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  1. Voltage Readings 
    #1
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    Does anybody know what voltage readings should correspond to the E and F marks on the fuel level gauge? I want to calibrate mine - I think it is off.

    Thanks,

    Jeff
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  2. Re: Voltage Readings 
    #2
    Senior Member FarmallMan's Avatar
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    I have them somewhere. If someone else has them ready, please post. If not, I'll let you know once I find them.

    Nick
     
     

  3. Re: Voltage Readings 
    #3
    Senior Member FarmallMan's Avatar
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    The numbers I will list below originally came from a writeup by Larry Ellie:

    Needle just moves: 19.8 V
    Bottom of red: 26.7 V
    Top of red/bottom of green - "E": 33.1 V
    Top of green/bottom of white - "F": 39.0 V
    Top of white/bottom of upper red: 45.5 V
    Top of upper red: 47.3 V

    Hope this helps!

    Nick
     
     

  4. Re: Voltage Readings 
    #4
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    Wow - awesome !

    Thanks Nick.
     
     

  5. Re: Voltage Readings 
    #5
    How do you calibrate the gauge?

    Also, does anyone sell new ones?
     
     

  6. Re: Voltage Readings 
    #6
    Senior Member FarmallMan's Avatar
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    If it reads high, I think you can put a resistor in line with it. If it reads low, I would buy a new one. Try Harold Zimmerman (Clean Power) or the Electric Tractor Store (Jim Coate).

    Nick
     
     

  7. Re: Voltage Readings 
    #7
    It reads low. Damn!

    Strangely enough it read higher with the power use gauge disconnected. It may be coincidence but as I put it back together the voltage readings on the gauge dropped.
     
     

  8. Re: Voltage Readings 
    #8
    Senior Member RJ Kanary's Avatar
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    Oct 2004
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    Sarver, PA
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    Before you panic.......................Do this.

    Verify the voltage reading present at the Fuel Level Gauge itself with a known to be trustworthy VOM .Observe the VOM's readings to see if they vary with the connection / disconnection of the Power Use Gauge. Both gauges have been known to develop leakage paths to the chassis that can make life interesting.
    After slogging through that, we can move on the calibrating your Fuel Level Gauge.
    If it is an OEM Emico® meter, there is a calibration adjustment provided.
    RJ Kanary
    ASE Certified Master Auto Technician.
     
     

  9. Re: Voltage Readings 
    #9
    I'll check the voltage with the connection/disconnection with the power useage. Right now the battery pack is reading 41volts with a multimeter. The voltmeter was reading the same where the wires connect to the fuel gauge, even though the gauge was only registering in the middle of the green area.

    Thanks for the help, Ill take some readings tomorrow.
     
     

  10. Re: Voltage Readings 
    #10
    I disconnected the power gauge today and it made no difference to the fuel guage at all.

    I ran the tractor around, batteries started at 40.7 volts and ended at 37. It seems weak though, slows down on a slight short grade in D gear.
     
     

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