170 gasser ?
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=209495
Printed Date: 27 Dec 2025 at 12:29pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 170 gasser ?
Posted By: Tracy Martin TN
Subject: 170 gasser ?
Date Posted: 26 Dec 2025 at 9:17pm
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My 170 gas has puzzled me. Repaired replaced alternator. Repaired voltage regulator harness. Replaced voltage regulator. Worked great. No problems. A couple months later, will not click or try to turn engine over. Would not jump across post to energize solenoid. What could cause the drain on battery? Could new regulator be stuck and drain it? Thanks, Tracy ------------- No greater gift than healthy grandkids! |
Replies:
Posted By: steve(ill)
Date Posted: 26 Dec 2025 at 10:48pm
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your going to have to run a few tests.. Battery could be bad.. alternator could have internal short... voltage regulator could have contact STUCK and being grounded... and then any of the wires between them could have a problem... I would start with a fully charged battery.. disconnect the + cable and let tractor set for a couple days.. reconnect and see if battery went dead on its own, or has full charge... Get a amp meter in the line and see what is being drawn out of battery when setting with the key off....... if battery is good, start looking at the alternator / regulator / or even the starter motor... Is any of them feel WARM to the touch ? ------------- Like them all, but love the "B"s. |
Posted By: Tracy Martin TN
Date Posted: 26 Dec 2025 at 11:35pm
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Steve, battery is almost new. Alternator checked good. I put a new regulator on it, but I wouldn't swear it is good. Ain't like the old Neihoffs . My meter was dead today, low battery. I will charge up the battery and test from there. Thanks, Tracy ------------- No greater gift than healthy grandkids! |
Posted By: 55allis
Date Posted: 27 Dec 2025 at 12:14am
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Pull one of the battery cables off in the dark and slightly touch it to the post you pulled. If there’s an any slight spark there’s a draw. You can tell by the size of spark how bad it’s drawing. Newer vehicles have a draw all the time (that’s why they don’t sit as long with a charge). I don’t think alternators are supposed to have a draw… I will start pulling wires and check for spark until the spark goes away and chances are that circuit is possibly the problem. ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD, 1963 A-C D17 series 3 |
Posted By: DiyDave
Date Posted: 27 Dec 2025 at 4:26am
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Never pull wires off of a running engine (alternator equipped). It's a good way to blow the diodes... ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |
Posted By: Gary Burnett
Date Posted: 27 Dec 2025 at 7:31am
| I had about the same issue with my Oliver 1550 gas,regulator was the problem as they are pretty much junk these days.A 1 wire alternator from DB Electrical fixed the problem. |
Posted By: DrAllis
Date Posted: 27 Dec 2025 at 7:43am
| There are "modern" regulators for those old Delcotron alternators, that don't have breaker points inside to stick and run the battery down. They look the same but are electronic on the inside. A nice upgrade and it still looks original. I'm pretty sure if the regulator points stick when shutting the engine OFF, if you notice (which none of us do), the ammeter will show a slight discharge, and not return to true zero. |
Posted By: 55allis
Date Posted: 27 Dec 2025 at 9:12am
Only do that with the engine shut down. ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD, 1963 A-C D17 series 3 |
DiyDave wrote:Posted By: RedHeeler79
Date Posted: 27 Dec 2025 at 9:31am
| An easier method than looking for a spark when touching battery cable to post…. Disconnect the ground cable, and hook a test light between the ground cable end and the negative battery terminal (assuming negative ground). If there’s a draw, the test light will illuminate, and the brightness will give you an idea of how strong the draw is. You can leave it hooked up this way and disconnect components or pull fuses one at a time until the test light goes out. Easy way to find a draw without a multi-meter. |