Generator

Do they make an alternator that would bolt on and replace this generator #1100955?

Thanks
Wayne

I had Kenneth at Classic Generator restore it and it's the best looking and working part of the tractor now!

When you say it dont charge, do you mean the ammeter isnt indicating charge???? Maybe its bad and just not showign charge. If you place a voltmeter on the battery with teh tractor not running, it should show around 12.6 volts. At wide open throttle running, it should rise to around 13.5 to 14 or so, dependign on the condition of the battery and generator. If you have no voltmeter, the lights should glow noticeably brighter at WOT versus idle.

Does the ammeter work okay??? If you turn on the lights does it show discharge???

At WOT, jump the VR's BAT and ARM together and see if she charges then??? If not, ground the field post off the gen (smaller of its 2 output posts) and see if it then charges. If she then charges using those 2 VR by passes (essentially takes VR's job out of the circuit), you may have a bad or broke or improper wires between the VR and gen or a bad VR.

There may be a bad or intermittent shorted wire in the system. A test lamp or voltmeter on the VR;s BAT terminal should ALWAYS BE HOT. If the gens output isnt getign to the battery, it cant charge it. The path to trace is out the gens ARM post, to the ARM terminal on the VR, inside the VR' cutout relay which connects to the VR;s BAT terminal, from the BAT terminal to the load (non battery) side of the ammeter, through the ammeter, then to the starter post (hot feed) or the battery itself. The VR then internally connects the BAT and ARM terminals together (so gen can charge the battery) ONLY after the gens voltage rises sufficient to charge the battery.

If the grounds are good and the ammeter is working, and the wiring from the battery to and through the ammeter, down to the BAT terminal on the VR is okay, and the VR by pass tests still wont allow charging after polarization, you may have a bad generator, possibly an intermittent field or incorrect polarity. I guess the brushes are of sufficient length?? and held down tight as mentioned above?? cuz that can be a problem if not. Is this still wired pos ground???

You can convert to neg ground and use an alternator, but if you already have a new VR, I would first try and get the gen working if possible. It could have a shorting armature or internmittent field problem.

Let us know. Ol John T Nordhoff in Indiana

~If the voltage is low when the ammeter shows a �no charge� start with the generator & regulator grounds & make real sure both the generator & regulator have good CLEAN grounds. [common problem].

~Then move on to the wire between the regulator {bat} terminal & ammeter NON battery side post. Make sure it is good, has NO OPENS & the connections are good & tight [another common failure].

~Then move on to the {gen} & {fld} wires between the generator & regulator. Those wires do get old & form resistance or opens at the connectors.

~If all ok so far you might have weak brush springs in the generator, or an occasional sticking brush.

~Usually on a generator it is either good of bad & doesn�t usually come & go unless you are fighting a dirty commutator or sticking brushes.

~If nothing found so far�Next time it shows a NO CHARGE first take a jumper wire & short the [F] post {smaller of the two} to a GOOD ground & see if it starts charging [if so suspect a poor ground or regulator problem]

~Then with the [F] post still grounded take a jumper wire & connect the [A] post {larger of the two} on the generator to the [BAT] terminal on the regulator [if it charges then suspect a bad wire or faulty regulator].

~If it still doesn�t charge make sure the [BAT] terminal on the regulator has battery voltage at it.

~Doing the above will eliminate certain on tractor known problems & try to point you at the problem area.

~If you still suspect the generator, take it apart & look for shorted wires, opens in the internal wires, mica sticking up from between the commutator segments, burnt windings, sticking brushes, then check the commutator for shorts to the shaft & check the field windings for shorts to the case.

~Post back if problems found & we will talk you through the repair�

Before you throw the generator away, make sure you have a good clean ground to chassis for the generator (I put "star" washers in that joint to the bracket), and that the VR is mounted on a good clean ground to the generator case. I had a very similar problem on my 70D, and it turned out to be a slick, stretched, belt. Make sure that belt is tight and that it has a good bite.

When you say it doesn't charge, do you mean that it goes to discharge ? Or stays at "0". Lights on does it discharge ? Switch on, engine off, lights on, discharge ? Need to make the ammeter is swing in the right direction.

When the genrator guys get in here they'll need to know those things. John T anc Clooney can give you their standard "what to check" text, which will likely include grounding the field terminal on the generator. This will force the generator to full output and is generally very revealing. This showed me that my generator had fine output as long as I could get the VR to kick in.

Lastly, you can put an alternator on there, and they work well especially at lowere engine speeds and if you don't operate the tractor for longer periods. But you'll likely have to swap to negative ground, and flip the wires on the ignition coil.

If you toss the genrator and VR, put it in a box. Someday you might wish you'd kept it.

Frank-in-Tallahassee
70D // 855

Before you throw the generator away, make sure you have a good clean ground to chassis for the generator (I put "star" washers in that joint to the bracket), and that the VR is mounted on a good clean ground to the generator case. I had a very similar problem on my 70D, and it turned out to be a slick, stretched, belt. Make sure that belt is tight and that it has a good bite.

When you say it doesn't charge, do you mean that it goes to discharge ? Or stays at "0". Lights on does it discharge ? Switch on, engine off, lights on, discharge ? Need to make the ammeter is swingint ehright direction.

When the genrator guys get in here they'll need to know those things. John T anc Clooney can give you their standard "what to check" text, which will likely include grounding the field terminal on the generator. This will force the generator to full output and is generally very revealing. This showed me that my generator had fine output as long as I could get the VR to kick in.

Lastly, you can put an alternator on there, and they work well especially at lowere engine speeds and if you don't operate the tractor for longer periods. But you'll likely have to swap to negative ground, and flip the wires on the ignition coil.

If you toss the genrator and VR, put it in a box. Someday you might wish you'd kept it.

Frank-in-Tallahassee
70D // 855