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Cam degree
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Stoges View Drop Down
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Joined: 27 Apr 2024
Location: Erie Pa.
Points: 38 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Stoges Quote  Post ReplyReply Direct Link To This Post Topic: Cam degree
    Posted: 16 Apr 2026 at 2:34pm
How do you degree a D17 cam? Does someone manufacture an adjustable cam gear, I know you can get one for a JD or elongated the bolt holes on one but the AC is keyed and pressed on. Information please.
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PaulB View Drop Down
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Joined: 12 Sep 2009
Location: Rocky Ridge Md
Points: 5435 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 17 Apr 2026 at 5:10am
You could go a couple of ways. I mainly work on the smaller AC engines and I have made a jig to cut a new keyway in the gear. Others have had an ofset key made.
If I understand correctly, the larger engines at some time had a 3 bolt cam gear, if that is so, you could find one of those cams with the matching gear and slot the holes to get what you need.
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Joined: 12 Jun 2017
Location: Garrison ND
Points: 1158 		Post Options Post Options   Thanks (0) Thanks(0)   Quote im4racin Quote  Post ReplyReply Direct Link To This Post Posted: 17 Apr 2026 at 6:12am
Cummings used an offset key on 855 and L10 engines.
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Joined: 12 Sep 2009
Points: 23480 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 17 Apr 2026 at 7:16am
WD's and early WD-45's had a 3-bolt cam gear attachment method.  Later WD-45's had the press on gear identical to a D-17.     D-17's had two different camshafts, with the difference being the oil pump driving gear tooth count to control oil pump speed/capacity.   Offset key or cut wider keyway in the cam gear slot the way you want the timing to go. What "grind" are you using on your camshaft ??
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