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Oil Pressure Switch Location

Home Forums TR3OC Members Forum Oil Pressure Switch Location

This topic contains 3 replies, has 3 voices, and was last updated by  Gareth Holder 2 weeks ago.

  • Author
  • #8692

    Gareth Holder

    Silly question maybe, but the 1974 T-150 I’m currently getting running has an aftermarket oil gauge fitted. I’ve just rewired the whole bike and I realise that I cannot find an oil pressure switch to connect up and the parts manuals aren’t a lot of help in showing where it would normally be. The line to the oil gauge is run to a hole in the middle of the rear of the engine. (Pictured). Would this be where a stock oil pressure switch would be normally ? If so, I’m probably going to have to remove the oil gauge or fit a T Junction in there to run the gauge as well. Can anyone confirm that this is where the pressure switch should go, and if any of you are running both the switch and a gauge ?

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  • #8694

    Peter Hughes


    What you show is the OP warning switch fitting.

    At least on the T160… there are two 5/6″ X 5/8″ UNC  plugs on the front of the crankcase (plug is P/N 14-6113, pos. 23 on pp 16-17 of the T160 parts catalogue) and I’ve fitted the OP gauge line to the TS side plug via a banjo fitting. This way you can get both the light and OP gauge to work on the T160,

    Not sure about the T150, looks like a similar arrangement – refer to parts catalogue pp10-11, Pos. 7, P/N 14-6113. I’m sure others more familiar with the T150 could confirm if this is the case.

  • #8697

    James lucas

    Hi Gareth.  I can confirm the arrangement described by peter is the same on a t150 . I have fitted op gauge using a banjo bolt at the t/s crank bolt locatio regards jamesn.

  • #8709

    Gareth Holder

    Thanks ! All good now. I see the T-150 has the same crankcase oil plugs at the T-160, so I’ll refit the oil pressure switch in it’s original location and probably fit a gauge at some point in the future.


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