(800) 853-2651
SHOP NOW

adjust JD D valves

Turn the flywheel until all tappets are loose, just before left-hand exhaust valve opens. Tighten the adjusting screws until there is no shake in the levers. Back off the adjusting screws 1/2 turn, tighten your clamps. You're good to go.
 
I always heard it was one flat to back off with, not 1/2 turn which would be 3 flats. A little math has me convinced your 1/2 turn is proper though, at 25 TPI, a half turn is .020 exactly. So 3/8 and 5/16 fine are both 24 TPI and that minor difference amounts to .0008 added to .020 for one half turn and that's very close enough. At zero lash point pushrod will quit spinning freely with fingers if that's easier to work with. And far too many don't know of the one spot in 720 degrees of crankshaft rotation to adjust all valves at once deal, thanks for keeping that method and information alive. Entire method is found in a JD service manual too, but I forget which one.
 
My info came from the SERVICE MANUAL for JOHN DEERE TRACTORS AND ENGINES. original price Fifty Cents.
eBay item number:381424882230. This covers the Model D,GP and Model E 1 1/2 horse engine. This is a reproduction on Ebay.
 
Here is a cheaper one with the green cover like my original one.
eBay item number:300561124027
 
You must log in or register to reply here.

Similar threads

D
D2pony motor fuel lines
Replies
4
Views
930
D2 1947
D
L
Hydraulic Destroke valve for a 1961 J D 4010
Replies
9
Views
328
lenray
L
grandpa Love
JD B
Replies
10
Views
611
Rich'sToys
R
Randy G.
2940 rock shaft raise- lower operation
Replies
5
Views
163
Tx Jim
Tx Jim
N
644a oil pan, 6-404 pan compatibility
Replies
6
Views
807
fdt860
F
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