KZ1000J oil pressure sending unti

  • baldy110
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KZ1000J oil pressure sending unti

02 Feb 2013 22:11
#570459
Can someone explain how the above sending unit actually works. I know on most KZ engines the sending unit is made of metal and is grounded when it is screwed into the engine. The one wire on the sending unit is the ground for the oil light which is always hot. When the oil pressure builds the circuit is broken, this breaks the ground which turns out the light.
Now on the KZ1000J models the sending unit is plastic and there is only one wire coming from the sending unit. Since the housing is plastic it cannot ground to the engine, how is this circuit different from the others?

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  • wireman
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Re: KZ1000J oil pressure sending unti

02 Feb 2013 22:52 - 02 Feb 2013 23:16
#570466
Kzs use a plastic switch also on 900/1000 anyway B)

Attachment Oil20Pressure20Switch.jpg not found

posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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Last edit: 02 Feb 2013 23:16 by wireman.

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Re: KZ1000J oil pressure sending unti

02 Feb 2013 23:19
#570473
That's the one I am referring to.

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  • Patton
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Re: KZ1000J oil pressure sending unti

02 Feb 2013 23:22 - 02 Feb 2013 23:24
#570475
baldy110 wrote: Can someone explain how the above sending unit actually works. I know on most KZ engines the sending unit is made of metal and is grounded when it is screwed into the engine. The one wire on the sending unit is the ground for the oil light which is always hot. When the oil pressure builds the circuit is broken, this breaks the ground which turns out the light.
Now on the KZ1000J models the sending unit is plastic and there is only one wire coming from the sending unit. Since the housing is plastic it cannot ground to the engine, how is this circuit different from the others?



There is always connectivity between the plunger and the tip where the blue wire attaches, regardless of the plunger position (extended or compressed).

My best guess is that the extended plunger grounds against the engine case to provide a ground for the indicator bulb, being when the engine isn't running, or there's insufficient oil pressure.

And that oil pressure pushing the plunger upward interrupts the plunger's ground against the engine case, whereby the indicator bulb loses its ground.

Good Fortune! :)
1973 Z1
KZ900 LTD

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Last edit: 02 Feb 2013 23:24 by Patton.
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Re: KZ1000J oil pressure sending unti

02 Feb 2013 23:27
#570478
Thanks Patton that makes sense.

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