Announcement

Collapse
1 of 2 < >

Model A Powertrain Technical Forum

Brakes, Drivetrain, Misc
2 of 2 < >

Model A Forums

General Discussion
See more
See less

Adjusting Pressure Plate Fingers / Clutch & Flywheel Info

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Adjusting Pressure Plate Fingers / Clutch & Flywheel Info

    Original Thread
    https://www.vintagefordforum.com/for...-plate-fingers

    Anytime you install a new pressure plate or are chasing the cause of clutch chatter, you need to check to be sure all 6 pressure plate fingers are at the correct height and even with each other. I made this simple tool to make the job quick and easy. I just use a bolt and two nuts through a piece of aluminum channel, and lock the bolt head 11/16" from the face of the aluminum channel. If the bolt head has markings, I file them smooth. This picture shows a pressure plate from Little Dearborn, that I installed for a club member a few years ago. Being a bit off of 11/16" isn't critical, but having all 6 the same measurement is critical.

    I made a hands free similar tool that beeps when the correct height is reached. You can see the picture and description in the "Homemade Tools" section.
    https://www.vintagefordforum.com/for...homemade-tools



    Homemade Tools Clutch Adjuster.jpg
    Attached Files

  • #2
    Important Clutch Disc Warning!

    353ABEF2-6968-45D2-B9B1-CE5E6EE88645.png
    3 ~ Tudor's
    Henry Ford said
    "It's all nuts and bolts"


    Mitch's Auto Service ctr

    Comment


    • #3
      Question.....Can you make pressure plate finger adjustments with the pressure plate still in the car?

      Comment


      • Mitch
        Mitch commented
        Editing a comment
        Yes

    • #4
      Specs for lightening a flywheel


      9607C280-5D50-414B-BABE-412A9D81ADD2.jpeg

      17253693-889E-422A-9B78-788178204558.png
      3 ~ Tudor's
      Henry Ford said
      "It's all nuts and bolts"


      Mitch's Auto Service ctr

      Comment


      • #5
        image_15435.jpg
        3 ~ Tudor's
        Henry Ford said
        "It's all nuts and bolts"


        Mitch's Auto Service ctr

        Comment


        • #6
          Adjusting Pressure Plate Fingers

          Original Thread


          What would be considered an acceptable tolerance when adjusting pressure plate fingers? I had suspected something was off when reassembling everything after putting the new engine in and recently the clutch started to chatter. Turns out none of the adjusting nuts were staked and all of the fingers were around 3/16”-1/4” … way off the 11/16” that they should be. The kicker is the note that came with the pressure plate said “DO NOT ADJUST” …

          Anyway, I made up a tool to gauge the depth, was shooting for 11/16 (.6875). The tool came in at 0.692, not bad. I have a couple fingers adjusted to 0.692+0.004-0.000. Is that close enough or should I aim for a tighter tolerance like 0.002? Is there a spec for this?

          Comment


          • Patrick
            Patrick commented
            Editing a comment
            The spec is .002". Its not too hard to get with the unit on a bench but is tricky when in the vehicle so its my opinion that the .002" is more of a guide line in that situation.

            I just turn a piece of stock to the dimension I want and then make the adjustment so each arm has the same drag. Then I tap each arm a few times gently and check/adjust them again. This is when the thing is on a bench.

            When in the vehicle I just check for the tight arm and use a long .0015" feeler strip and adjust the rest to a fairly tight drag.

            I'm kinda of the opinion that a chatter can come from a few issues.
            Oil/grease where it shouldn't be but I don't see that very often
            Finger adjustment
            flywheel issue
            bellhousing/clutch cover alignment

          • rheacox
            rheacox commented
            Editing a comment
            Well then I'll shoot for 0.002", thanks! It is a bit of a pain in the car. Wish I'd thought about it before when it was on the stand. Oh well, should be able to finish it up tonight without too much hassle. I'll hook the pedal back up, work the fingers a few times and recheck before locking everything in place.

            I'm 90% sure one or more of the fingers moved since none were staked and that's whats causing the chatter, they definitely weren't all at the same depth upon inspection last night. It was butter smooth when the engine first went in.

          • rheacox
            rheacox commented
            Editing a comment
            Got it all buttoned up last night and boy is the clutch smooth again. Patrick, I do see what you mean about the 0.002 being more of a guide line in the car... tried to be a consistent as I could but between variations in holding the gauge I'm probably closer to +/-.004 but the clutch is smooth and I'm happy.

