Oil Pipe Junction Block - Page 3 - Triumph Forum: Triumph Rat Motorcycle Forums
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post #21 of 33 (permalink) Old 09-10-2016, 01:44 PM
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Originally Posted by o1marc View Post
When speaking of front or rear it is usually describing the front of the bike or the rear of the bike. When talking about a V twin bike, you don't say the left or right cylinder because you're standing next to it. Apology accepted.
True... but I wasn't really talking about a motorcycle. I was referring to the photograph of the pipe/manifold assembly you posted. If you were holding it in your hand with the manifold on the right as it is in the photo, the return line is in front. As long as you're happy with the way you've got it connected then all is well and there's no longer any confusion.
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post #22 of 33 (permalink) Old 09-10-2016, 02:20 PM Thread Starter
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Originally Posted by Pharisee View Post
I see your point but I was referring to the pipe which is in front... the one in front of the other. The one nearest you as you look at them. My apologies if I've confused things... my logic always was a bit skewed from most folk's.
Okay so if I understand youse-guys, the front pipe is the suction and the rear pipe is the return?
When facing the engine from the kick start side, the outboard pipe is the return and the inboard pipe is the suction; this is how mine's plumbed.
I have no pressure at the pressure switch port however, I do have some drips of fresh oil. I'll try the compressed air recommendation tomorrow.
It worked normally a year ago when I moth-balled it. Flushed Oil Tank, cleaned the bird n' rock screen, installed new hoses, have good oil flow to the junction block.
Don't have enough inner reserve HP to kick 200-300 times nor enough family members or neighbors to accomplish that task.

Last edited by DeltaPapa; 09-10-2016 at 02:29 PM.
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post #23 of 33 (permalink) Old 09-10-2016, 02:25 PM
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Originally Posted by DeltaPapa View Post
Okay so if I understand youse-guys, the front pipe is the suction and the rear pipe is the return?
That's correct, but to confuse you some more the return line is also the feed line for the rocker boxes.

The drawing Pharisee posted is pretty self explanatory.

Last edited by o1marc; 09-10-2016 at 02:28 PM.
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post #24 of 33 (permalink) Old 09-10-2016, 03:16 PM
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Don't worry about the 300 kicks before you see oil in the return. It's a pointless exercise.
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post #25 of 33 (permalink) Old 09-11-2016, 06:32 AM
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And remember...the pre unit connections are opposite the unit engine..

I've started many Triumphs after having the engine disassembled or if it was sitting for a time...I always use a oil pressure gauge for the initial start up and it can take 10-15 seconds to show pressure..

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post #26 of 33 (permalink) Old 09-11-2016, 09:25 AM Thread Starter
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Quote:
Originally Posted by Truckedup View Post
...I always use a oil pressure gauge for the initial start up and it can take 10-15 seconds to show pressure..
What is the tread size of the pressure port? 1/8NPT or BHP?
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post #27 of 33 (permalink) Old 09-11-2016, 09:44 AM
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Quote:
Originally Posted by DeltaPapa View Post
What is the tread size of the pressure port? 1/8NPT or BHP?
That depends.

Quote:
Originally Posted by Pete
Since 1970,the thread in the timing case has been 1/8" NSP (27 tpi,parallel thread).The fitting,or pressure switch,is meant to pull up against a sealing washer.
Don't use 1/8 NPT (27 tpi,tapered thread);you risk damaging the thread or splitting the case.
Some were built in '69 with 1/8 NPT (tapered thread).
'68 and earlier use 3/8" x 26 tpi BSC thread,and a sealing washer.
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post #28 of 33 (permalink) Old 09-11-2016, 10:04 AM Thread Starter
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Mine is a late 1969 build. I have to consult both the '69 and "70 parts manuals.
When I pulled the sensor it definitely has a tapered thread and uses a thin fiber washer.
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post #29 of 33 (permalink) Old 09-11-2016, 10:07 AM
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Originally Posted by Tritn Thrashr View Post
That depends.
Yes, but for the screwing in a gauge only for the purposes of stationary diagnostic check... 1/8 NPT for us USA guys will screw in a few turns without damage...Just don't force it..

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post #30 of 33 (permalink) Old 09-17-2016, 01:02 PM Thread Starter
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Exclamation Prime the sump.

As the OP and to close the loop on this thread, I had to prime the sump with 1 pint of oil and it solved the LOP/no return to the tank problem.
Thanks to everyone for their recommendations.
Don

Last edited by DeltaPapa; 09-17-2016 at 01:45 PM.
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