3YM30 Alternator Belt question

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Re: 3YM30 Alternator Belt question

Postby Ereiss » Thu May 24, 2018 11:06 am

Bob, I tried to find the conversion tool on the Gates site, can you send me the link?

I 1) tightened the alternator belt and 2) sanded the alternator and motor pulley. The slapping seems to have gone away. Can't tell you which had the bigger impact but the combination worked. Thank you all for your advice.
Ed Reiss
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out of Marion, MA
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Re: 3YM30 Alternator Belt question

Postby bobr » Thu May 24, 2018 3:31 pm

Hi Ed,

You have to enter your data here, and it will give you the answers you need.


https://www.gates.com/ais

Click the button for "find parts by application" and then choose "power units and marine engines."

Your Yanmar model should pop up at that point.

Here are my results, and again I chose the Heavy Duty (green stripe) model:

Yanmar 3GM30F Diesel
Application Product Type Part No Comment
Belt Drive System
Front End Accessory Drive Components
W.P. FHP Medium Horse-Power V-Belt 6719
Alt. High Capacity V-Belt (Heavy-Duty) 9380HD
Alt. High Capacity V-Belt (Standard) 9380
Cooling System
Coolant Hose
Heat Exch. To Exhaust 90º Molded Heater Hose 28466
Bob R.
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