Posted by Bob M on October 04, 2007 at 09:37:12 from (151.190.254.108):
In Reply to: H hourmeter posted by kerm on October 04, 2007 at 07:38:35:
Sounds like someone mounted a first generation Hobbs electric hour meter on the H. I doubt it’s original - the only IHC “factory” hour meter I’m aware on the letter series tractors is an odometer-style mechanical revolution counter, mounted sideways on the right side of the engine front cover.
John Deere however did use the clock type electric meter – I believe it was standard equipment on the model R…
Internally the hourmeter is essentially an electric solenoid-wound, balance wheel escapement type clock mechanism similar to 50’s era automobile dashboard clock, only calibrated to read in hours, tens and thousands.
Applying voltage to the hourmeter causes the solenoid to wind a small clockwork mainspring. The clock mechanism then runs for approx 2 - 3 minutes. Then as the mainspring is almost completely unwound, a set of contacts close and cause the solenoid re-wind the mainspring. The cycle repeats and the meter continues to run as long as voltage is applied to the hourmeter terminals.
----
If your H has distributor ignition easiest place to wire the hour meter is to the switched (coil) side of the ignition switch, or the ign switch side of the coil primary.
However if the tractor has magneto ignition you’ll need an alternative means to run the hourmeter. Probably the easiest is to add a “normally open” oil pressure switch - ie. one that’s contacts CLOSE upon sensing oil pressure. Then run a series circuit from a battery source (eg. hot terminal on the light switch) to the pressure switch and finally to the hourmeter.
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 - Tractor Profile: Allis-Chalmers Model G - by Staff. The first Allis-Chalmers Model G was produced in 1948 in Gasden, Alabama, and was designed for vegetable gardeners, small farms and landscape businesses. It is a small compact tractor that came with a complete line of implements especially tailored for its unique design. It featured a rear-mounted Continental N62 four-cylinder engine with a 2-3/8 x 3-1/2 inch bore and stroke. The rear-mounted engine provided traction for the rear wheels while at the same time gave the tractor operator a gre
... [Read Article]
Latest Ad:
Oliver 550 Diesel runs like a watch three point hitch pto engine gone threw about two hundred hours ago nice clean tractor
[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.