Farm Equipment - 7040 electrical?

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7040 electrical?

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=150134
Printed Date: 19 Aug 2025 at 11:33pm
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Topic: 7040 electrical?

Posted By: j birke
Subject: 7040 electrical?
Date Posted: 04 May 2018 at 6:11pm

Put a new alternator on last fall this spring it don't work again. Took in to a shop had it tested said it was good. Put it on still no out put. Called them they said bypass the from battery to r1 position on alt. and should put out still don't . Where do I go next. Thanks for the input.

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25-40, WD-45, D14, D17D, D19G, D19G, D19D, D19D, 185, 190G, 190D, 200, 7000, 7060, and 8030

Replies:

Posted By: DrAllis
Date Posted: 04 May 2018 at 6:44pm

The heavy 10 gauge wire on the alternator must be connected to the batteries thru wiring from the starter solenoid/battery cable connection. If there isn't 12 VOLTS at the alternator connection, it cannot work. Just above the starter solenoid connection there is a fuseable protection link that could be melted or lost connection.