Part #3 - Oil pressure

[Soundguy]

</font><font color="blue" class="small">( Is that normal or just a lot of room between the bearings and the journals?
)</font>

Yes and yes /forums/images/graemlins/grin.gif

Yep.. it's well worn in its 59 years of service, and yep.. that's pretty much normal.

ideally, new, the pressure would have been 34-40 cold, depending on how accurately the bypass spring was set ( 34 was suposedly 'bypass point'.. but it's not uncommon to see 40 psi cold on an otherwise oem engine ). Anyway.. and then 25-34 for running. My 8n drops to 20 at hot idle. And is cold at 40. i consider that 'great'. My 2n is 18/10 or 8 and that is well worn but serviceable. In fact.. we N people pretty much consider 6psi hot idle to still be 'working' pressure. My Naa and 660 both start up around 50 cold.. and go to 40 hot 9 their oil bypass was set higher than the N's. ).

Oem N engine was a 4 cyl flat head. Crank had renewable bearing shells.. but cam ran bare in the block.. that's where alotta oil pressure goes...

Soundguy

 

[GaryE]

You got it!

Gary

 

[GaryE]

<font color="blue">Oem N engine was a 4 cyl flat head. Crank had renewable bearing shells.. but cam ran bare in the block.. that's where alotta oil pressure goes... </font>


It is amazing how that old iron Just keeps going!

Gary

 

[Mith]

drained oil, balack as the night, but no water /forums/images/graemlins/grin.gif /forums/images/graemlins/laugh.gif

problem is.....can get the filter undone, it is just a normal undoing?, just wont budge
any ideas on size of spanner to use, 20mm 22mm 7/8 and next one down from 7/8 dont fit /forums/images/graemlins/confused.gif
thanks man

 

[GaryE]

Mith,

It is not uncommon for the oil from a diesel engine to be full of soot, not a big deal. As for the filter, it should not be all that hard to come out unless it has not been removed for a while. I can not get to the B6000 right now, it is buried in the barn. But if I remember correctly it was around 7/8". And it is a standard thread. I just use a box wrench on it. If it won't budge, maybe try some gentle heat. I would start with a heat gun not a torch.

Hope this helps,

Gary

 

[DaMadman]

</font><font color="blue" class="small">( <font color="blue">Oem N engine was a 4 cyl flat head. Crank had renewable bearing shells.. but cam ran bare in the block.. that's where alotta oil pressure goes... </font>


It is amazing how that old iron Just keeps going!

Gary )</font>

I is funny you said that. It reminded me of the 40's army jeep my grandfather worked on. when he got it the engine was locked up. He took the head off and put penetrating oil all over the top of the pistons and finally broke it free. Then he sanded (with sandpaper) the inside of the cylinder and the outside of each piston and that dang jeep is still running and doesn't burn all that much oil.
Made as a throw away vehicle and you can keep them running like that.

K.I.S.S. is a good moto

 

[Mith]

OK im progressing, got the filter out. had to jack the whole thing off the ground 1 1/2 foot and get a scaffold pole to put on the wrench it was so tight /forums/images/graemlins/mad.gif /forums/images/graemlins/laugh.gif
anyway, whats the plan on cleaning it. it isnt really that dirty atall which is a pity cos that would be an easy fix /forums/images/graemlins/frown.gif
pulled the switch, test it tomorrow.

 

[GaryE]

<font color="blue"> whats the plan on cleaning it </font>

I use Break Parts Cleaner, but kerosine will work just fine. While you have it out, make sure the rubber seals (O rings if I remember correctly) are in good shape. If not, this could cause low oil pressure.

BTW, when you replace the filter, you should not use the same "scaffold pole" !!!


