TDM Pressure Gauge

[Guest]

<!--quoteo(post=22323:date=Mon 20th Nov 2006, 11:17 AM:name=masterbrewer)-->QUOTE(masterbrewer @ Mon 20th Nov 2006, 11:17 AM) <{POST_SNAPBACK}><!--quotec-->

Here's some pics of my oil pressure gauge already on the bike when I got it

Oil pressure dash light just left of the neutral light where there is normally no light.

Oil pressure sender

With all the talk of oil use I made up a way to carry extra oil away from normal luggage using 90mm PVC tubing.

Oil bottle &/or anything else that will fit in the carrying tubes ie puncture repair stuff, tools, beer cans etc

PVC luggage tubes

Cheers<!--QuoteEnd--><!--QuoteEEnd-->

where the oil pressure sender is screwed into, is just the return gallery from the used oil from the cams
It falls back down to the bottom of the engine by gravity, ready to tbe pumped to the tank

You are not measuring oil pressure here.

Can't you tap in to the oil feed line to the cams somehow, by replacing the banjo bolt that comes from the top of the crankcase to the top right raer of the cylinder head.

[masterbrewer]

GuyGraham

If the sender is placed in just a return gravity fed oil gallery, then why does it act like there is pressure in the gallery?

Cheers

[Guest]

<!--quoteo(post=22378:date=Mon 20th Nov 2006, 08:18 PM:name=masterbrewer)-->QUOTE(masterbrewer @ Mon 20th Nov 2006, 08:18 PM) <{POST_SNAPBACK}><!--quotec--> GuyGraham

If the sender is placed in just a return gravity fed oil gallery, then why does it act like there is pressure in the gallery?

Cheers

<!--QuoteEnd--><!--QuoteEEnd-->


dunna know, but thats the bolts Yam tell you to remove after an oil change to see if oil is circulating.

When you'e got the cambox cover off, you can see the top of this oil gallery in the cylinder head as it is at the front left side.

If you look at the oil flow diagrams in the WSM you can see that the only feed to the top of the head is from the pipe that joins at the rear right of the cylinder head, this feeds the cams, and then the oil returns to the sump under gravity via this passage, or cam chain tunnel

[dandywarhol]

Maybe it's reading engine breather pressure
Gee gee is right about that point on the head though.........you open that to see if oil is circulating and the pressure there is minimal if it exists at all

This post was last modified: 20-11-2006, 09:24 PM by dandywarhol.

[masterbrewer]

Hope it's not too much breather pressure

But the breather hose from the cam cover to the airbox is clear, which I think would negate any pressure build up.

Mmmmmm?????? interesting

[steveglover]

<!--quoteo(post=22334:date=Mon 20th Nov 2006, 12:30 PM:name=GuyGraham)-->QUOTE(GuyGraham @ Mon 20th Nov 2006, 12:30 PM) <{POST_SNAPBACK}><!--quotec-->where the oil pressure sender is screwed into, is just the return gallery from the used oil from the cams
It falls back down to the bottom of the engine by gravity, ready to tbe pumped to the tank
You are not measuring oil pressure here.<!--QuoteEnd--><!--QuoteEEnd-->
In the 900 WSM you can see that that bolt is definitely at the end of the high pressure oil gallery that feeds the front camshaft bearings. So it does carry high pressure oil.

<!--quoteo(post=22390:date=Mon 20th Nov 2006, 09:08 PM:name=dandywarhol)-->QUOTE(dandywarhol @ Mon 20th Nov 2006, 09:08 PM) <{POST_SNAPBACK}><!--quotec-->Maybe it's reading engine breather pressure
Gee gee is right about that point on the head though.........you open that to see if oil is circulating and the pressure there is minimal if it exists at all<!--QuoteEnd--><!--QuoteEEnd-->
Agreed, oil just trickles out. But the reason is (probably) that the oil passes through a restrictor (a tiny hole to you and me), which reduces the pressure as oil flows through it. If you reduce the flow rate to zero by blocking the hole on the outside of the engine then the pressure will build up to be the same as in the oil gallery.

The problem of using an oil pressure guage at this point is that the restrictor will probably slow down the action of the pressure guage to an unacceptable degree.

