pressure is temporarily relieved and the starter turns easier. If you install the manual desroker, it will release the hydraulic pressure no matter how worn the stroke-control valve is.

[Log in to Reply] [No Email]

Bob F

05-28-2003 04:34:57

Report to Moderator

Re: Re: JD 3020LP hydraulic pressure when starting in reply to John de Marrais, 05-27-2003 18:29:52

I've got a 2520 that acts the same way. Is the manual destroker something I can get from my Deere dealer or is it an aftermarket kit and if so where can I get it?
Thanks
Bob F.

[Log in to Reply] [No Email]

G-MAN

05-28-2003 10:50:17

Report to Moderator

Re: Re: Re: JD 3020LP hydraulic pressure when star in reply to Bob F, 05-28-2003 04:34:57

The manual de-stroking screw is available at your JD dealer. It will screw into the top of the stroke control housing on the hydraulic pump, and will be accessible behind the LH side screen. You have to turn it in when starting, and then turn it back out when the tractor is running to resume proper hydraulic operation. Some tractors were also available with an electric destroking valve, so that may be an option as well, as it could be controlled from the seat. I'm not sure if it will work on your 2520, but it might be worth checking out. Seeing as how you have to get back off to back out the screw, most guys just use the steering-wheel method anyway.

[Log in to Reply] [No Email]

John de Marrais

05-28-2003 18:01:08

Report to Moderator

Re: Re: Re: Re: JD 3020LP hydraulic pressure when in reply to G-MAN, 05-28-2003 10:50:17

The electric destroker is expensive and difficult to install. It would require removing the pump, replacing some large parts, reshimming your bearing preload, etc. Not really worth it. The manual destroker works fine and makes starting much nicer in cold weather. You must ascertain if you need the S.A.E. threaded destroker or the metric-threaded one. It depends if your tractor still has an original hydraulic pump, or has received a newer replacement that is metric. Jiggling your steering wheel is fine, but some tractors get worn to a point where it isn't enough. My neighbor hasn't been able to start his 4020 for 10 years without using the destroker.

[Log in to Reply] [No Email]

Mel

05-29-2003 07:28:47

Report to Moderator

Re: Re: Re: Re: Re: JD 3020LP hydraulic pressure w in reply to John de Marrais, 05-28-2003 18:01:08

John this may be a dumb question, but why not replace the stroke control valve? I am looking at the breakdown on the JD web site. It looks like these valves can be replaced from the bottom?

[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