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Offline Seanocaoimh

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Low oil pressure light
« on: April 13, 2018, 04:38:43 PM »
Back again for more advice. The oil pressure light comes on at idle, but goes off again when I in crease the rpm to 2000.
 Any advice ( relevant), appreciated.
 

Offline KildareMan

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Re: Low oil pressure light
« Reply #1 on: April 13, 2018, 04:54:53 PM »
1. check your oil level (@cause it's easy to do)
2. check your oil pressure sensor.
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Offline AvgBear

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Re: Low oil pressure light
« Reply #2 on: April 13, 2018, 05:35:58 PM »
*Originally Posted by Seanocaoimh [+]
Any advice ( relevant), appreciated.
3. check oil pressure w/mechanical gauge: 49 psi @ 5K RPM (oil @ 80*C)
"Working on a motorcycle, working well, caring, is to become part of a process, to achieve an inner peace of mind.
The motorcycle is primarily a mental phenomenon."
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Offline Seanocaoimh

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Re: Low oil pressure light
« Reply #3 on: April 13, 2018, 06:42:26 PM »
thanks for the prompt reply lads, would ye think it would be ok to drive if I kept the revs up? why would the revs have a bearing on it and I assume the oil pressure valve is the sensor behind the head, and when removed the pressure  tester would screw in instead. Any idea where I could pick up the appropriate tester

Offline AvgBear

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Re: Low oil pressure light
« Reply #4 on: April 13, 2018, 07:54:17 PM »
*Originally Posted by Seanocaoimh [+]
I assume the oil pressure valve is the sensor behind the head, and when removed the pressure  tester would screw in instead.

Any idea where I could pick up the appropriate tester
Correct -- on top of the crankcase, behind the cylinders, under the throttle bodies.

An automotive parts store should either have one or can order one -- an adapter may be nec. (diff. threads/etc)?
"Working on a motorcycle, working well, caring, is to become part of a process, to achieve an inner peace of mind.
The motorcycle is primarily a mental phenomenon."
Robert M. Pirsig

Offline Seanocaoimh

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Re: Low oil pressure light
« Reply #5 on: April 13, 2018, 08:16:14 PM »
Great stuff! Any ideas about the idle speed illumination of oil light ? Only comes on when engine is warmed up and stopped at traffic lights / slow moving traffic. Should I not ride the bike until I have this problem sorted.

Offline Stevie.P

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Re: Low oil pressure light
« Reply #6 on: April 13, 2018, 10:11:05 PM »
First, are you sure of the age/condition of the oil, as in, it has definately been changed in line with the service schedule (i.e about 12 months/6k miles). If the oil is old, dirty and worn it will have thinned out which could give low idle oil pressure when hot. If in doubt renew it. :027:

I (personally) would (if happy about oil condition) go straight to eliminating the Oil Pressure Switch for the sake of 25 from Triumph before spending that amount or more on a pressure gauge .... that would be my next step if the new switch didn't clear the 'idle oil light'. :028:

Raising the 'idle speed' definately isn't the answer IMO. :151:
Also owned my 1979 Bonnie T140E from new!

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Offline Tiggerton

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Re: Low oil pressure light
« Reply #7 on: April 13, 2018, 11:30:41 PM »
Was the oil filter changed at your last service?
What is your bikes mileage, although oil pumps don't usually give up the ghost on modern triumphs.

I am just thinking that at low revs the oil circulating system may not be efficient.

I do bemoan the fact that oil and temperature gauges are no longer fitted to vehicles these days. They were a great early warning system.


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Offline Seanocaoimh

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Re: Low oil pressure light
« Reply #8 on: April 14, 2018, 05:00:13 PM »
I have everything stripped back and the low oil pressure sensor wire removed from the sensor. How do I test it to see if it works properly.as I say the oil light comes on at low rpm.

Online Rtwo

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Re: Low oil pressure light
« Reply #9 on: April 14, 2018, 05:41:29 PM »
I would think that the resistance @0 psi should be 10 ohms - that's all you can check with it off really.

 Can you clarify what the condition of the oil and filter is?

 
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