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4-53 detroit rattles on deceleration

Discussion in 'Other Construction/Demolition Equipment' started by crbearden, Jun 8, 2019.

  1. crbearden

    crbearden Member

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    I have a 4-53 detroit powering an Ingersoll Vane type compressor. When the pump is up to pressure and the engine decelerates a loud clicking noise is apparrent. Sometimes this noise continues at idle, and then is intermittent. The noise is not heard when the engine is loaded however. I am trying to determine if this is in the lower end or a piston problem.
     
  2. td25c

    td25c Senior Member

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    Oil pressure on engine all cool between idle and full throttle ?
     
  3. funwithfuel

    funwithfuel Senior Member

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    Will county Illinois
    I would be curious if you have a splined coupler or a Lovejoy.
     
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  4. kshansen

    kshansen Senior Member

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    Retired Mechanic in Stone Quarry
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    I was thinking along the same line, that the noise when compressor is unloaded might be looseness in the compressor or the coupling.

    Can you slightly open a valve to put a slight load on compressor but keep engine speed low to see if that makes noise go away?

    Or maybe take a video of it running and upload to YouTube then post a link here so we can hear it?
     
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  5. funwithfuel

    funwithfuel Senior Member

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    Is this machine new to you? Are you new to driptroit? They have a tendency to have a "ring" from the accessory drives when at idle. Next question, how is your alternator driven? Belt or coupler? A video would be best as Kshansen suggested.
     
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  6. thepumpguysc

    thepumpguysc Senior Member

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    I'm w/ FWF.. check coupler between the pump & engine.. most likely place for a rattle..
     
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  7. OFF

    OFF Senior Member

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    Sep 30, 2009
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    Alberta, Canada
    I agree, got to be the coupler between the engine and compressor.
     
    DMiller likes this.
  8. Vetech63

    Vetech63 Senior Member

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