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40 T starting/ignition question

J

JEC

Member
My 40 was running good when I parked it and covered it with a tarp a month ago. Went to start it and it acted like a dead battery. Charged the battery and nothing, not even a click. Battery has 12 volts but at the starter nothing like the key is off. I'm guessing something between the starter and key? Not sure if there is a fuse there or not. I went to pull the sheetmetal and dash guage cluster to get a better look and got swarmed by wasps. Going to go to town and get wasp spray first. Just wondering if anyone had any suggestions for what to look for/test?
Thanks in advance
 
Thanks! I was going to start it up and then put a new temperature guage on it. Now I know for sure what I'm looking for.
 
Charged the battery and nothing, not even a click.

The dash fuse does not control the starter, just the ignition, etc. With no click, I suspect the starter switch.

BE CAREFUL - remove the starter switch and touch the cable to the post on the starter frame. If nothing, then it's starter repair time. If the starter kicks in, the switch is bad. BE CAREFUL - tranny in neutral!
 
Not sure if this is the exact diagram, it indeed shows a fuse as the good M Man (hes the dude who was kind enough to post the diagrams and is handy around a Dubuque if I correctly recall) mentioned. Take a test lamp on the starter solenoids small S input terminal and see if it gets hot when you engage start as that's the voltage signal necessary to engage the starter solenoid so it will crank over. Just for the heck of it Id check each and every battery cable and starter and ground post and connection. If theres no hot voltage getting to the start solenoids small S input look for a problem at the switch or its input voltage source (or fuse???) but if signal voltage is there but the solenoid doesnt pull in it may be bad. Even if a starter is bad (I doubt) the solenoid should make a click when voltage hits its input.

John T
40-1-JPEG.jpg
 
We had the same problem with "Audie" our Model 40S.

The starting motor gets power directly from the battery.

If your battery has been fully charged, then check to make sure you have a good "ground".

If your battery has a good ground, then check to make sure you have power to the starting motor switch.

Take a look at the diagram below.

a168472.jpg" width="650"


Pull the lever (Key 28) back to engage the starting motor switch.

If the starting motor does not engage, then remove the switch and check for wear on the copper contact.

If there is a lot of wear, then you might consider replacing the switch.

Take a look at the diagram below.

a168480.jpg" width="650"


Check the terminal screw (Key 16) for wear.

If there is a lot of wear, then you might consider rotating the terminal screw 180<sup>o</sup> or replacing the terminal screw.

Rotating the terminal screw might provide enough contact with the switch.

While the starting motor is apart, check the starting motor assembly (Key 45).

You might consider replacing the starting motor assembly.

We eventually replaced the starting motor assembly to make it work.

Hope this helps.
 
My bad, I just woke from my daily afternoon nap lol and put my glasses on and looked at the diagram again (NOT a Dubuque man) and think I was mistaken THAT TRACTOR STARTER MOTOR DOES NOT USE AN ELECTRIC SOLENOID BUT A SADDLE MOUNT MECHANICAL PUSH TO START SWITCH so disregard my ramblings about the solenoid switch grrrrrrrrrrr

On tractors I am familiar with that use such a switch I have seen linkage problems whereby when you depress the switch the actual push down button is not allowed to fully bottom out so the starter never gets power to spin. See if you can use a spacer or other means to fully depress and bottom out the push switch and see if the starter spins then.

Also as I mentioned before a bad starter cable or ground or battery post connection can cause her not to crank over.

Sorryyyyyyyyy for my mistake, its NOT the first nor will it be the last time grrrrrrrrrrr

John T
 
JCarroll has the scoop. It was a burned out/up contact on my 420 when it had that symptom.

good luck
 
EXCELLENT I messed up earlier until I took a nap and put my glasses on and realized that tractor uses a push to start mechanical saddle mount starter switch NOT a solenoid grrrrrrrr my bad.

On those switches I have had luck by cleaning and filing off any carbon on the contactor and the starter post which got them going again. The plunger and starter post and contactor can get burned and pitted so bad the starter never cranks.

Ive also had some where after a cleaning and filing of the copper parts I wollered out the 2 small mounting holes which re positioned the contact parts and they worked again.

Of course, the copper button out the starter can get so worn and pitted even a new switch doesnt cure the problem and a starter shop has to install a new copper post.

Good post and information, those pictures are worth a thousand words

John T NOT a Dubuque kinda guy
 
if everything seems to be in order like the rest of the guys have suggested, then try this.
slacken off the nut and set screw that holds the starter in place. tap it back with a hammer out of the clutch housing. you may or may not have to take the right hand battery box off to move the starter out of the clutch housing. it only has to move an inch or so. the problem is that the bendix may be stuck on the flywheel and not going back into resting place. Put it back into place and try it. I have seen the starters jam up more than once and have caused a lot of unesesary repairs.
U can also try instead of removing the starter to put it in hi gear and rock the rear tires back and forth. this will jar the starter loose.
good luck and be carefull, make sure the battery is disconnected and no power to the starter.
 
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