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Kruger 
Bronze Level
Joined: 02 May 2021
Location: 16668
Points: 63
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 Topic: Rattling noise in engine of D17, series3
Posted: 25 Apr 2025 at 7:39pm |
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Today, while the tractor was idling, I noted a rattling noise from the front of the engine. It appeared to originate near the belts. It appeared that the belt appeared to stretch and contract while the engine was running. The belt to the alternator did not appear loose. Due to a time constraint, I did not look further. I had the engine rebuilt last year. Let me say that I am no a mechanic. Any ideas of possible causes. Thanks for whatever help you can provide.
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Ed (Ont)
Orange Level
Joined: 08 Nov 2009
Location: New Lowell, Ont
Points: 1508
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Posted: 25 Apr 2025 at 7:48pm |
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Get a good hold on the fan blades. Wiggle back and forth to see if any play in water pump. Do the same with generator or alternator.
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RedHeeler79
Silver Level
Joined: 09 Sep 2023
Location: NE Kansas
Points: 204
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Posted: 25 Apr 2025 at 8:09pm |
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Possibly the soldering broke loose on fan shroud and fan blades are contacting loose shroud?
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DrAllis
Orange Level Access
Joined: 12 Sep 2009
Points: 22149
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Posted: 25 Apr 2025 at 8:29pm |
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Water pump. Generator bearing. LOOSE CRANKSHAFT PULLEY.
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Kruger
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Joined: 02 May 2021
Location: 16668
Points: 63
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Posted: 25 Apr 2025 at 9:08pm |
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Thanks gentlemen!
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only AC orange
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Joined: 06 Dec 2014
Location: Eastern Indiana
Points: 550
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Posted: 26 Apr 2025 at 8:56pm |
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I vote for the loose crank pulley! Many years ago, my set. III had a rattle noise, sent it to dealer for repairs expecting serious consequences - hauling bill was lot more than bill to tighten the set screw!
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Kruger
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Joined: 02 May 2021
Location: 16668
Points: 63
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Posted: 28 Apr 2025 at 6:25pm |
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As an update, I checked the water pump, power steering pump, and crank shaft pulley. All appeared OK. I really did not check the belts closely, and surprise the deflected at least an inch. So tightened them up and noise gone. Thanks again for all the excellent advice.
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AC720Man
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Joined: 10 Oct 2016
Location: Shenandoah, Va
Points: 5250
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Posted: 28 Apr 2025 at 9:16pm |
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Glad it was that easy. You got some good advice that paid off. Thanks for letting everyone know your findings.
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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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