882D Starter
 

Went to start the tractor up and the starter won't turn. The PO did the starter upgrade and installed a push button to engage the Bendix in conjunction with the key ignition. The Bendix push button works and throws the Bendix, but the starter doesn't turn. Fully charged battery and wire connections seem tight. Not sure where to start.

At the beginning..... I hear it's a very good place to start. :biggrin2:


Is there a brass strap (or heavy braided wire,,,,, anything) that goes from the solenoid to a stud on the starter?

Well, I don't know why a push button is needed but you need to check and see if you are getting 12VDC at the starter solenoid. If you are, throw the starter in the trash and buy this,
https://www.ebay.com/itm/PREMIUM-NEW...lXBAuq&vxp=mtr

If you are getting less than 12VDC you need to check your wiring for issues.

Do you know why the po installed a push button? If the switch isn't working properly get a replacement as here.
http://www.messicks.com/part/66706-5...gnition-switch

12 volts to the starter.
 

Do not use a volt meter to check the voltage to the starter. It may show 12 volts but will not show amps. Do a voltage drop on the wires from the battery to the starter. Do not forget about the ground side.


http://www.aa1car.com/library/voltage_drop_testing.htm

Just connect jumper cables directly from battery to starter terminal and starter mounting.
If it turns over properly, back track and see where it is loosing the power along the way.
If it doesn't turn over, then you need to address a starter motor problem.
Pretty simple diagnosis to preform.:beerchug:

Confirm you are also getting proper 12v on your crank signal circuit to the solenoid on your starter. I assume they put in push button because of an issue with the ignition switch, probably wired the push button right from the battery
+ to the solenoid on starter?. I also did the upgrade on mine but had to install a relay because ignition switch was not providing enough juice to engage the solenoid fully.

Well life got in the way, but I was finally able to get out to the shed. Here's what I found. There is a heavy gauge wire going from the + battery to the solenoid. From the solenoid, heavy wire goes to starter while smaller gauge wire goes to the ignition. Another wire runs from the starter to the push button.

I ran jumper cables from the battery to the solenoid and the push button would turn the starter, but not enough power to turn the motor over.

So to me it sounds like the starter is fine, but the PO did some crazy wiring. Is there a way to simplify and fix the problem?

I'm not sure why the PO thought the starter system need a second solenoid wired in series with the one mounted on the starter. You should have a heavy cable running from the battery positive to the solenoid mounted on the starter and one exciter wire coming from either your ignition switch (factory) or from the PO installed push button switch and going to the small terminal on the starter solenoid. No other solenoid or wiring is needed. Make sure all connections are clean and tight. A common problem on these tractors is a poor ground connection between the starter and it's mounting. The ground cable from the battery is bolted to the block near the air cleaner. I have added a separate ground cable from the battery negative to the starter mounting bolt on all my diesels to correct this. Hope this helps.

What a mess that looks like.
As diesel doctor said, one heavy gauge from battery+ to starter solenoid main lug. And one small wire- ignition/crank signal 12v source from key to spade terminal on the starter. doesn't get any more simple then that.

Wouldn't checking the voltage at the starter do the same thing while cranking?