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Oil pressure switch

Modern 961 Norton Commando Motorcycles

Oil pressure switch

Postby BPHORSEGUY » Tue Jul 18, 2017 6:34 am

Has anyone changed their switch? Is it under the cone shaped rubber cover behind the cylinders. How much is it. How difficult, I haven't found it in the manual yet!

BPHORSEGUY
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Re: Oil pressure switch

Postby BPHORSEGUY » Tue Jul 18, 2017 4:55 pm

25 views and not one reply. Do I have the rarest issues or what?

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Re: Oil pressure switch

Postby Raphi » Thu Jul 20, 2017 4:55 am

Changed every switch, except that one...
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Re: Oil pressure switch

Postby TonyA » Thu Jul 20, 2017 5:23 am

BPHORSEGUY wrote:Has anyone changed their switch? Is it under the cone shaped rubber cover behind the cylinders. How much is it. How difficult, I haven't found it in the manual yet!


Yes , that's it. Under the cone shaped rubber cover behind the cylinders. I remember you having a little flicker of the light at idle ? Have you tried the different oil ?

TonyA
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Re: Oil pressure switch

Postby BPHORSEGUY » Thu Jul 20, 2017 6:01 am

I hadn't tried different oil yet, Factory said it is a sticky switch. Problem is a different one, on first start of day it sometimes takes 10-15 seconds for lite to go out. Subsequent starts are instant or 1-2 seconds.

BPHORSEGUY
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Re: Oil pressure switch

Postby TonyA » Thu Jul 20, 2017 12:31 pm

I agree , Replace it.

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Re: Oil pressure switch

Postby Fultonrn » Sat Jul 22, 2017 3:44 pm

Mine is exactly the same . If not started for a few days the oil pressure warning light takes as you say a few seconds to go out and the engine is noisy , hydraulic tap pets, etc., until oil circulates.
The longer time , days , weeks, months , between start the longer , slightly, it takes for the oil light to go out .
Similarly at oil changes it takes even longer for the light to go out as the pump must fill oil lines that were drained and oil filter, etc. Before pressure can be built up.
This is normal on any engine unless as in some vehicles the complete oil system is primed by external means.
The oil drains from the top components down and the longer a vehicle is left unstated the longer on some systems without non return valves, etc., the longer it takes to build up oil pressure.
It also depends on where in the oil system the pressure switch is. Immediately after the pump pressure outlet the quicker it will go out.
As long as it does not take longer than say 30 seconds personally I see no problem BUT one must wait till the light goes out before using the throttle.
On older vehicles the trick was to turn over the engine until the oil light went out which out using the choke or not auctioning the ignition system before allowing the engine to fire up thus preventing component wear from no oil pressure.
After the first start the oil system will be primed and subsequent starts will result in quick oil light going out.
If it is agreed you have a problem so do I but as yet I do not think I have but still do not like the noises until the light goes out.

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Re: Oil pressure switch

Postby TonyA » Sat Jul 22, 2017 6:36 pm

Hello , I have only had the noisy tappets first start after an oil change when the oil filter compartment is empty . Never noisy again until next oil change. You are saying then that after a few days of sitting you are getting the noisy tappets when you start ? Does Bphorseguy do the same ? Are your Tappets noisy after a few days/1 week of sitting ? I just went out and started my bike and it has not been driven in 24 hours . I paid close attention to the oil pressure light . First start took about 5 seconds (1 Mississippi , 2 Mississippi ... ) to clear oil pressure light and then goes out right away if I turn it off and start it again . This seems normal and OK to me. I do not hear the noisy tappets like I would get with an empty oil filter though. Maybe you guys should check the adjustment of your lifter/rockers ? Can't hurt to make sure you have the 2.25 turns in from just touching and not the 1 turn previously written in the manual. This may be a solution for the noisy tappets at startup. Also you can check your oil pressure just before you replace that oil pressure switch.

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Re: Oil pressure switch

Postby BPHORSEGUY » Sat Jul 22, 2017 7:10 pm

I have only normal noises when my bike starts regardless of if the lite goes out quickly or 10 seconds later. I fully understand it is a dry sump system and must "pump up" But mine seems to take longer then most. My bike does sit for long periods because I have a garage full of bikes. I am glad to hear at least one other 961 does this. anybody else?

