Farm Equipment - 7045 alternator

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7045 alternator

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=21485
Printed Date: 12 Feb 2025 at 1:47am
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Topic: 7045 alternator

Posted By: BStone
Subject: 7045 alternator
Date Posted: 28 Nov 2010 at 6:12pm

The 7045 has a delco style alt. on it and it want line up with the water pump and crank.The alt is shaft is to short.Has anyone else had this problem?If so how do you get it lined up?

Replies:

Posted By: DrAllis
Date Posted: 28 Nov 2010 at 9:07pm

First off, a 7045 didn't come with a Delco alternator. I'd guess you have the wrong pulley ..... the correct pulley will line up with the waterpump and crank pulley.

Posted By: BStone
Date Posted: 28 Nov 2010 at 9:47pm

Yes I'm sure it's been changed from the original.Would the correct pulley need to be OEM, or will a alt. supply co. be able to get it?

Posted By: MikeKroupa
Date Posted: 29 Nov 2010 at 8:15am

Just use the pulley off a neihoff alt., oem, and you will have correct rpm. Make sure though that the grooves are not wore out and you have good belts., Mike

Posted By: Lynn Marshall
Date Posted: 29 Nov 2010 at 8:29am

The delco alternator should use a larger (tach correcting) pulley for the tach to operate correctly ,otherwise the rpm will register higher than it should.I don't know the exact dimension of the pulley.I get them from Select Parts in Omaha.

Posted By: BStone
Date Posted: 29 Nov 2010 at 5:51pm

Lynn so your using the delco style alt with a pulley from Select Parts and the belts line up correctly and the rpm is correct? Thanks everyone for the help.Was thinking about making another bracket to use with the delco alt.

Posted By: Hurst
Date Posted: 29 Nov 2010 at 6:28pm

The 7000 used a Delco 10si with a tach output on the alternator (3rd spade terminal). I wonder if this pulley would line up and be the correct size for the other 7000 series?

Hurst

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1979 Allis Chalmers 7000
5800 Hours

Posted By: Lynn Marshall
Date Posted: 29 Nov 2010 at 10:14pm

Yes on both counts,belts line up and tach is correct.At least as correct as can be with a belt driven system like this.Hurst-the 7000 tractor pulley is to small,plus it use a smaller width belt than the 7045.