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Thread: Indian four oil pump adjustment.

  1. #51

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    Thanks Larry,
    I don't know what the compression poundage of the spring should be. So, going back to basics, I now understand that too much oil pressure can erode the babbit, and from all of the information that I have seen, I feel comfortable with setting the spill pressure at 40lbs. BTW, I have just found this mentioned in a Indian 4 overhaul manual ; Gear oil pump, Adjusted pressure 30 pounds.
    Maximum pressure after motor is warmed up - 15 pounds minimum. Light oil.
    I'm assuming that this is a pressure gauge reading on an assembled motor.( Allowing for leakage from around the bearings )
    Anyway, I'm testing the pump, just as in Roy's video and the pump reaches high pressure evan when turned slowly and takes a little time to drop to zero after I stop turning the pump. No noticeable end float on the oil pump shaft and it doesn't feel like it's binding either, so 'all-in-all' I feel happy with the pump.
    What I have done is, cut the spring length down, so when the adjuster is wound in half way, the oil spills at 40lbs.
    Thanks again for all your help, and I hope I'm not responsible for any grey hairs ! But this site is my only life-line.

  2. #52
    Join Date
    Jan 2013
    Posts
    128

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    Ivor,
    You are tenacious like a bull dog pup! Good approach on the spring. I urge you to set spill with a modern gauge....then read with your original US gauge and note the difference in reading......and remember it...for me that is sometimes hard to do, like to many PIN numbers.

  3. #53

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    Yes, I went and got a new gauge as you recommended on one of your first replies, it reads in BAR, but translates to read 5lbs less than my original gauge.

  4. #54
    Join Date
    Jan 2013
    Posts
    128

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    Ivor,
    Hope all goes well with the 4, know it is frustrating, but persistence with a 4 is important!
    Merry Christmas to you and yours.

  5. #55

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    Thanks for those kind and supportive words Larry. It all took a turn for the worst yesterday when the front engine mount fell off ! I explained in a reply to my torque setting post.

    Here's wishing you and yours a merry Christmas and a happy new year as well !
    Ivor.

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