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02-16-2020, 03:47 PM
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#1
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Senior Member
City: Rocky Point
Vessel Name: Livin The Dream
Vessel Model: Sea Ray
Join Date: Nov 2017
Posts: 155
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Alternator Pully Removal
Finally getting around to removing my non working alternator. I am trying to remove the old pulley to put on new unit. I have it in a vise and the nut is just spinning. Do I need an impact gun to remove?
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02-16-2020, 04:02 PM
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#2
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Guru
City: Cape May, NJ and Englewood, FL
Vessel Name: Irish Lady
Vessel Model: Monk 36
Join Date: Dec 2007
Posts: 3,678
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Is the shaft spinning? An impact gun makes it easy.
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Archie
Irish Lady
1984 Monk 36 Hull #46
Currently in Englewood Florida.
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02-16-2020, 04:04 PM
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#3
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Guru
City: San Francisco
Join Date: Apr 2018
Posts: 1,523
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If no impact gun, since the alternator doesn't work anyway, jam it with a screwdriver or take the case off and grip the rotor in the vice. In either case, make sure you determine if the nut is right hand or left hand threads.....
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02-16-2020, 04:11 PM
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#4
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Guru
City: Aventura FL
Vessel Name: Kinja
Vessel Model: American Tug 34 #116
Join Date: Oct 2017
Posts: 7,047
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Quote:
Originally Posted by larman
Finally getting around to removing my non working alternator. I am trying to remove the old pulley to put on new unit. I have it in a vise and the nut is just spinning. Do I need an impact gun to remove?
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The obvious answer is, take it to a shop. It cant cost too much to have it removed properly and installed properly on the new unit.
Give consideration to buying a new pulley for the new unit. That way you can have to non-working alternator rebuilt and then, you have a back up all ready to reinstall if necessary.
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The meek will inherit the earth but, the brave will inherit the seas.
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02-16-2020, 04:43 PM
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#5
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Enigma
City: Slicker?
Join Date: Oct 2007
Posts: 15,046
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Greetings,
Mr. l. I agree with Mr. OD. Have it re-built. Didn't your new alternator come with a pulley? IF a different size, when you bring the old unit in for re-build, have the shop install a pulley of the appropriate size OR have them leave off the old pulley on the re-build and you can re-use it on the new unit. Personally, I'd buy the extra pulley. Then if you have to change it when out and about, you won't have to fiddle with changing pulleys.
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RTF
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02-16-2020, 09:12 PM
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#6
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Senior Member
City: Rocky Point
Vessel Name: Livin The Dream
Vessel Model: Sea Ray
Join Date: Nov 2017
Posts: 155
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Thanks for the reply used a battery powered impact gun worked like a charm. I’m going to have the old unit rebuilt.
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02-16-2020, 09:16 PM
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#7
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Guru
City: Aventura FL
Vessel Name: Kinja
Vessel Model: American Tug 34 #116
Join Date: Oct 2017
Posts: 7,047
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Quote:
Originally Posted by larman
Thanks for the reply used a battery powered impact gun worked like a charm. I’m going to have the old unit rebuilt.
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Those battery powered tools are very inexpensive (when on sale) and do a fantastic job. Always buy a spare batteries.
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The meek will inherit the earth but, the brave will inherit the seas.
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02-17-2020, 07:05 AM
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#8
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Guru
Join Date: Oct 2007
Posts: 21,559
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The drive pulley is not just a pulley , most have vanes or fins to cool the unit and different pulleys are required for different rotation directions
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02-17-2020, 08:19 AM
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#9
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Senior Member
City: Delray Beach, FL and Denver, CO
Vessel Name: PartnerShip II
Vessel Model: 2003 Mainship 400
Join Date: Nov 2019
Posts: 155
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Another trick would be to use an old fan belt. Put the belt around the pulley, grab the belt close to the pulley with a pair of vice grips. While you may need a few hands, this trick does work. Also has been mentioned, pay attention to threads. Some are left hand.
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02-17-2020, 10:03 AM
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#10
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Guru
City: Aventura FL
Vessel Name: Kinja
Vessel Model: American Tug 34 #116
Join Date: Oct 2017
Posts: 7,047
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strap wrench?
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The meek will inherit the earth but, the brave will inherit the seas.
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02-17-2020, 10:27 AM
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#11
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Senior Member
City: Delray Beach, FL and Denver, CO
Vessel Name: PartnerShip II
Vessel Model: 2003 Mainship 400
Join Date: Nov 2019
Posts: 155
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Quote:
Originally Posted by OldDan1943
strap wrench?
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Yes. AKA a strap wrench. The belt/vice-grips works just as well, probably better because the belt fits into the pulley groove whereas the strap wrench fits around the pulley.
But either should work.
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02-17-2020, 12:45 PM
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#12
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Guru
City: Brookline, NH
Vessel Name: Blue Heaven
Vessel Model: Albin 43 classic double cabin, twin 135 Lehmans
Join Date: Sep 2013
Posts: 1,999
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Quote:
Originally Posted by Newtrawlerowner
Another trick would be to use an old fan belt. Put the belt around the pulley, grab the belt close to the pulley with a pair of vice grips. While you may need a few hands, this trick does work. Also has been mentioned, pay attention to threads. Some are left hand.
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I've used the fan belt trick - it definitely works.
Ken
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02-17-2020, 02:27 PM
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#13
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Guru
City: Cape Cod, MA
Vessel Name: Island Seeker
Vessel Model: Willard 36 Sedan
Join Date: Oct 2007
Posts: 1,169
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You don't mention the brand but look at the end of the shaft and make sure you are turning the correct way. Wrap the fan with rags to put resistance on it and strike your wrench with a hammer. Failing that, any garage, tire dealer, with an impact can take it off for you.
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02-17-2020, 02:44 PM
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#14
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Guru
City: Ft Pierce
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 22,927
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Tried several versions with either slipping or fans bending...battery impact gun had it off in 1/2 second with no holding if pulley or anything.
Will never leave home without it.
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02-17-2020, 05:16 PM
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#15
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Guru
City: Between Oregon and Alaska
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 2,195
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Most alternators have a shaft end that fits a large Allen wrench (or hex key).
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