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Hour Meter Install
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Brian G. NY View Drop Down
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Joined: 12 Sep 2009
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Points: 2244 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian G. NY Quote  Post ReplyReply Direct Link To This Post Topic: Hour Meter Install
    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.
 
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kip in cny View Drop Down
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Joined: 29 Nov 2009
Location: Jordan NY
Points: 538 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kip in cny Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2010 at 1:21pm
I would just wire it so when the key is on alot less work. 
160 CA 920diesel 5020 HD-3
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M Diesel View Drop Down
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Joined: 26 Feb 2010
Location: Las Vegas
Points: 128 		Post Options Post Options   Thanks (0) Thanks(0)   Quote M Diesel Quote  Post ReplyReply Direct Link To This Post 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.
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Coke-in-MN View Drop Down
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Joined: 12 Sep 2009
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Points: 41758 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post 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.
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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Stan R View Drop Down
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Points: 963 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Stan R Quote  Post ReplyReply Direct Link To This Post 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.
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Chris/CT View Drop Down
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Joined: 11 Sep 2009
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Points: 1939 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Chris/CT Quote  Post ReplyReply Direct Link To This Post 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.
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Jacob (WI,ND) View Drop Down
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Joined: 11 Sep 2009
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Points: 1247 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jacob (WI,ND) Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2010 at 8:08pm
Here is another post about this, might help
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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firebrick43 View Drop Down
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Joined: 10 Dec 2009
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Points: 592 		Post Options Post Options   Thanks (0) Thanks(0)   Quote firebrick43 Quote  Post ReplyReply Direct Link To This Post 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. 
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