Yesterday's Tractor Co. Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Classified Ads
Photo Ads
Tractor Parts

Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs

Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life
John Deere Tractors Discussion Forum
Show Parts for Model:

2840 Rockshaft linkage fulcrum

Welcome Guest, Log in or Register
Author  [Modern View]
Bob Angus

08-11-2014 15:53:10

Report to Moderator

Hi, I have a 2840. Just resealed rockshaft cylinder. Seems to work well but I am having trouble getting any adjustment from the screw under the plug by the control shaft input. 1/4 turn clockwise is supposed to get me 4mm. I can't see a difference and I have gone a couple turns. I don't want to back the screw out in there. The only things I can think of are that the adjustment plate is worn or that I have the eccentric fulcrum(held by spring pin) in backwards. It only goes two ways. With the control arm parallel to the rockshaft housing line, the thick part is pointing down. That's the way I have it, and the way was it was but someone may have had it out before. Does anyone know how this goes? Thanks

[Log in to Reply]   [No Email]
Tx Jim

08-11-2014 16:12:30

Report to Moderator
 Re: 2840 Rockshaft linkage fulcrum in reply to Bob Angus, 08-11-2014 15:53:10  
Does this parts photo help?

[Log in to Reply]  [No Email]
Bob Angus

08-11-2014 16:37:04

Report to Moderator
 Re: 2840 Rockshaft linkage fulcrum in reply to Tx Jim, 08-11-2014 16:12:30  
The part I am speaking of is AT19840. It is part of the rockshaft cylinder linkage. I think it only goes in one way but I've been wrong before. I just cant seem to be able to adjust(specifically increase) the control lever neutral range. I have the manual but both it and the parts diagrams arent really clear. I certainly don't want to back the "special adjustment screw" T22228 out in there. To my knowledge it is together load control arm in slot and on cam.

[Log in to Reply]  [No Email]
Tx Jim

08-12-2014 03:30:25

Report to Moderator
 Re: 2840 Rockshaft linkage fulcrum in reply to Bob Angus, 08-11-2014 16:37:04  
I think the cam(parts key 7) must stuck on the lever(parts key 6) as when adjusting valve clearance one doesn't need to turn screw(parts key 8) much to get a lot of clearance. From your description I think you have the fulcrum installed correctly. Is spring(parts key 9) attached correctly??

[Log in to Reply]  [No Email]
Bob Angus

08-12-2014 18:06:39

Report to Moderator
 Re: 2840 Rockshaft linkage fulcrum in reply to Tx Jim, 08-12-2014 03:30:25  
Tx Jim. Maybe the cam is stuck. I get very little increase in neutral range by going 2 turns. However, fully tight(full counterclockwise) the valves are spraying. They stopped after turning out clockwise, so it must be doing something. I cant seem to get the 2-4mm free play spec on the lever. I got maybe 1mm., and I don't want to go more than 2 turns because I am paranoid about the screw backing out, and seems like that's about all the adjustment its got. Does this sound normal? If stuck so any ideas on how to free this up through the plug adjustment hole.Should I be worried about this or is this close enough?

[Log in to Reply]  [No Email]
Tx Jim

08-13-2014 03:11:37

Report to Moderator
 Re: 2840 Rockshaft linkage fulcrum in reply to Bob Angus, 08-12-2014 18:06:39  
I think if spraying of the oil stops then you should be fine. Only good way to check linkage is to remove RS housing from tractor.

[Log in to Reply]  [No Email]
Bob Angus

08-12-2014 06:53:39

Report to Moderator
 Re: 2840 Rockshaft linkage fulcrum in reply to Tx Jim, 08-12-2014 03:30:25  
That's a good thought. Like I said, I am pretty sure I have the fulcrum right as it doesn't fit the other way. Spring is definitely attached. I'll get a screwdriver in there today to try to see if it is free. Thanks Tx Jim.

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:

Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]

Home  |  Forums

Copyright © 1997-2018 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