Freon amount

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Natem18, Jun 8, 2021.

  1. Natem18

    Natem18 Bobtail Member

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    Does anyone have a mid nineties 379 with an e-model cat and a stand-up 63 inch bunk that still has the pounds of Freon sticker on the firewall? I would like to know how much goes in. Thanks
     
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  3. Old Man

    Old Man Road Train Member

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    Motor doesn’t matter.
     
  4. lester

    lester Midwest's #1 Feed Hauler

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    Pretty sure my 01 with standup was 5 lbs
     
  5. Muddydog79

    Muddydog79 Heavy Load Member

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  6. Natem18

    Natem18 Bobtail Member

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    Alright thanks guys.
     
  7. Don379

    Don379 Heavy Load Member

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    thats 6 and half 12 ounce cans. have fun with that bro. such a pain in the ### feeding that in
     
  8. Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    I always kept an eye on the “eye glass” on the dryer, no bubbles, it’s full.
     
    Dino soar Thanks this.
  9. Goodysnap

    Goodysnap Road Train Member

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    I havnt seen an eye on a dryer since like 1980. Shows your age......

    4 to 5 lbs is surely in ballpark. Tweek until pressures are in the sweet spot and duct temps are coldest. Its not an exact science.
     
    Diesel Dave Thanks this.
  10. Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    :D Your probably right, last one I saw was on my 1994 379. I haven’t noticed one nor paid attention to my 2014 388. I know the shop where I parked has a hi-tech system. Looks more like a plug and play set up.
     
    Goodysnap Thanks this.
  11. jason6541

    jason6541 Road Train Member

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    You could also use the psi temperature chart and compare to ambient temp to get correct psi’s and Freon amount
     
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