Factory compressor numbers

Discussion in 'Technical' started by Mavdad77, Sep 8, 2021.

  1. xpsnake

    xpsnake Bruce

    Joined:
    Mar 30, 2004
    Messages:
    1,401
    Likes Received:
    184
    Trophy Points:
    177
    Location:
    Maryville, IL (near STL)
    Vehicle:
    1971 Ford Maverick 2-door
    That sure looks like an overflow tank of some kind, never seen one.
     
  2. Krazy Comet

    Krazy Comet Tom

    Joined:
    Sep 13, 2012
    Messages:
    7,561
    Likes Received:
    2,319
    Trophy Points:
    531
    Garage:
    1
    Location:
    Chesapeake VA
    Vehicle:
    1972 Comet GT clone 306 . 1969 Fairlane Cobra 428CJ 1988 T-Bird awaiting 331 ..
    The round blue & cream color rectangular containers are charcoal canisters, fuel tank vents into these, have zero to do with A/C function.

    The round, black "can" under blue tank is the A/C vacuum reserve.
     
    CA189HJN likes this.
  3. Mavdad77

    Mavdad77 Member

    Joined:
    Apr 11, 2020
    Messages:
    31
    Likes Received:
    9
    Trophy Points:
    11
    Location:
    Texas
    Vehicle:
    1977 Ford Maverick
    Thanks KC! I am assuming that there is a missing cap on the left side as you look at it?
     
  4. dyent

    dyent Member

    Joined:
    Jan 29, 2012
    Messages:
    1,144
    Likes Received:
    432
    Trophy Points:
    258
    Location:
    vancouver bc
    Vehicle:
    1973 Comet 2 dr., 302 w/AR aluminum heads, Toploader 4 spd, 9" Trac-Lok w/3.70
    There is a flexible hose that attaches to fitting and goes to side of air cleaner housing........
    David
     
  5. Mavdad77

    Mavdad77 Member

    Joined:
    Apr 11, 2020
    Messages:
    31
    Likes Received:
    9
    Trophy Points:
    11
    Location:
    Texas
    Vehicle:
    1977 Ford Maverick
    Thanks David
     
  6. dyent

    dyent Member

    Joined:
    Jan 29, 2012
    Messages:
    1,144
    Likes Received:
    432
    Trophy Points:
    258
    Location:
    vancouver bc
    Vehicle:
    1973 Comet 2 dr., 302 w/AR aluminum heads, Toploader 4 spd, 9" Trac-Lok w/3.70
    Do you still have the original air cleaner assembly?
    David
     
  7. Mavdad77

    Mavdad77 Member

    Joined:
    Apr 11, 2020
    Messages:
    31
    Likes Received:
    9
    Trophy Points:
    11
    Location:
    Texas
    Vehicle:
    1977 Ford Maverick
    Yes sir
     
  8. dyent

    dyent Member

    Joined:
    Jan 29, 2012
    Messages:
    1,144
    Likes Received:
    432
    Trophy Points:
    258
    Location:
    vancouver bc
    Vehicle:
    1973 Comet 2 dr., 302 w/AR aluminum heads, Toploader 4 spd, 9" Trac-Lok w/3.70
    If your air cleaner assembly still has the fitting for attaching the flexible hose to fitting on charcoal filter unit, you can probably use any tubing (rubber or vinyl) so long as ID is correct, it is not under any pressure, so should be fine. Picture is from my 302 air cleaner, but you can see the black fitting where the flexible hose attaches........
    David

    P1010492.JPG
     
  9. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI

    Joined:
    Mar 9, 2002
    Messages:
    18,218
    Likes Received:
    1,308
    Trophy Points:
    878
    Location:
    Albany, Indiana
    Vehicle:
    1972 Maverick Grabber - Color: Orange Also, 1976 Ford Maverick 4-door, 1977 Mercury Comet 2-door.
    The AC should switch to coming out the DEFROST when accelerating. Very common and NOT an issue. Just the way it is. All my Maverick AC cars do this.
     
    CA189HJN likes this.
  10. Mavdad77

    Mavdad77 Member

    Joined:
    Apr 11, 2020
    Messages:
    31
    Likes Received:
    9
    Trophy Points:
    11
    Location:
    Texas
    Vehicle:
    1977 Ford Maverick
    I would like to thank everyone for their input. I flushed the radiator three times, last time I left the cleaner and distilled water in for a week and drove it back and forth to work every day. Heater on in the morning (with windows down) :) and A/C on in the afternoon. After 5 days I drained it refilled with antifreeze and have not had any issues.
     
  11. Krazy Comet

    Krazy Comet Tom

    Joined:
    Sep 13, 2012
    Messages:
    7,561
    Likes Received:
    2,319
    Trophy Points:
    531
    Garage:
    1
    Location:
    Chesapeake VA
    Vehicle:
    1972 Comet GT clone 306 . 1969 Fairlane Cobra 428CJ 1988 T-Bird awaiting 331 ..
    Glad to hear...

    I doubt they were that way from new(time to break out the shop manual), I don't remember my '75 Granada having that issue.

    Easy enough to install a one way vacuum valve, if it still switches, there's a leak(yeah, probably in selector).
     
  12. Mavdad77

    Mavdad77 Member

    Joined:
    Apr 11, 2020
    Messages:
    31
    Likes Received:
    9
    Trophy Points:
    11
    Location:
    Texas
    Vehicle:
    1977 Ford Maverick
    Does anyone happen to have a PDF of the FSM/TSM for the 77 Maverick the could e-mail me?
     
  13. Drifter69

    Drifter69 Member

    Joined:
    Jan 23, 2019
    Messages:
    71
    Likes Received:
    12
    Trophy Points:
    26
    Location:
    Maine
    Vehicle:
    '72 Maverick Grabber
    It may be very common, but it should NOT happen. This indicates a manifold vacuum loss under load, which in itself is normal, but the system was designed to utilize a vacuum reserve to hold constant vacuum to accessories when under load. Its a simple system, but requires functioning one-way check valves, a reservoir that doesn't leak, and vacuum hoses and pots that also don't leak. If any one (or more) of those parts is not 100% vacuum tight, the vent switching symptoms will happen.
     
    mojo likes this.
  14. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI

    Joined:
    Mar 9, 2002
    Messages:
    18,218
    Likes Received:
    1,308
    Trophy Points:
    878
    Location:
    Albany, Indiana
    Vehicle:
    1972 Maverick Grabber - Color: Orange Also, 1976 Ford Maverick 4-door, 1977 Mercury Comet 2-door.

    I am speaking about heavy, extended acceleration. Eventually....those little "cans" run out of vacuum. :D
     
    CA189HJN likes this.
  15. Drifter69

    Drifter69 Member

    Joined:
    Jan 23, 2019
    Messages:
    71
    Likes Received:
    12
    Trophy Points:
    26
    Location:
    Maine
    Vehicle:
    '72 Maverick Grabber
    The OP stated "Also, when running the a/c... as soon as I accelerate it switches to the floor vents, let off of the accelerator and it blows out of the dash vents."

    "As soon as" = not normal.
    Should be fixed for proper function as-designed. The system was not designed to behave this way, nor should it.
     

Share This Page