12H-t oil pipe Q?

[Christian]

Hi all

I've searched high and low, the FSM doesn't have the answer either...

My problem is I had an oil leak on the pipe going from the filter to the pump and from that to the timing cover.
This pipe has three banjo bolts on it, what I didn't pay attention to taking oit of, was that there's two banjo bolt with a big hole, and one with a small, but I'm unsure which goes where?

My guess is a big at the oil filter, another big at the pump, and as the pipe tapers down to the timing cover, the one with the small hole goes there.

Is this correct???

 

[lostmarbles]

Hi all

I've searched high and low, the FSM doesn't have the answer either...

My problem is I had an oil leak on the pipe going from the filter to the pump and from that to the timing cover.
This pipe has three banjo bolts on it, what I didn't pay attention to taking oit of, was that there's two banjo bolt with a big hole, and one with a small, but I'm unsure which goes where?

My guess is a big at the oil filter, another big at the pump, and as the pipe tapers down to the timing cover, the one with the small hole goes there.

Is this correct???

This is your vacuum pump that you're talking about Christian - Right?

If so, then I think it is the oil supply to it (for cooling, sealing & lubrication) that should be restricted leaving the return "free-flowing".

And this oil supply line is normally sized smaller making it easy to identify.

Are yours sized the same??

So I think the small-hole banjo bolt goes on the pump banjo that receives the oil supply (with all other banjo bolts unrestricted).

PS. So which vehicle in the herd is this anyway?

 

[roscoFJ73]

Its a 12HT ,I think its the only landcruiser engine with this set up. Its different to the 2H. Some diagrams on the epc under "oil pump"

 

[chappohj47]

The vacum pump on the back of the alternator if you need a pic I can do that for the lines

 

[watrob]

Hi all

I've searched high and low, the FSM doesn't have the answer either...

My problem is I had an oil leak on the pipe going from the filter to the pump and from that to the timing cover.
This pipe has three banjo bolts on it, what I didn't pay attention to taking oit of, was that there's two banjo bolt with a big hole, and one with a small, but I'm unsure which goes where?

My guess is a big at the oil filter, another big at the pump, and as the pipe tapers down to the timing cover, the one with the small hole goes there.

Is this correct???

Yes you are correct, the smallest holed banjo bolt goes to the timing cover, each bolt has a 2 copper washers. (front & Back of pipe fitting)

 

[Christian]

Thanks Watrob!

Btw. damn your engine looks good!
Mine are the direct opposite, it was in a car fire more than 10 years ago, sat in a barn and rusted since, so it looks like crap! But runs well

 

[lostmarbles]

OK... So I was on completely the wrong track with my post because this line really has nothing to do with your vacuum pump Christian....

I'm not familiar with the 12HT as you can see.

What does this oil line to the timing cover actually do then? (Rob/Christian?)

From what I can see in the FSM, that big cylindrical bulge in the timing cover (beneath the small-hole banjo) is where your automatic timer (driving the injection pump) sits.. So maybe this banjo just feeds a little oil to all your timing gears then????

(Of course the ordinary B-series and H-series engines have external oil lines feeding engine oil to their injection pumps but the feed to their timing gears is hidden internally.)

 

[Christian]

Hi Tom
You are right, you where wrong

Yes, it feeds in to the automatic timer housing, but that picture was not in my FSM? I have never seen it before, but it is just the right one.
But what surprises me a bit is that the parts no's. (15705A)are the same for the two banjos shown, which doesn't add up in my book?!?
Do you have more pictures? because I just had part 15133 out of the pump, and there was neither spring nor valve behind it?!?

 

[lostmarbles]

But what surprises me a bit is that the parts no's. (15705A)are the same for the two banjos shown, which doesn't add up in my book?!?

I can explain that at least..

15705A is not the real part number.

When you click on that it tells you that there are two different part numbers with No.1 being 90401-10006 and No.2 being 90401-10024.

..Do you have more pictures? because I just had part 15133 out of the pump, and there was neither spring nor valve behind it?!?

My first pic comes from the EPC.

That is apparently your oil pressure relief valve in your "timing gear case" so I'm guessing you must have the spring and valve beneath the cover-nut otherwise I doubt you'd have any oil pressure!

This is from the RM012E 2H/12HT FSM Christian:

So I guess you already have access to this one

 

[watrob]

The plug 15132 spring & valve does not go in the oil pipe fitting, the fsm does not display this area correctly. The small holed bolt goes into the timing cover. On a 2H this oil pipe does not continue to the front timing cover, on a 12HT its just to keep the auto timer oiled a little more, and as the oil flows thru the turbo on a 12HT this helps the oil circulation throughout the engine to keep the oil cooled, remember this engine has oil piston squirting as well, so oil movement is critical to help disperse heat.

 

[Christian]

Thanks guys! That was a relieve, I started thinking that valve and spring had jumped out while i was drinking coffee or something! Then everything is just as it should be!