Welcome! Please use the navigational links to explore our website.
Company Logo (800) 853-2651 Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Discussion Forum
:

What is a pony motor?

Welcome Guest, Log in or Register
Author 
V.

03-10-2002 18:29:04




Report to Moderator

Can anyone tell me what a pony motor is when it comes to John Deere?




[Log in to Reply]   [No Email]
G Taylor

03-11-2002 09:13:12




Report to Moderator
 Re: What is a pony motor? in reply to V., 03-10-2002 18:29:04  
In some areas the pony engine is referred to as a pup engine or cranking engine. Probably the most neglected service item on a two cylinder diesel next to checking flywheel torque & endplay. In spite of abuse they usually start in below 0F weather, preheat the diesel, allow cranking without fuel or compression until oil pressure is achieved and will rotate the diesel until it starts in cold weather. Operators who don't read the manual are noted for not performing service, warming the pup engine & engaging the diesel with the compression & fuel already "on". They are the same twits that then complain about repair costs & where to get a electric conversion kit. Price compare the cost of two large batteries every 2 or 3 years plus the initial conversion against a well kept pup engine over 20 years.

[Log in to Reply]  [No Email]
Here's a picture of mine...

03-11-2002 07:14:12




Report to Moderator
 Re: What is a pony motor? in reply to V., 03-10-2002 18:29:04  
third party image

Here's a picture of my pony or Cranking Engine from my 70 Diesel during the rebuild. Yet to have the manifold/carb/starter installed, it's a water-cooled, V-4, that shares coolant and exhaust heat with the big engine. It was particularly effective in starting the diesels in cold climates.

It was handy on the farm as we could depend on one tractor starting at zero or below !

Frank-in-Tallahassee
70D // 855

[Log in to Reply]  [No Email]
Brandon

03-10-2002 19:28:39




Report to Moderator
 Re: What is a pony motor? in reply to V., 03-10-2002 18:29:04  
The pony motors were small engines used to start the big two cylinder diesel engines. The first pony was an opposed two cylinder used on the Model R. On the rest of the diesel tractors, Deere changed to a V-4.

The pony motor seems like an OK system to me, although, I haven't had my 80 too long.

And a note-as far as I know, Deere built all of their pony motors.

Brandon

[Log in to Reply]  [No Email]
Tim(nj)

03-10-2002 18:53:59




Report to Moderator
 Re: What is a pony motor? in reply to V., 03-10-2002 18:29:04  
A little gasoline engine, (a V-4, I think), used on diesel 2-cylinders, like a 720, to crank over the main engine for starting. Some say they're more trouble than they're worth. Never had experience with one. The only 2-cylinder diesel I've ever been acquainted with was an electric-start 730. I wish I'd had the money to buy it when the owner sold out, but I was in college . . . .



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

Hop to:


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. [ About Us ]

Home  |  Forums


Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha ... [Read Article]

Latest Ad: IH model 8 Little Genius 2-12 rope trip plow on rubber. Plow is field ready. [More Ads]

Copyright © 1997-2022 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