(800) 853-2651
SHOP NOW

4020 rockshaft housing correct assembly

P

Pecanmanbc

New User
Last summer I repaired an external leak on rockshaft housing and o rings on valves. Assembled it and 3 pt arms went up....no leaks....continued mowing.
Now when I hook up a 3 pt tool....arms go up, they go all way down, not much in middle. Did I miss the correct placement of cam follower in housing? And what setting should draft lever been in ....late model 4020. How do I get the correct placement of cam?
 

For any task except utilizing ground engaging equipment(plow) L/D lever should be set in ''D". I suggest to adjust L/D control mechanism following steps outlined in JD 4020 tech manual. You might be able to determine if cam follower on 3 pt linkage is in correct position by viewing through round opening in rear of trans case up & to the RH side of rear pto shaft.
 
I'm sure the cam is miss aligned. The
arms worked as they should before I took
the housing off and reassembled it. How do
you get the cam in correct position during
reassemble of heavy housing?
 

Remove rockshaft control valve housing(shaded outline) then align cam(item 10) in linkage correctly as housing is reinstalled with new gasket & seals(see photo below for part #s)
mvphoto85109.png
 
I've got a industrial 400 that had the cam follower misaligned. When putting it back together I slowly lowered the housing with a cherry picker while my wife got everything aligned with a screwdriver. It looked like when ever it was assembled misaligned some flexing occurred.
 
I lower it then align the arm with the cam and then continue to lower the housing until seated . If you get the arm on the wrong side of the cam the three point wont work at all period
 
You must log in or register to reply here.

Similar threads

C
800 hydraulic pump confusion....problem?
Replies
4
Views
411
Centerline
C
K
How to time 4020 rockshaft gears?
Replies
4
Views
669
knwc
K
D
4020 PTO spinning again
Replies
3
Views
695
Dweitzel
D
A
Jubilee remote hydraulic valve problem
Replies
1
Views
432
riveroadrat
R
F
60 Rockshaft Piston Housing Blown-Again
Replies
19
Views
3K
Gene Davis (Ga.)
G
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