[ehakun]

<!--quoteo(post=22502:date=Wed 22nd Nov 2006, 12:23 AM:name=SteveGlover)-->QUOTE(SteveGlover @ Wed 22nd Nov 2006, 12:23 AM) <{POST_SNAPBACK}><!--quotec-->In the 900 WSM you can see that that bolt is definitely at the end of the high pressure oil gallery that feeds the front camshaft bearings. So it does carry high pressure oil.
Agreed, oil just trickles out. But the reason is (probably) that the oil passes through a restrictor (a tiny hole to you and me), which reduces the pressure as oil flows through it. If you reduce the flow rate to zero by blocking the hole on the outside of the engine then the pressure will build up to be the same as in the oil gallery.

The problem of using an oil pressure guage at this point is that the restrictor will probably slow down the action of the pressure guage to an unacceptable degree.<!--QuoteEnd--><!--QuoteEEnd-->

Right!!!
That's the reason I used the lower left banjo bolt!!! I measure the oil pressure using 1 bar pressure gauge and it seems to work just fine I'll add my conclusions in a few days right after I'll finish checking the behavior of the pressure gauge.

[dapleb]

<!--quoteo(post=22727:date=Thu 23rd Nov 2006, 02:27 PM:name=teedeemmm)-->QUOTE(teedeemmm @ Thu 23rd Nov 2006, 02:27 PM) <{POST_SNAPBACK}><!--quotec-->I'll add my conclusions in a few days right after I'll finish checking the behavior of the pressure gauge.<!--QuoteEnd--><!--QuoteEEnd-->

How will you identify the behaviour of the pressure guage when the bike is low on oil?

Boop
dapleb

This post was last modified: 23-11-2006, 04:59 PM by dapleb.

[amarko5]

<!--quoteo(post=22738:date=Thu 23rd Nov 2006, 04:43 PM:name=dapleb)-->QUOTE(dapleb @ Thu 23rd Nov 2006, 04:43 PM) <{POST_SNAPBACK}><!--quotec-->How will you identify the behaviour of the pressure guage when the bike is low on oil?

Boop
dapleb<!--QuoteEnd--><!--QuoteEEnd-->

am i missing something here why not just fit a low level indicator in the oil tank ?? as the 900 has ?

[alan]

<!--quoteo(post=22770:date=Thu 23rd Nov 2006, 08:24 PM:name=amarko5)-->QUOTE(amarko5 @ Thu 23rd Nov 2006, 08:24 PM) <{POST_SNAPBACK}><!--quotec-->am i missing something here why not just fit a low level indicator in the oil tank ?? as the 900 has ?<!--QuoteEnd--><!--QuoteEEnd-->


I was thinking of that aswell !

[wicklamulla]

would it be possible to use a TDM 900 oil tank on mkI's and MKII's by removing the respective existing oil tanks ?? as the 900 one has an oil level sensor ??

[Guest]

<!--quoteo(post=22502:date=Tue 21st Nov 2006, 10:23 PM:name=SteveGlover)-->QUOTE(SteveGlover @ Tue 21st Nov 2006, 10:23 PM) <{POST_SNAPBACK}><!--quotec-->In the 900 WSM you can see that that bolt is definitely at the end of the high pressure oil gallery that feeds the front camshaft bearings. So it does carry high pressure oil.<!--QuoteEnd--><!--QuoteEEnd-->

Yeah but This is an 850, not the gayman's bike

[steveglover]

<!--quoteo(post=23676:date=Sun 3rd Dec 2006, 07:45 PM:name=GuyGraham)-->QUOTE(GuyGraham @ Sun 3rd Dec 2006, 07:45 PM) <{POST_SNAPBACK}><!--quotec-->Yeah but This is an 850, not the gayman's bike <!--QuoteEnd--><!--QuoteEEnd-->
I've heard the 900 called gay (many times) but I think thats the first time I've heard someone call it "the gayman's bike", with the inference that all 900 riders are gay.

[Histamiini]

<!--quoteo(post=23619:date=Sun 3rd Dec 2006, 03:46 PM:name=wicklamulla)-->QUOTE(wicklamulla @ Sun 3rd Dec 2006, 03:46 PM) <{POST_SNAPBACK}><!--quotec-->would it be possible to use a TDM 900 oil tank on mkI's and MKII's by removing the respective existing oil tanks ?? as the 900 one has an oil level sensor ??<!--QuoteEnd--><!--QuoteEEnd-->


I don't know about fitting a different oil tank but back when my bike was burning oil I thought about making sort of a level sensor.
I think one could fit a small float on the dipstick, or preferably something like this temperature gauge and wire it so that it shorts a circuit when the float drops low enough. It would then light a simple dummy light. I do realise that the float would have to be small to fit through the hole on the tank and wires on the dipstick would be a pain.