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D 15 road draft tube
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ACinSC View Drop Down
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Joined: 16 Dec 2015
Location: South Carolina
Points: 3048 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ACinSC Quote  Post ReplyReply Direct Link To This Post Topic: D 15 road draft tube
    Posted: 21 Oct 2025 at 7:07pm
When I got my D 15 (gas engine) it had one, which I replaced with a regular breather/oil fill. Just wondering if this was O.E. Anyone know? It's a 1961 . Thanks
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 22110 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct 2025 at 9:54pm
Early D-15's prior to s/n 9001 had an oil fill/breather cap like a D-17 did with no road draft tube. Effective with s/n 9001 (series 2) the valve cover was different and the oil fill cap was a 1/2 turn twist to remove or install and had to have a road draft tube because it sealed up tight. What you have/had, I have no idea.

Edited by DrAllis - 21 Oct 2025 at 11:09pm
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Points: 3048 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ACinSC Quote  Post ReplyReply Direct Link To This Post Posted: 22 Oct 2025 at 4:46am
Thanks Dr Allis. My tractor is 4065 I think? I just came across the draft tube in the shop and thought I'd ask about it
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Joined: 12 Sep 2009
Points: 22110 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 22 Oct 2025 at 6:21am
If you have the correct valve cover (by s/n) there isn't any place to even connect a blow-by tube.
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Joined: 16 Dec 2015
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Points: 3048 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ACinSC Quote  Post ReplyReply Direct Link To This Post Posted: 22 Oct 2025 at 6:34am
It came out of the top where the oil fill/breather goes. Thanks
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Joined: 12 Sep 2009
Points: 22110 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 22 Oct 2025 at 7:41am
Sounds homemade to me. A hose that connects to where the breather/fill cap goes sounds like something I would have done to keep oil from splattering on spark plug wires.
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Joined: 11 Sep 2009
Location: illinois
Points: 88431 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 22 Oct 2025 at 7:42am
if you have an old engine with excessive blowby... it was not uncommon to put a draft tube on to keep the oily mess shooting toward the ground and keep it off the engine block and valve cover..
Like them all, but love the "B"s.
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Points: 3048 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ACinSC Quote  Post ReplyReply Direct Link To This Post Posted: 22 Oct 2025 at 8:03am
Sounds about right. Thanks Dr Allis and Steve
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