I imagine the PTO switch has to be connected to start the engine as part of the safety interlock sysytem. I don't know what your PTO clutch resistance should read. I'd check my wiring very carefully for a short, exposed wire, etc. I had a brand new lawn tractor (AYP) that had pinched wires right from the factory and a bad PTO switch too. I don't know how you'd check the clutch itself and they're expensive to buy and replace if you don't know for sure they're bad. Does the belt sheave on the clutch turn freely by hand with the tractor shut off? It should. If it doesn't, that is an indicator of a problem.
If you unplug the clutch and pull the switch and the tractor runs, that sort of leads me to suspect a bad clutch, but it may be the circuit not being complete has an effect. You might try adding a jumper across the tractor side of that plug and see if that makes a difference. If it stays running, I'd bet the clutch is bad/seized/shorted.
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 - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
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.
