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Engine vibration
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Dennis(IA) View Drop Down
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Joined: 12 Sep 2009
Location: IOWA
Points: 363 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dennis(IA) Quote  Post ReplyReply Direct Link To This Post Topic: Engine vibration
    Posted: 01 Sep 2025 at 9:17pm
I have had this tractor over 20 years and this year it seems to have excessive engine vibration, sometimes, when the throttle is halfway or more. I noticed it a couple of weeks ago. After that it seemed normal, then today ( bush hogging a small field) it seemed excessive.  This is without running the pto or anything.  I don’t know, maybe I am going crazy.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21888 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 01 Sep 2025 at 9:40pm
What model and gas or diesel ??
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Dennis(IA) View Drop Down
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Joined: 12 Sep 2009
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Points: 363 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dennis(IA) Quote  Post ReplyReply Direct Link To This Post Posted: Yesterday at 8:33am
Gas.  I know 4 cylinders vibrate anyway, but this seems excessive, I should remove the plate under the flywheel and clutch and have a look.
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Dennis(IA) View Drop Down
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Joined: 12 Sep 2009
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Points: 363 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dennis(IA) Quote  Post ReplyReply Direct Link To This Post Posted: Yesterday at 8:35am
WD 45.  
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21888 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: Yesterday at 8:56am
Tighten up the bolts that hold the engine to the bellhousing (4). Tighten up the bolts that hold the engine across the frame at the front (4).
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only AC orange View Drop Down
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Joined: 06 Dec 2014
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Points: 525 		Post Options Post Options   Thanks (0) Thanks(0)   Quote only AC orange Quote  Post ReplyReply Direct Link To This Post Posted: 6 hours 44 minutes ago at 7:58am
Crankshaft pulley bolt worked loose?
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Dennis(IA) View Drop Down
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Joined: 12 Sep 2009
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Points: 363 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dennis(IA) Quote  Post ReplyReply Direct Link To This Post Posted: 6 hours 33 minutes ago at 8:09am
Good suggestions, I will check those bolts.  Simple things that need to be checked, thanks.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21888 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 6 hours 31 minutes ago at 8:11am
Crankshaft pulley being loose usually causes a knocking sound.
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SteveM C/IL View Drop Down
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 8626 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 2 hours 49 minutes ago at 11:53am
Yeah, the knocking sound is what told me I had a problem. Had to be at the front end at idle to catch it. Wore the crank nose...turned into a $2000 rebuilt engine.
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