Welcome! Please use the navigational links on your left to explore our website.

Company Logo 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
Kountry Life
Allis Chalmers Discussion Forum

AC 170 Diesel Starter Will Not Stop Turning The Engine

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

03-19-2020 11:12:48

Report to Moderator

Just bought this tractor and had this problem from the get-go. If I try to start the tractor with-out plugging the heater in. The starter will keep turning the engine over. I have to take a battery cable off to stop the starter. The starter will not turn over if I don't the clutch pedal down but when I release the starter button on the dash and let the clutch out on the dash, the starter continues to keep turning over.

I replaced the starter solenoid and the starter button on the dash and it does the same thing.

When I plug the block heater in the tractor, the starter works just fine. Any suggestions to what the problem is. This on a AC 170 Diesel.

[Log in to Reply]   [No Email]

03-19-2020 17:39:26

Report to Moderator
 Re: AC 170 Diesel Starter Will Not Stop Turning The Engine in reply to KCTractors, 03-19-2020 11:12:48  
I had an MF 265 diesel do that once, found the heavy drive nose spacer washer was broken that limits the drive travel on the Delco starter. When that happens the drive travels too far, and solenoid can't shut off correctly. A new spacer washer fixed it, it's a challenge to change as it fits over the snap ring. Worth a look.

[Log in to Reply]  [No Email]

03-19-2020 15:38:08

Report to Moderator
 Re: AC 170 Diesel Starter Will Not Stop Turning The Engine in reply to KCTractors, 03-19-2020 11:12:48  
agree with gummy drive. time to remove starter and clean and check bushings, oil the drive. the flywheel is kicking the drive out when it starts.

[Log in to Reply]  [No Email]

03-19-2020 12:28:02

Report to Moderator
 Re: AC 170 Diesel Starter Will Not Stop Turning The Engine in reply to KCTractors, 03-19-2020 11:12:48  
Starter drive and the splines it slides on may be oily/sticky/gummy?

Also, a combination of weak batteries and a hard to crank engine may make it more likely for a solenoid to stick.

[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). We have the parts you need to repair your tractor - the right parts. Our fast shipping, low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums

Copyright © 1997-2019 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