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Dan C 
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Location: Port Angeles,WA
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 Topic: Model D Motor Grader
Posted: 16 Oct 2016 at 9:54pm |
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Hi All, I'm new here and I'm also a proud new owner of a Model D Motor Grader. The serial number is D 4697 which I believe makes it a 1956. It runs great and only has a few minor issues. I will post a few pictures when I figure out how.
The question I have now is the scarifier teeth. Does anyone have a good picture with dimensions? I assume nobody is selling these and I will have to fabricate them myself. I'd like to get the size and shape close to what is supposed to be. I also need info on the locking keys.
Thanks,
Dan
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JohnCO
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Joined: 11 Sep 2009
Location: Niwot Colo
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Posted: 17 Oct 2016 at 12:34am |
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I'll try and take a picture in the next few days and email it to you if you pm me your E mail address.
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"If at first you don't succeed, get a bigger hammer"
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Dan C
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Posted: 17 Oct 2016 at 1:57am |
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Thanks John, PM is on the way.
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DiyDave
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Posted: 17 Oct 2016 at 4:48am |
dan, Agrisupply Has several styles available. I can't remember the part# but, they are the longest, straightest teeth they sell...
This is it, IIRR:
Edited by DiyDave - 17 Oct 2016 at 4:52am
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Dan C
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Posted: 17 Oct 2016 at 7:00pm |
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I checked those out at Agrisupply and they are on the small side, like 2" by 5/8" thick. The slots on the Model D are 7/8" by 3-3/4". I did find a Black Cat ripper shank #8110 that is .94" thick by 3" wide. If I mill .035-.040 off each side at the top it should fit and leave 3/4" at the back for the retaining key. It also has a replaceable wear tip. It looks like they are either cast or forged so probably quite a bit tougher then cutting then out of plate steel. Anyway closest that I have found so far.
Thanks for trying,
Dan
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DiyDave
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Posted: 17 Oct 2016 at 7:24pm |
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Dan, you want them to rattle around, a little, cause if you hit a rock, they give a little, before bringing you to a sudden stop...
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Dan C
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Posted: 17 Oct 2016 at 10:34pm |
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How much slop do they need? Once it's in the mill I can remove as much as needed. I'm a machinist by trade so I err on the side of close fits.
Thanks,
Dan
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JohnCO
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Posted: 18 Oct 2016 at 12:46am |
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Those shanks might be made in China or India and the quality of the material isn't usually up to our standards, but the price is right, kind of.
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"If at first you don't succeed, get a bigger hammer"
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DiyDave
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Posted: 18 Oct 2016 at 4:55am |
 Dan C wrote:
How much slop do they need? Once it's in the mill I can remove as much as needed. I'm a machinist by trade so I err on the side of close fits.
Thanks,
Dan |
Interesting question, I'll have to find one with original teeth, though. That could take years, though 
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JohnCO
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Posted: 18 Oct 2016 at 1:14pm |
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I haven't made it over to the Pumpkin farm yet. Hope to have a report this evening.
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"If at first you don't succeed, get a bigger hammer"
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Dan C
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Posted: 18 Oct 2016 at 3:44pm |
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Having a pumpkin farm this time of year must keep you busy. If you get a chance grab a thickness gauge to check how close the shanks fit in the slots.
Thanks,
Dan
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SteveM C/IL
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Posted: 18 Oct 2016 at 9:26pm |
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the ones on the AD4 I ran fit pretty sloppy.that was 40yrs ago but i'd say probably 1/8in on the sides.front wouldn't have been much different.
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Ross D.
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Posted: 19 Oct 2016 at 7:42pm |
   Sorry about the picture sizes. I took this sample from a D grader that was being used in Fenelon Falls, Ontario. I fitted this wooden sample to my D grader and it appears that it is correct. Let us know how you make out with this issue. I am also interested in obtaining a complete set for my "D Special'. Welcome to the Forum. Enjoy the grader. They are fun to operate. Ross.
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Dan C
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Posted: 20 Oct 2016 at 12:29am |
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Ross thanks so much for the picture. The only difference is my slots are 7/8" x 3-3/4" so the 3/4" shank would give 1/8" slop as mentioned above and add 1/4" to the key width. I could get some 3/4" plate stock and carve them out or I can buy the Black Cat shanks and mill the top 5" to 3/4" thick. They are available in .94" or 1" thick. Even if Chinese made they may be tougher and they do have replaceable tips. On the other hand carving them out of plate stock will require more work on my part....Decisions.
Thanks again,
Dan
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BradinNC
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Posted: 27 Oct 2016 at 1:12pm |
I just put a set of rippers on my D grader. I used Cat style 9F5124 Shanks & 6Y5230 Teeth. The shanks were $20/piece and the teeth were $5/piece on Ebay. The slots on the grader were 7/8" wide. I used a torch to trim them 1/8" wider. The way the shanks are made I could have probably ground 1/16" off of each side. For the locks I used 5" X 5/8" angle cut 1" wide. I have some pics. It has been a long time since I last posted to this site. It seems like I had to use photobucket. Maybe someone can refresh my memory. Brad
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BradinNC
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Posted: 27 Oct 2016 at 5:39pm |
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http://s104.photobucket.com/user/lugnut178/media/Mobile%20Uploads/IMG_20161027_071604152.jpg.html?sort=3&o=0
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Dan C
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Posted: 28 Oct 2016 at 3:34pm |
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Your shanks look good. It looks like you ripped a bit of dirt with them, were you happy with how they worked?
Yesterday I took a ride into the big city and picked up a chunk of AR 400 plate stock. I'll be spending the next several days whittling out a set. I made a pattern from the pictures above so I'll see how it goes.
Cheers,
Dan
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Ross D.
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Posted: 01 Nov 2016 at 3:48pm |
Hi. I will try to send a picture of the scarifier frame that was taken from the A C parts book. Ross D. 
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Dan C
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Posted: 05 Nov 2016 at 3:26pm |
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Thanks Ross, I just bought a copy of the service manual and parts book.
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Ross D.
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Posted: 06 Nov 2016 at 7:33am |
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Hi. Have you got pictures that you could post. We would enjoy seeing your machine and your upgrades to the grader? Ross D.
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Dan C
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Posted: 06 Nov 2016 at 2:27pm |
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I'd be happy to post some pictures if I could figure out how. It looks like you need permission or something. As I said I'm new here and I'm not real computer savvy.
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DiyDave
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Posted: 06 Nov 2016 at 5:56pm |
I think you have to have a certain # of posts, to put pictures up. Its not many, IIRR. Keep your chin up, You'll get there, Dan...
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Dan C
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Posted: 07 Nov 2016 at 12:28am |
Ok I think I got it. This is how I found him. The owner was a Minion fan and because it is yellow he drew a Minion on the side of the cab. Naturally I had to name him Stuart.  This is Stuart as he arrived at his new home.  Cheers, Dan
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Dan C
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Posted: 07 Nov 2016 at 12:33am |
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Sorry, I got the pictures posted but I guess I need to work on the size.
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