What do you mean by, ...kicks out ?
electrical problem--alternator
I have a 1998 CIH mx100c tractor, the alt.kicks out mostly when AC turns on.installed 90amp alt after original,still problem,installed 120amp. problem still exists. can not run lights and ac at the same time,one or the other.
any thoughts ?
any thoughts ?
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it doesn't operate the ac. along with the other electrical needs
It's a bit difficult to understand your problem.
How does the alternator "kick out".
If you are correct in saying "can not run lights and ac at the same time,one or the other. "
What is it doing? Are you seeing the alternator warning light?
Does it have a voltmeter or just a dash light for voltage/amperage?
Has someone rewired or "repaired" some wiring on the tractor.
Are the lights and AC blower on the same power feed and has someone installed a self resetting circuit breaker in place of a fuse?
Do the lights dim when the AC is turned on or go completely out.
How does the alternator "kick out".
If you are correct in saying "can not run lights and ac at the same time,one or the other. "
What is it doing? Are you seeing the alternator warning light?
Does it have a voltmeter or just a dash light for voltage/amperage?
Has someone rewired or "repaired" some wiring on the tractor.
Are the lights and AC blower on the same power feed and has someone installed a self resetting circuit breaker in place of a fuse?
Do the lights dim when the AC is turned on or go completely out.
Yeah, ...that does not answer the question at all, does itit doesn't operate the ac. along with the other electrical needs
You sure the belt is tight ?
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there are no dash lights,warning lights.rewiring has been done by the previous owner,mini circuit breakers also installed by previous owner,lights do NOT dim or go out when ac is turned on. when alt. is charging--14.3 volts, when it stops, 12 volts. reading is being taken from switch on alt. this alt.problem has been with the tractor from day of purchase.It's a bit difficult to understand your problem.
How does the alternator "kick out".
If you are correct in saying "can not run lights and ac at the same time,one or the other. "
What is it doing? Are you seeing the alternator warning light?
Does it have a voltmeter or just a dash light for voltage/amperage?
Has someone rewired or "repaired" some wiring on the tractor.
Are the lights and AC blower on the same power feed and has someone installed a self resetting circuit breaker in place of a fuse?
Do the lights dim when the AC is turned on or go completely out.
To hazard a guess there is a self reseting circuit breaker tripping,
it could be on the circuit for the alternator excitation lead.
Or it has all the auxiliary loads on one circuit breaker.
It needs to be rewired and the screwups straightened out.
it could be on the circuit for the alternator excitation lead.
Or it has all the auxiliary loads on one circuit breaker.
It needs to be rewired and the screwups straightened out.
The MX-C didn't have a breaker on the alternator power lead from the factory
There were fuses -- the large type at the battery box for the main harness
Could be that someone replaced the fuse with a breaker
Take the voltage measurements at the alternator output post and tell us what you get -- especially when it quits charging
There were fuses -- the large type at the battery box for the main harness
Could be that someone replaced the fuse with a breaker
What is this ? Picture would helpwhen alt. is charging--14.3 volts, when it stops, 12 volts. reading is being taken from switch on alt.
Take the voltage measurements at the alternator output post and tell us what you get -- especially when it quits charging
Look over your wiring especially at the battery box or near the starter. See if you see any of the two terminal units like are shown in the link. If you find one turn the lights a AC on and see if it gets hot or clicks. If you find one tell us what circuits are connected to it. Likely your problem, can’t carry the load.
Example circuit breakers
Example circuit breakers
no breaker was found as examples shown. what signal activates the starter ? removed the main wire from the starter to test for output, ranges from 14-13.3 when wire was reattached, alt. did Not show charge,made sure connection was tight. alt.not charging-12.8
There is a slave relay for the starter near the firewall -- should be hanging or zip tied -- has two large and two small spade terminals...what signal activates the starter ?
The start system operates that relay -- thru the safety switches
Really nothing todo with the charging system tho
Alternator output wire should go directly to the battery cable on the starter -- is yours in good shape ?
the alternator "excite" wire goes to the instrument cluster -- and turns on the alternator to charge -- should be 3 wires on that alternator (1 large, and 2 small)
Did you check the drive belts ?
those can be a problem on that Perkins engine
first off I need to say that I'm doing this inquiry for my Mennonite friend,so it only adds to the confusion of this problem having to relay questions and answers.
Of the two small wires,which is the excite wire ? How many volts needed to excite the alt. ? Voltmeter reading on small wire on top of alt.7.1 when charging,with fan on--6.3volts. drive belts are tight.
Of the two small wires,which is the excite wire ? How many volts needed to excite the alt. ? Voltmeter reading on small wire on top of alt.7.1 when charging,with fan on--6.3volts. drive belts are tight.
Is this a picture of your alternator?
If it is then I would expect the connections to be;
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Battery hot direct to battery at 6 o'clock, exciter at 5 o'clock, the flat side on tab above the bearing hub should be for your tach.
The output of that will be a frequency that varies with the engine rpm.
Edited to; Slide on tab next to the black box is for tach signal
If it is then I would expect the connections to be;
Battery hot direct to battery at 6 o'clock, exciter at 5 o'clock, the flat side on tab above the bearing hub should be for your tach.
The output of that will be a frequency that varies with the engine rpm.
Edited to; Slide on tab next to the black box is for tach signal
The black box is a capacitor -- electrical noise interference suppression
that is the starter
The sensing line voltage is what excites the alternator and it should be the voltage of the system while running, close to 12.5 or 13.5 volts.
Black box in the picture ?that is the starter
No, that is a cap just for noise suppression
As @LouNY said the excite wire is what you need to look into -- that gets power thru the idiot light in the instrument panel to power the alternator
You can ground the wire and watch the light operate
The alternator provides a ground path thru the regulator to activate the charge light -- when the alternator starts charging , the "ground" turns to a "positive" -- and the light goes out
Does your alternator look like the one in the pic ?
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