T-80 Compressor question
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Thread: T-80 Compressor question

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  1. #1

    Mar 2015
    11
    30 times
    All Types Of Treasure Hunting

    T-80 Compressor question

    Hello everyone,

    I just bought my first hookah setup, that consists of a T-80, 3.5 hp engine, and a Keene 60 PSI reserve tank. However, I'm having a little issue. About 3 minutes of running it the pressure release valve on the compressor will start popping, and blowing out excess air. This causes the engine struggle and die. If I hit the purge valve on my regulator it will temporarily alleviate the pressure and stop the engine from struggling. When I'm underwater I can't always tell when this is happening though.

    My first thought was to lower the idle so the pressure would build up slower, but when the pressure eventually did built up it died a lot easier that way. I don't know what I'm doing wrong. The compressor has a new diaphragm, and has been thoroughly cleaned. The engine is brand new. Can anyone give me some suggestions? Thanks,

    Shane

  2. #2
    us
    Silver Fiend

    Oct 2009
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    ITs supposed to cycle and blow off excess pressure. Are you running it at least at half throttle? Blow-off shouldnt be doing anything to lug the engine to the point of dying. Are you sure the blow-off valve is set correctly? Only cause I can think of is that the T-80 is building too much pressure, to the point that it just cant function any longer, which is happening right when it pops-off.
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  3. #3
    us
    retired bumb and part time Hobo

    May 2005
    St. Louis, missouri
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    I agree with Jason ! check where your pop off is set at ! take the pop off out and clean it , then adjust it to pop off about 40 PSI . What size pulleys are you using ? Maybe you have the big pully on the engine??
    ratled likes this.

  4. #4
    Charter Member
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    You need a new pop off valve
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  5. #5
    us
    Aug 2004
    Olympia WA
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    A t-80 is rated at 45psi so this is the setting of the pop off valve. Put a pressure gauge on it and see where it's popping at.
    If the pop off setting is correct then you probably have too small of a pulley on the compressor and when it builds pressure it puts too much load on the motor. Coincidental that its popping off at the same time.
    Operational RPM is 1800 but you have to math that out to adjust for pulley reduction
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  6. #6

    Mar 2015
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    Click image for larger version. 

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    Thank you everyone for your responses. My valve does look really old. Where is the best place to buy a new one?
    Does my pulley look like it's the right size?

  7. #7
    us
    retired bumb and part time Hobo

    May 2005
    St. Louis, missouri
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    I just sent you a PM on where to get your pop off valve and pully. !

  8. #8
    us
    Silver Fiend

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    Quote Originally Posted by inshanity View Post
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    Thank you everyone for your responses. My valve does look really old. Where is the best place to buy a new one?
    Does my pulley look like it's the right size?
    OMG no! That pump pulley is COMPLETELY wrong.
    Get them both from KEENE.
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  9. #9

    Mar 2015
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    30 times
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    Thanks!

  10. #10
    Charter Member
    us
    Look at the Historical Gold Mining photo albums on my page

    Jan 2013
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    You want a minimum 2 to 1 ratio on the pulleys like 6" on the T80 and 3" on the motor. The T80 is only rated for 1800rpm. Or... you can run it with that pulley set but do the math and get an rpm meter so that you can keep the T80 safe and save some gas by running it just above an idle.
    russau and Bonaro like this.

  11. #11
    us
    retired bumb and part time Hobo

    May 2005
    St. Louis, missouri
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    Reed ,I've been running on idle (me ole bones) and still running out of gas !!! It's heck to get old so soon in life !
    Reed Lukens likes this.

 

 

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