Product Name: ServiSignal Mini Air Filter Restriction Indicator 25HG

Air Filter Restriction Indicator - John Deere Gator Forum

WIX Filters - 24801 Heavy Duty Air Filter Service Gauge, Pack of 1

Too low to display
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  • TAG : ServiSignal Mini Air Filter Restriction Indicator 25HG - X002352
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  • Air filter restriction indicator gauges have been available for quite some time. Initially, these indicator gauges were simply a single stage type gauge where a warning button would pop-up once a predetermined restriction level was achieved. The pop-up type gauges were not believed to be reliable and typically not trusted. The design of these gauges was complex and prone to many variations in performance. Also, this pop-up type gauge was difficult to manufacture due to the number of parts required and the intricacies of their assembly.

    A low cost air filter restriction indicator gauge for use in conjunction with an internal combustion engine can be achieved by both simplifying individual part configuration and reducing overall part count. More specifically, a simplified design can be achieved by utilizing a one piece base cap which includes a locking extension and reset button integral therewith. By having this part injection moldable, it is easy to fabricate and lower in cost as a complex locking pin assembly can be eliminated. Further, the low cost device can be further enhanced by providing a two color visual indicator which displays one color when the device is in its reset position and a second color when the device is in its locked or set position.

  • [0004] Air filter restriction indicator gauges have been available for quite some time. Initially, these indicator gauges were simply a single stage type gauge where a warning button would pop-up once a predetermined restriction level was achieved. The pop-up type gauges were not believed to be reliable and typically not trusted. The design of these gauges was complex and prone to many variations in performance. Also, this pop-up type gauge was difficult to manufacture due to the number of parts required and the intricacies of their assembly.

    Finally after a few hours of looking over the engine and ducting, I located a cracked air filter restriction indicator. Mounted on the intake duct, the crack was very small and hard to see. I was able to see the crack better once I took it off the duct, and immediately understood the problem with the failed filter indicator in photo 1. Air was entering through the crack in the indicator and making the whistling noise.

    10-13-2008, 10:13 AM   #6
    geartooth94
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    Re: Air filter restriction indicator

    maybe that would help if you have mice living in the airbox ???

    ...
    1996 Dodge Avenger ES: 2.5L V6

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  • 10-13-2008, 11:36 AM   #7
    Bill Murray
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    1997 SC1
    1997 SC1
    Re: Air filter restriction indicator

    The GM pickups use these, as do 18 wheelers and construction equipment.

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Air Restriction Gauges - Baldwin Filters