Farm Equipment - Hour Meter Install

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Hour Meter Install

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=15593
Printed Date: 04 Feb 2025 at 3:14pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Hour Meter Install

Posted By: Brian G. NY
Subject: Hour Meter Install
Date Posted: 23 Jul 2010 at 12:43pm

I want to install an hourmeter on my WD-45.

I would like to go the extra step and wire it so that it reads only when the engine is running rather than whenever the ignition is turned on.

I know they can be wired thru an oil pressure switch to accomplish this.

Would a common low oil cutoff switch from a portable generator or such work for this?

Does the WD-45 provide enuf pressure to close the points on one of those switches?

Should I just hook it into the ignition and forget it? LOL

Thanks for any help.

Replies:

Posted By: kip in cny
Date Posted: 23 Jul 2010 at 1:21pm

I would just wire it so when the key is on alot less work.

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160 CA 920diesel 5020 HD-3

Posted By: M Diesel
Date Posted: 23 Jul 2010 at 4:14pm

A cutoff should work unless the idle pressure is down there a ways. I use a fuel pump safety switch. Those can be had down to 5 psi or so with a regular npt fitting. Not hard to do.

Posted By: Coke-in-MN
Date Posted: 23 Jul 2010 at 4:42pm

Go the extra and put a pressure switch in, you will not regret it as you will have accurate reading on hours.

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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."

Posted By: Stan R
Date Posted: 23 Jul 2010 at 4:45pm

What would you expect the time difference be from Key on ONLY vs KEY on/ Engine On? I would suspect the difference would be insignificant and not justifiable to go beyond connecting it thru the key switch, so why bother.

Posted By: Chris/CT
Date Posted: 23 Jul 2010 at 5:41pm

I have a AC [ what I think is an AC part] Hour meter if interested. I do not know if it is functional, e-bay purchase years ago, have no use for it.

Posted By: Jacob (WI,ND)
Date Posted: 23 Jul 2010 at 8:08pm

Here is another post about this, might help

http://www.allischalmers.com/new/forum/forum_posts.asp?TID=12787&KW=hour+meter&PID=96462&title=adding-an-hour-meter-to-your-tractor-how-to#96462 - http://www.allischalmers.com/new/forum/forum_posts.asp?TID=12787&KW=hour+meter&PID=96462&title=adding-an-hour-meter-to-your-tractor-how-to#96462

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Jacob Swanson
1920 6-12; 1925,1926 20-35 longfenders; 1925,1926 15-25's; 1927,1929 20-35 shortfenders; C; B's; IB; WC's; WD; WD45

Posted By: firebrick43
Date Posted: 24 Jul 2010 at 12:36am

Google Tiny tach. They have some good hour meters that record only when the engine is firing. They have one wire that attaches to ground and one sense wire that wraps around a spark plug wire. This wire tell the hour meter that the engine is running and measures rpm. They are self powered by a battery and they can be mounted out of site with double sided tape or epoxy glue to not affect the original look or dash, or mounted in the open. They also give you an rpm read out to adjust your governor and idle speed. One model even has service reminders.