Author Topic: check oil pressure with oil sending unit?  (Read 936 times)

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Offline killersoundz

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check oil pressure with oil sending unit?
« on: July 05, 2012, 10:14:12 AM »
I stripped all the wiring off my bike. Don't have a pressure gauge yet but I want to start er' up. Can I put a meter on the oil sending unit and be able to see when it pops above the 7.5lbs?
My project thread:

http://forums.sohc4.net/index.php?topic=107447.0

My CB750K4 Starting up for the first time after a seized motor and rebuild!


Offline MCRider

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Re: check oil pressure with oil sending unit?
« Reply #1 on: July 05, 2012, 10:16:45 AM »
I stripped all the wiring off my bike. Don't have a pressure gauge yet but I want to start er' up. Can I put a meter on the oil sending unit and be able to see when it pops above the 7.5lbs?
Not my strong suit. But no pressure should show continuity. Pressure will break the circuit and no continuity.
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline killersoundz

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Re: check oil pressure with oil sending unit?
« Reply #2 on: July 05, 2012, 10:18:48 AM »
I stripped all the wiring off my bike. Don't have a pressure gauge yet but I want to start er' up. Can I put a meter on the oil sending unit and be able to see when it pops above the 7.5lbs?
Not my strong suit. But no pressure should show continuity. Pressure will break the circuit and no continuity.


Ok coolio. That's what I figured something like that
My project thread:

http://forums.sohc4.net/index.php?topic=107447.0

My CB750K4 Starting up for the first time after a seized motor and rebuild!


Offline brooze72

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Re: check oil pressure with oil sending unit?
« Reply #3 on: July 05, 2012, 10:28:51 AM »
No, as far as I know the senders are not analogue ouput units, just a switch that turns off when a preset pressure is reached.
2011, 2012 & 2013 Godzilla Relay Rally Rider
"Hold on loosely...don't let go
 If you cling too tightly...you're gonna lose control"
1972 CB500K1 - restored rider
1981 CB650C - new project

Offline MCRider

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Re: check oil pressure with oil sending unit?
« Reply #4 on: July 05, 2012, 10:55:50 AM »
No, as far as I know the senders are not analogue ouput units, just a switch that turns off when a preset pressure is reached.
Wouldn't a continuity tester show continuity when hooked up, then deflect when the switch turns off, from pressure?

An idiot light with its own power source?
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline brooze72

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Re: check oil pressure with oil sending unit?
« Reply #5 on: July 05, 2012, 11:06:01 AM »
No, as far as I know the senders are not analogue ouput units, just a switch that turns off when a preset pressure is reached.
Wouldn't a continuity tester show continuity when hooked up, then deflect when the switch turns off, from pressure?

An idiot light with its own power source?

Yes that's right, it is a normally closed switch.
2011, 2012 & 2013 Godzilla Relay Rally Rider
"Hold on loosely...don't let go
 If you cling too tightly...you're gonna lose control"
1972 CB500K1 - restored rider
1981 CB650C - new project