(800) 853-2651
SHOP NOW

JD 3020 Rockshaft Jumping

L

lzamzow

New User
I have a recently acquired JD 3020 I got running, etc. I hooked up an 8' three point shredder and with the rockshaft control lever in the full up position, the shredder jumps up and down. If you pull the lever down 1/8" to 1/4" it stabilizes. I compared the cable in the rear to my 3010 and everything is spaced out the same.
 
Yes sir. 11 gallons of JD Hydraulic oil, new filter and cleaned a metal screen that is about a foot long from a side drain plug behind the filter housing. I'm reading the service manual now, but I'm in over my head.
 
The most COMMON (but dertainly not the only) cause of 3-point "jumping" is a leak at the piston seals.

Could be as simple as needing to replace the seals, or a rusted/scored/scratched/BAD cylinder bore.
 

Since 3 pt stabilizes when control lever is lowered a little I'm going to state L/D mechanism needs adjusting as outlined in JD tech manual. Have you changed location of L/D lever under seat?
 
Yes I did. It does do different things at different settings. On one setting, it hops no matter where the lever is. On the L/D setting is where it will stop if you pull down on the lever some. Actually, that is lowering the shredder about 1/2 way.
 
Thanks for response. If you turn the tractor off with the shredder up it doesn't take very long (say 3 or 4 minutes) for the shredder to go all the way down. So, that's an apparent characteristic of the seals being worn out. I did change the hydraulic oil and filter and cleaning a screen there underneath by the filter housing, before I started all of this, and the oil wasn't really all that bad, so I am surprised that the rockshaft cylinder seals would be that bad.
 
Ok, on second thought I changed the hydraulic filter, but you say transmission filter. Is there a transmission filter? This is a syncro range not a powershift if that make a difference. Like I said I cleaned a tubular screen that's about a foot long from a horizontal drain plug there behind the hydraulic filter housing.
 
You must log in or register to reply here.

Similar threads

B
Mounting Year A Round Model 120 on JD 3020
Replies
0
Views
258
BSeiche
B
rusty6
Snow Blower Finally Installed
Replies
7
Views
1K
rusty6
rusty6
S
JD 2040 (year 1980) rock arm (bushhog) stuck in up posit
Replies
1
Views
154
Tx Jim
Tx Jim
R
1968 3020 JD Tractor Hydraulic Coupler Leak
Replies
8
Views
511
rbeissel
R
J
John Deere 3010 power steering
Replies
2
Views
375
Jamnjar
J
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