Also I have disconnected the oil line from the pump and the pump pumps oil from the very first crank of the starter!

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Re: Oil pressure switch

Postby TonyA » Sat Jul 22, 2017 7:42 pm

Hello Again , Then it is just a question of how long it takes to clear the oil pressure light after say a week of no starting. Well then lets just time it and put this to rest. I probably wont ride my bike again after tomorrow until next weekend. Then when I start it again I will time this and so should you but accurately . Then lets report back with our data. You may not have anything wrong at all.

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Re: Oil pressure switch

Postby BPHORSEGUY » Sun Jul 23, 2017 10:13 am

Tony, I have done this accurately and can report it takes 10-12 seconds on a stopwatch. Much of my timing was done in colder weather. I am using the recommended Silkolene oil. I do not know if my bike has done this since new or not. :shock: I developed the bad habit of concentrating on the tachometer since before the bike was remapped it would usually stall on the first start and I would stare at the tach ready to prevent a stall. Just this past February I noticed the lite issue since I finally quit looking at the tach on first start. The Norton is not my daily rider ( it is reserved for special occasions ) so most of my first starts are after a layup period. I do not want to start changing things if unnecessary because the bike so far has been trouble free except for remapping. I am going to order the switch anyway just to have, it is not expensive, about 10 bucks

Back when it was cold, Iwilson generously tried to help me with this though it was summer where he is located. He also informed that there are 2 different oil pumps. He tried the lower volume oil pump to help cure the oil in the airbox problem. From what I understood too much oil flow caused excessive vaporization and the oil box problem. With the lower volume pump he had no need of the factory kit for this issue. He is a very astute guy in my opinion. Since I never had an issue with the airbox, I have wondered for months if my bike has the lower volume pump. His bike does not take as long as mine to extinguish the lite though. You may remember the video he posted here to show the strong idle he had on startup after his remap and ECU work. That video was a result of his efforts to help me!

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Re: Oil pressure switch

Postby TonyA » Sun Jul 23, 2017 12:35 pm

Give me until next week and I will give you the time it takes to turn off the oil light at first start after a week of not riding. Have you tested after 24 hours or even 8 hours ?

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Re: Oil pressure switch

Postby BPHORSEGUY » Sun Jul 23, 2017 1:28 pm

Yes I have tested after 8hrs about 5-6 seconds, after 24 about 8-9 seconds and it slowly seems to build from . Of course there are variables such as temp and type of oil used. I once added a small amount ( 1 or 2oz. ) of oil after a layup and the lite went out almost instantly after start like a hot start even though the engine was actually 40 degrees F.

BPHORSEGUY
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Re: Oil pressure switch

Postby TonyA » Sun Jul 23, 2017 3:01 pm

That last statement makes me think you are wet sumping a lot of oil from the tank. Look into your oil tank and see if there is any oil on your stick (Before you start) . If not , this may be the reason that it is taking so long for you to get the oil light out. The oil has to be pumped back to the tank from the sump , then down to the pump from the tank . In fact this is beginning to make sense. You never did get the breather oil check valve update did you ? This will stop the wet sump issue. And after a week of just sitting there will still be oil on the stick and problem solved.

TonyA
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Re: Oil pressure switch

Postby BPHORSEGUY » Sun Jul 23, 2017 5:12 pm

Tony, I do not understand, please set me straight. I thought per the manual, the factory, and many many users that the oil level should fall to the bottom of the stick or even below after an hour or so because of the dry sump system. This is the reason for the run it or you can't check the oil level routine! I have not heard of wet sumping since the 70's!! While I will admit I never studied the oil in the airbox fix, I thought it was mostly external hardware. I thought it was to fix the oily airbox issue not to prevent "wet sumping". The fix wasn't availabe for several years, why did no one notice wet sumping issues during all those years?? The time I added oil and the lite came on quicky I chalked up to the pump having to pump up less oil! To this day I believe very few bikes had the update.

Everyones bike takes several seconds to "pump up" the oil on a cold start, due to the dry sump design, Mine takes several seconds longer especially after sitting for days or more. Once again please educate me on what you think is happening and why the oil box fix ( if that is what you are referring to ) would help!

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