            Went with the full belt and suspenders routine (nuts staked and loctited), let's see em back off now

        Related Topics

        Collapse

        • Tom Wesenberg
          Adjusting Pressure Plate Fingers
          by Tom Wesenberg
          Anytime you install a new pressure plate or are chasing the cause of clutch chatter, you need to check to be sure all 6 pressure plate fingers are at the correct height and even with each other. I made this simple tool to make the job quick and easy. I just use a bolt and two nuts through a piece of aluminum channel, and lock the bolt head 11/16" from the face of the aluminum channel. If the...
          01-23-2018, 11:20 AM
        • BillLee/Chandler, TX
          Clutch matters...
          by BillLee/Chandler, TX
          My car has a lightened flywheel and a V8 clutch. It came that way from an engine build from the mid-80's. The pressure plate has some chunks of steel welded on it, apparently for balancing. Note in the picture the slug of steel welded in at about the 9 o'clock position, and another welded into the hole over the spring at about the 3:30 position. I haven't looked closely (yet) to see if there is any...
          11-05-2018, 11:39 AM
        • Ayyy
          Clutch Pressure Plate: New vs. Rebuilt Original...Which Do You Recommend?
          by Ayyy
          I'll be replacing the clutch in the next few weeks. My stock pressure plate options seem to be either a brand new one, or a rebuilt unit. Which type do you prefer?

          For reference, this is Bert's New Pressure Plate:
          https://parts.modelastore.com/show_Product.asp?ID=13103...
          04-09-2018, 08:22 PM
        • Paul K.
          Clutch Disc F150 3spd w/OD
          by Paul K.
          I need a Clutch Disc for the F150 Transmission Input Shaft. Need 9"dia, 10 teeth spline and 1 1/6" shaft to install with a Model A Clutch and Throw Out Bearing on Model A Flywheel.
          The hole for the Torsion Spring hub on the Model A Pressure Plate is 5" dia.
          Folks say use 86 TBird 2.3L 4cyl Turbo, but that hub is about 5 3/4" dia. Have learned that are using the...
          03-14-2018, 04:57 PM
        • 40B1930
          Clutch Chatter Diagnosis
          by 40B1930
          After 60 miles of shake-down drives, I am hearing clutch disc chatter with the trans. in nuetral. When I press the clutch pedal in to the point where the slack is taken up the chatter stops. After driving the car for a few miles the chatter is gone (maybe the grease on the new throw-our bearing thins after warming)?
          1. All parts are new
          2. Clutch disc was centered
          3. Pressure plate...
          08-26-2018, 07:08 PM
        • Rowdy
          Ford Ahead of Auburn in Design by Late 1928
          by Rowdy
          Shocking statement to make, but have the proof is pictured below. The first pics are of the 1931 to 1935 Aubrn pressure plate. Please note the notches in the ends of the clutch fingers. Second pics are of a stock Model A pressure plate used by Ford from Nov 1928 through 1934. No notches. While the Auburn pressure plate can be used in the Model A as they have the same spring pressure and surface height....
          04-09-2018, 06:39 PM
        • Tom Wesenberg
          Dave's Clever New Clutch Tool
          by Tom Wesenberg
          Last month at our club meeting Dave Gerold showed a clever design he invented for a clutch finger adjustment tool.
          I just posted pictures and the description in the Homemade Tools section of the Chassis Reference.

          https://www.vintagefordforum.com/for...homemade-tools
          03-16-2018, 07:41 PM
        • Paul K.
          10 inch clutch disc on Mode; A Clutch
          by Paul K.
          Has anyone ran a 10 inch clutch disc on a 9 inch Model A Clutch? If so, any problems?...
          08-18-2018, 02:14 PM
        • Jerry Kzoo
          Pressure Plate Adjustment Screws
          by Jerry Kzoo
          Does anyone know of a source to get the pressure plate adjustment screws? I am looking at cleaning one up and adjusting it and it looks like the screws that were staked will not be usable once they are taken apart.

          Thanks, Jerry
          10-22-2017, 08:17 PM
        • canadian
          clutch adjustment.
          by canadian
          I have a 29 , all stock but 12 volt conversion. have just completed a 500 kilometre road test, back a year or so ago while assembling this project when it came to clutch I replaced disc and bearing . I made a finger adjustment tool as per Toms specs. everything operates smooth , no slippage . My issue is , seems like clutch pedal is off floor almost 1/2 to 3/4 of its travel to engage . by depressing...
          06-21-2018, 07:44 PM
        Working...
        X