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Jacob (WI,ND) 
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Joined: 11 Sep 2009
Location: Kenmare, ND
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 Topic: Adding an hour meter to your tractor. How to.
Posted: 22 May 2010 at 10:11am |
Seen this over at the YTmag site, and remembered the post about the non functional hour meter on Lou's tractor. Thought others may be interested. Really quite simple I guess.
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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
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M Diesel
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Joined: 26 Feb 2010
Location: Las Vegas
Points: 128
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Posted: 22 May 2010 at 3:56pm |
Even better, for diesels or mag machines you can add one of these.
They are called fuel safety switches. They open below the cut off pressure. Plumb it into your oil pressure line, wire it into one of the leads going to your hour meter and you are set to go. It automatically cuts off the hour meter when oil pressure drops.
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Steve in NJ
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Joined: 12 Sep 2009
Location: Andover, NJ
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Posted: 23 May 2010 at 9:52am |
Hour meters come in a number of different sizes. Here's one that I used for the IB. I mounted it in the Battery box so I can keep an eyeball on it. Being the IB is Distributor fired, it's energized via the key off the Ignition side of the circuitry. Works neat! 
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Jeff Z. NY
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Posted: 23 May 2010 at 9:55am |
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Looks good Steve. Some would think it's factory.
Nice Job!!!
Have you ever seen it rain dirty water??? LOL
Maybe their talking rain without the cat's and dog's in it.
Edited by Jeff Z. NY - 23 May 2010 at 9:58am
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Coke-in-MN
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Location: Afton MN
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Posted: 23 May 2010 at 10:04am |
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Problem with powering off the key switch without another switch inline to control electric is when key is left on hour meter runs. Found this out on diesel units where someone killed the engine and never turned off the key. Use a GM style oil pressure switch in circut now to ground unit.
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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."
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M Diesel
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Location: Las Vegas
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Posted: 27 May 2010 at 5:47pm |
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Is that a newer style switch? Don't the old ones close when pressure goes away, turning the lamp on? (I haven't looked at a GM in a long time.) If there is one that is closed when pressured I'd like to find it. Maybe it's time to grab a meter and visit the parts store.
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Brian G. NY
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Posted: 23 Jul 2010 at 9:30pm |
Now that I see that fuel pressure "safety" switches are common and relatively cheap, the obvious question is: why couldn't one of these switches be plumbed into the oil pressure line instead?
BTW, I have a Stewart-Warner "HOBB" hour meter that I picked up at a yard sale for a buck. It already had 541.4 hours on it but I hooked it up for a few hours and it seems to work perfectly. The only imperfection I can see is what appears to be some very fine "weld spatter" in the glass face.
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JoeO(CMO)
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Location: Cent Missouri
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Posted: 24 Jul 2010 at 5:03am |
I had a mid 70's GM economy car that had a oil pressure switch/electric fuel pump combo.--if you lost oil pressure, it would not supply fuel to engine.
This would work on engine in oil pressure plumbing to supply voltage for hour meter.
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Steve in NJ
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Posted: 24 Jul 2010 at 9:48am |
The main reason why I didn't bother with a OPS for control is because right behind the Battery box between the box and the rear tire is one of my Battery sever switches w/illuminating ID lites to remind me the system on board the Tractor is powered up. I'm in the habit of getting off the Tractor and walking around and shutting off the system. JoAnna is in the habit of that now to... 
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firebrick43
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Posted: 24 Jul 2010 at 3:58pm |
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Google Tinytach. They are self contained and have two wires. One is a ground and one is a sense wire that wraps around a spark plug wire. It displays RPM and hours and only measures hours when running. Can be easily mounted out of sight, so you don't have to cut a hole for a hobbs meter.
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Larry(OH)
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Posted: 25 Jul 2010 at 9:08am |
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Steve, that looks like the hour meters on all our bucket/line trucks here that Altec supply us:)
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'40 WC puller,'50 WD puller,'50 M puller '65 770 Ollie
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I can explain it to you, BUT I cannot understand it for you!!
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Steve in NJ
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Posted: 25 Jul 2010 at 3:12pm |
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Larry! Shhhhhhh!!!! LOL! Actually, its a Napa-Japa from my local Napa store.... Our bucket trucks here sport the generic round style. Problem is, they don't go up high enough with the Bizzillion hours on our trucks that we have. The trucks are ready for the scrap yard, but I keep em' together with bubble gum, hydraulic hose, and bailing wire! LOL!
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