Bob - you got it right. The D17 was 7.25:1 compression for the entire run from 1957 to 1967 for gas engines. The Gleaner E combine came out with the same 7.25:1 engine in 1962 somewhere in the middle of production it switched over to 8:1. 1968 EIII Gleaner was also 8:1. 170 was 8:1 and 175 8.25:1. The 175 also got a 1/8" bigger carb too. The G226 engines have codes in the serial number on the block behind the carb to tell you how it came from the factory. M=7.25:1, Z=8:1, V=8.25:1.
Right again that the D17 was 1650 rpm's and the 170 & 175 were 1800 rpms. The earlier WD45 with the 226 engine was 1400 rpms. When Allis first designed the larger 180 tractor it planned to use the 226 gas engine running at 2000 rpms. And yes they were concerned with vibration since it was not counterbalanced as you point out. The prototype met the specs and Allis built 100 of them with the 226 engine. The production versions had vibration problems when they tested them. They went back and retested the prototype and it it was fine...apparently a one of a kind anomaly. So Allis had to back to the drawing board for a few more months and decided to use the 265 6-cylinder gas from the 190 with a smaller carb for the 180 gas (I have one love it!).
Another note on the D17 226 engines...early ones up to SN24000 had a bypass oil filter system ...24001 & up used a full flow oil filter system. Another change I believe in the heads was going to 3/8 reach spark plugs plugs in early D17's to 3/4 reach plugs. But I can't find where that SN break is even in the parts book. Mike
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 ]
Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
... [Read Article]
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.