Gary

 

[Mith]

ummm, which O rings
we may have found a problem. where are they on the filter? i can take a pic of it tomorrow if this helps
kerosine is hard to come by, brake cleaner will be the one, just dunk it right.

i was planning on doing the filter up as tight as a plain wrench would allow
maybe it was overtightened to make up for the lack of O rings to prevent it leaking?

thanks, dunno what id do without ya
hey id still be thinking the light was an ignition light /forums/images/graemlins/shocked.gif
cheers

 

[GaryE]

It is an O ring, just checked the parts manual. It either is on the filter or is still in the block.... or it is missing. This might be part of the problem. If I remember the O ring is to hold pressure around the filter and to stop the oil from bypassing. But it has been a while since I have really looked at it. If need be, I will go out tomorrow and pull mine out to look. I have to change the oil in it anyway, I just sold it!

I would still go ahead and check the switch.

Gary

 

[Mith]

You just sold it, hope you got a good price /forums/images/graemlins/laugh.gif

heres a pic of the filter. i see now a seal right on the end near the bolt head. should there be any more? but this seal wouldnt stop the oil from bypassing.....

i will check the switch, all in good time, im trying to split my time between getting 2 rideons ready for mowing, proabably starting tomorrow, and fixing this. Also making brush guards for it.

Thanks fro your help

 

[GaryE]

<font color="blue"> hope you got a good price </font>

Not really, I sold it to a neighbor up the road. He helps me out every now and then when I need some heavy duty welding done. So it is a fair deal in the long run!

<font color="blue"> should there be any more </font>

I really don't remember, but I think your oil filter looks correct. I will yank mine out this afternoon if I get a chance, if not I will get to it tomorrow for sure. Clients are driving me crazy today!!!!!

Gary

 

[Mith]

Gary thanks, no rush though, gotta keep your clients happy /forums/images/graemlins/blush.gif.
cheers

 

[Mith]

cleaned it all down with brake parts cleaner - that stuff is legendary, you squirt and watch the grime run off - far, far better than WD-40
lookin good now, leavin it to evaporate off.
cant find the compressor so testing the switch will have to wait till it turns up or whatever.

Got offered a job with it cutting a 1 acre field yesterday, pity it wont work yet /forums/images/graemlins/frown.gif /forums/images/graemlins/mad.gif
thanks

 

[GaryE]

Mith,

Took a look at my filter last night and it looks like you have everything. Two things you might try. First try to spray down the inside of the oil pressure switch with some Break Parts Cleaner. (that stuff is handy!) See if any gunk comes out.... Let it dry real good before you reinstall it. That stuff will take the oil off the bearing real quick as you can see.

Second, before you reinstall it just see if you can trip the switch by blowing in it, use a volt ohm meter to test it. I was able to trip mine that way yesterday. It did not take much effort. But I have been called a blow hard before!!!!!! I just used a short piece of fuel line I had hanging around.

Hope this helps,

Gary

 

[Mith]

Cheers, sprayed that cleaner stuff down it, a load of black goo came out, mainly all over a clean shirt i had on /forums/images/graemlins/mad.gif /forums/images/graemlins/mad.gif
whats the bolt on the end of the filter for (the other end to the one that you use to take it out).
loadsa rubbish came out the filter too
a can of the cleaner cost £5, used about 1/2, used it to de-sieze a toplink end, worked like a charm /forums/images/graemlins/grin.gif
thanks for all your help, ill try the switch tomorrow, found the compressor too, it had been taken for a ride

 

[GaryE]

With a little luck that "load of goo"was clogging that switch.

I think the bolt you are talking about is the one that holds the assembly together.

Once you start using Break Parts Cleaner it can become addictive.....


Gary

 

[Mith]

thanks, yea, hopefully the goo was the problem
after i try the blowing into the switch plan i will put it back together and try it depending on the outcome.
dunno what ill do if the lights still on. where is the pump anyway? /forums/images/graemlins/crazy.gif
need to start working it, losing money on it so far.....
thanks

 

[GaryE]

<font color="blue">where is the pump anyway? </font>

Looks like it is behind the front engine cover. Never been that deep. Manual say's it is item #20.

Gary

 

[Mith]

Not sure if i really wanna go there /forums/images/graemlins/crazy.gif