66 T120 Oil circuit diagram? - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 12 (permalink) Old 09-12-2013, 07:02 AM Thread Starter
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66 T120 Oil circuit diagram?

I am waiting on a service manual to get here that hopefully will shed light on my inquiring minds questions...But in the meantime...

I am wondering if there is an oil circuit diagram. I was looking at a video that was detailing the oil pump system and I'm curious now what the oil circuit is.

It looks as if oil is gravity fed to the pump and them i would assume the pump feeds the crank and cams through the block?

and I see there is a hose that feeds the rockers. is that pumped separately. tank/pump/rockers? or is that fed from oil from the block?

How does the oil return to the tank? is there a filter someplace?

I was watching the LUNMAD youtube video's showing him adding an oil filter and this got me wondering where in the circuit is the filter going?


Zc
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post #2 of 12 (permalink) Old 09-12-2013, 07:19 AM Thread Starter
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And of course the second I post this. i googled in a different want and found a FREE service manual that i just ordered...and lo and behold...here is the oil circuit diagram...sheeesh...
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post #3 of 12 (permalink) Old 09-12-2013, 07:20 AM
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post #4 of 12 (permalink) Old 09-12-2013, 07:23 AM Thread Starter
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LOL! yup MEGA thanks! that is the manual i just downloaded...AND the manual i just ordered off eBay hahaha oh well...


Zc
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post #5 of 12 (permalink) Old 09-12-2013, 08:30 AM
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Lunmad should have explained the send/return from the filter. I'm sure thathe will have done.

It goes from the return side of the engine, after both sides of the pump.
You're just iinterupting the return with the fliter and allowing the filter outputto return back to the tank
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post #6 of 12 (permalink) Old 09-29-2013, 02:43 PM Thread Starter
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looking at the oil circuit, you can't really put a filter where it really should go. after the oil pump and before everything else.

whats the risk of reducing oil flow or pressure to the rockers with the filter inline there??

I was thinking of using an oberg tattletale type reusable filter.

Zc
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post #7 of 12 (permalink) Old 09-29-2013, 03:34 PM
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A filter in the return line appears to have no bad effects on rocker feed or anything else.
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post #8 of 12 (permalink) Old 09-29-2013, 03:41 PM Thread Starter
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I suppose that should the filter get clogged, cutting off oil flow to the rockers would be....less bad... then cutting off all oil flow?
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post #9 of 12 (permalink) Old 09-29-2013, 04:02 PM
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I suppose that should the filter get clogged, cutting off oil flow to the rockers would be....less bad... then cutting off all oil flow?
If you left it unchanged for 50,000 miles it might clog. Then the hose would be forced off and the scavenged oil would be pumped out onto the road.
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post #10 of 12 (permalink) Old 09-29-2013, 05:09 PM
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Oil filters have a bypass valve which opens if they get clogged.

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