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Thread: adjusting front kingpin shims procedure

  1. #1
    Join Date
    Aug 2015
    Location
    Portlandia, Oregon USA
    Posts
    202

    Default adjusting front kingpin shims procedure

    Does anyone have a link to information about how to set up the factory D60 kingpin shims on the front axle? I installed new kingpin bearings and races, upper and lower and am ready to put it all back together. I also have a couple envelopes of the NOS shims to use.

    The factory m715 service manual really doesn't give much detail for someone starting with all the knuckle and kingpin parts in a box like I am. Do I try to split the shim packs evenly between the upper and lower?

    I like the idea of setting and measuring the bearing preload with a beam type torque wrench as described in Tech note #2 from Torque King 4x4: http://www.quad4x4.com/catalog/qk4618

    I also found this from Novak about closed knuckle axles: http://www.novak-adapt.com/knowledge...knuckle-repair

    And most youtube videos are about working on the open knuckle D60 axles.

    Any help is appreciated.
    Thanks,
    Bryce
    1969 M725 ambulance

  2. #2
    Join Date
    Sep 1998
    Location
    North Central Wisconsin
    Posts
    11,520

    Default

    I think this is what you are looking for...from this manual page:

    http://www.m715zone.com/vb/view.php?pg=34chapter13

    Right below the image called:

    Figure 13-23. Installing pinion shaft yoke using tool C-3718.

    This is the procedure I think you want:

    (1) Position steering knuckle (12 fig 13-1) on axle housing (28).
    (2) Position lower shim pack (62 through 65) on steering knuckle and cone and rollers (66) and cup (67) into housing.
    (3) Position lower king pin bearing cap on steering knuckle (12) and install four washers (60) and cap screws (59). Tighten 80 lbs-ft.
    (4) Position upper shim pack (13), woodruff key, steering arm and upper pivot pin (14) on steering knuckle (12). Install four new self locking nuts (15). Tighten to 80 lbs-ft.
    (5) Position seal ring, felt seal (74) and oil seal retainer (24) to steering knuckle (12).
    (6) Clean threads of cap screws (26). Apply sealant to threads and install using new seal washers (25). Tighten to 20 lbs-ft. Refer to figure 13-1.
    (7) Check pivot pin pre-load as follows:
    (a) Hook a spring scale in tie rod socket hole in steering knuckle arm (14 fig 13-1) with steering knuckle in straight ahead position.
    (b) Observe scale indication when knuckle has just started its sweep. Scale indication should be between 12 to 16 pounds.


    No one said it would be easy...it is tricky.
    Lord send your Holy Ghost into our hearts and make the desire of our hearts Your Will.

    Pro-choice, that's a LIE, babies don't choose to die!!

  3. #3

    Default

    What he said^^^^^^^
    My situation was a little different, as I didn't need to replace my king pin bearings with new ones.

    The knuckles only needed all of the old hard grease removed, and a good cleaning with new seals installed.
    That said, I put the old shims back in their original locations, which look to be evenly divided between top to bottom.

    I did remove a few to keep the bearing preload close to factory specs.

    I found it difficult to test preload using the fish scale method , because of the break away torque. But that's the method that I used.

    While your at it, it's worth testing for drum run out at different locations and using the location of least run out.




    Last edited by jeepdan; March 10th, 2018 at 04:51 PM.

  4. #4

    Default jeepdan's truck

    Does everyone covet your truck, jeepdan, or just me?

  5. #5
    Join Date
    Sep 1998
    Location
    North Central Wisconsin
    Posts
    11,520

    Default

    Everyone...to the point of buying a new laptop cause the drool shorted out the last one...
    Lord send your Holy Ghost into our hearts and make the desire of our hearts Your Will.

    Pro-choice, that's a LIE, babies don't choose to die!!

  6. #6

    Default

    Quote Originally Posted by ColoradoSpringsRob View Post
    Does everyone covet your truck, jeepdan, or just me?
    Thanks,
    No, not everyone. I've had a few people tell me that I've "over restored" it.

    But hey, look at this picture of an almost new M715 back in the day.
    You can see shiney hardware (not painted) on it.




  7. #7
    Join Date
    Aug 2015
    Location
    Portlandia, Oregon USA
    Posts
    202

    Default Thanks!

    Thanks for the help with kingpin set-up. I think I have enough info to put it all back together and adjust preload with shims. Hadn't thought about the opportunity to check my freshly turned brake drum positions for minimum run out either Dan. Thanks for that idea.
    Getting closer every week to going for the first drive since 2015
    Thanks,
    Bryce
    1969 M725 ambulance

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