(800) 853-2651
SHOP NOW

alternator and voltage

B

Brian806

Member
so my dad has been planting with a mx 120
tractor since he got his planter he has
with no monitor problems! Well mx cracked a
wheel pulled the monitor out of the mx put
in the 1486 and it says to high of voltage
and shuts off over half throttle! How can
I fix this? I don't know much bout wiring I
hate it! Haha
 
a new VR in the 86 might be needed. It should be at 14.2 to 24.7 volts. It could also be noisy electricity with static that causes issues. If the voltage is OK, a static condenser (from a Stereo installation shop) might block voltage spikes. Jim
 
Put a voltmeter on the 1086 at full throttle. It should read 14.5 if the battery is good and up to full charge

Is the volt meter on the tractor pegged or is it in the normal range?

Allan
 
A diode uses .6v. So put a diode in series and see what happens. Try a second or third one until you get the voltage so monitor won't shut off. Connect the anode to the + side of battery. Connect it backwards no harm, monitor won't come on.
 
The correct voltage regulator should limit output to 14.2 volts. This voltage should be measured at the battery or the #2 terminal at the alternator. If the alternator has been replaced with one for automotive use it may have a 14.5 volt or 14.7 volt regulator installed.

Unplug the two wire connector at the alternator and connect the #2 wire to a grounded light bulb and check the voltage at the alternator end of the wire. Adding a small light bulb to this circuit while testing will insure that you will find a problem with a poor corrosion. If it is not within about .1 volts of battery voltage repair the wire between the alternator and #2 terminal at the alternator. That is the wire that the alternator uses to sense the voltage. If the wiring and connections are all good the problem is in the alternator, Almost guarantied to be the regulator.
 
You must log in or register to reply here.

Similar threads

J
MF 245 Diesel Battery/Alternator problems
Replies
6
Views
325
hearnc843
H
A
Ford 7710 Alternator troubles
Replies
4
Views
936
Jim.ME
J
Momo Taro
Let's fix this DB 885
2
Replies
32
Views
1K
Momo Taro
Momo Taro
Slow lane 49
Couldn't say no to a 350 Utility
Replies
18
Views
1K
Slow lane 49
Slow lane 49
L
Battery Cable sizing... placing a bet
Replies
17
Views
1K
HFJ
H
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top