Rattling noise in engine of D17, series3
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=206432
Printed Date: 27 Jun 2025 at 8:07am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Rattling noise in engine of D17, series3
Posted By: Kruger
Subject: Rattling noise in engine of D17, series3
Date 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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Replies:
Posted By: Ed (Ont)
Date 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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Posted By: RedHeeler79
Date 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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Posted By: DrAllis
Date Posted: 25 Apr 2025 at 8:29pm
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Water pump. Generator bearing. LOOSE CRANKSHAFT PULLEY.
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Posted By: Kruger
Date Posted: 25 Apr 2025 at 9:08pm
Posted By: only AC orange
Date 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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Posted By: Kruger
Date 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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Posted By: AC720Man
Date Posted: 28 Apr 2025 at 9:16pm
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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